( TL19E1PE10400000000HBAT00 )

A/T System Symptom Troubleshooting Index

Symptom | Probable Cause(s) | Notes
--- | --- | ---

When you turn ignition switch to ON (II), D indicator comes on and stays on in all shift lever positions, or it never comes on at all

- F-CAN communication line error
- Gauge control module defective
- PCM defective

- Check the F-CAN communication line for a DTC; R20A3 engine model, K24Z3 engine model.
- Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function.

A/T gear position indicator does not come on while shift lever is in that position

- F-CAN communication line error
- Gauge control module defective
- PCM defective
- Transmission range switch defective

- Check the F-CAN communication line for a DTC; R20A3 engine model, K24Z3 engine model.
- Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function.
- Inspect the transmission range switch; R20A3 engine model, K24Z3 engine model.

Shift indicator does not work

- F-CAN communication line error
- Gauge control module defective
- PCM defective
- Transmission range switch defective

- Check the F-CAN communication line for a DTC; R20A3 engine model, K24Z3 engine model.
- Check the F-CAN communication line by using the gauge control module self-diagnostic function.
- Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function.

When you pull paddle shifter + (upshift switch) in D and S, transmission does not upshift | A problem in paddle shifter + (upshift switch) circuit | Check the paddle shifter + (upshift switch) circuit; R20A3 engine model, K24Z3 engine model.
When you pull paddle shifter − (downshift switch) in D and S, transmission does not downshift | A problem in paddle shifter − (downshift switch) circuit | Check the paddle shifter − (downshift switch) circuit; R20A3 engine model, K24Z3 engine model.

M indicator does not come on even though paddle shifter + (upshift switch) or paddle shifter − (downshift switch) is operated in sequential shift mode

- F-CAN communication line error
- Gauge control module defective
- PCM defective

- Check the F-CAN communication line for a DTC; R20A3 engine model, K24Z3 engine model.
- Check the A/T gear position indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function.

Paddle shifter + (upshift switch) illumination does not come on when combination light switch is turned on while ignition switch is ON (II)

- Paddle shifter + (upshift switch) illumination circuit
- Paddle shifter + (upshift switch) illumination

Check the paddle shifter + (upshift switch) illumination circuit.

Paddle shifter − (downshift switch) illumination does not come on when combination light switch is turned on while ignition switch is ON (II)

- Paddle shifter − (downshift switch) illumination circuit
- Paddle shifter − (downshift switch) illumination

Check the paddle shifter − (downshift switch) illumination circuit.

Kickdown timing and kickdown click timing is out of synchronization

- Accelerator pedal kickdown click system incomplete learn
- Accelerator pedal position sensor circuit
- Accelerator pedal position sensor defective

- Do the accelerator pedal kickdown click system learn procedure.
- Inspect the APP sensor signal; R20A3 engine model, K24Z3 engine model.

Shift lever cannot be moved from P while you are pressing on brake pedal

- Accelerator pedal position sensor circuit
- Accelerator pedal position sensor defective
- Brake pedal position switch circuit
- Brake pedal position switch defective
- Shift lock solenoid defective
- Shift lock solenoid control circuit
- Shift lock mechanism
- Throttle body defective
- Transmission range switch ATP P switch stuck OFF
- Transmission range switch ATP P switch line opened

- Troubleshoot the shift lock system circuit; R20A3 engine model, K24Z3 engine model.
- Test the shift lock solenoid.
- Inspect the transmission range switch; R20A3 engine model, K24Z3 engine model.
- Inspect the APP sensor signal; R20A3 engine model, K24Z3 engine model.

Ignition switch cannot be moved from ACCESSORY (I) to LOCK (0) (key is pushed in, shift lever in P)

- Interlock control system circuit
- Key interlock solenoid stuck ON
- Park pin switch stuck OFF
- Transmission range switch ATP P line opened

- Troubleshoot the key interlock system circuit.
- Inspect the transmission range switch; R20A3 engine model, K24Z3 engine model.

HDS does not communicate with PCM or vehicle | DLC circuit | Troubleshoot the DLC circuit; R20A3 engine model, K24Z3 engine model.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Engine runs, but vehicle does not move in any gear

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

Low ATF level
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Mainshaft worn or damaged
Final gears worn or damaged
Transmission-to-engine assembly error
Axle disengaged

- Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Check the line pressure.
- Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure if not detected. Use the proper tools.
- Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
- Check the ATF strainer for debris. If the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
- Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the torque converter, cooler, and lines.

Vehicle moves in R, but not in D, or 1st in S

1.
2.
3.

1st accumulator defective
1st gears worn or damaged
1st clutch defective

- Check the 1st clutch pressure.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.
- Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Vehicle moves in D and R, but not in 2nd in S

1.
2.
3.

2nd accumulator defective
2nd gears worn or damaged
2nd clutch defective

- Check the 2nd clutch pressure.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.

Vehicle moves in D and S, but not in R

1.
2.
3.
4.
5.
6.

Shift solenoid valve E defective
Shift fork shaft stuck
Shift valve E defective
4th/reverse accumulator defective
4th clutch defective
Reverse gears worn or damaged

- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Check for a missing shift fork bolt on the shift fork shaft.
- Check the 4th clutch pressure.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 4th gear and the reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes a clicking, grinding, or whirring noise, also replace the mainshaft 4th gear, the reverse idler gear, and the countershaft 4th gear.

Poor acceleration; flares when starting off in D, S, and R; stall speed high in D and S in 1st and 2nd

1.
2.
3.
4.
5.
6.

Low ATF level
Shift cable broken or out of adjustment
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Torque converter check valve defective

- Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Check the ATF strainer for debris. If the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Poor acceleration; flares when starting off in D, S, and R; stall speed high when starting off in 2nd in S

2nd clutch defective

- Check the 2nd clutch pressure.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.

Poor acceleration; flares when starting off in D, S, and R; stall speed high in R

1.
2.

Shift cable broken or out of adjustment
4th clutch defective

- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Check the 4th clutch pressure in D and R.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.

Poor acceleration; stall speed low in D and S in 1st and 2nd

1.
2.
3.
4.
5.

Shift solenoid valve E defective
Torque converter one-way clutch defective
Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective

- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Replace the torque converter.

Poor acceleration; stall speed low in R | 1. 2. 3. 4. | Engine output low Torque converter clutch piston defective Lock-up shift valve defective Torque converter one-way clutch defective | Replace the torque converter.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Engine idle vibration

1.
2.
3.
4.
5.
6.
7.

Low ATF level
Shift solenoid valve E defective
Drive plate defective or transmission misassembled
Engine output low
Torque converter clutch piston defective
ATF pump worn or binding
Lock-up shift valve defective

- Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
- Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Inspect the ATF strainer for clogging with particles of steel or aluminum. If the ATF strainer is clogged, replace it, and clean the torque converter, cooler, and lines.
- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Check for a misinstalled/damaged drive plate.
- Check that the idle rpm in gear is the specified idle speed; R20A3 engine model, K24Z3 engine model. If the idle speed is correct, adjust the engine and the transmission mounts.
- Replace the torque converter.

Vehicle moves in N

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.

Excessive ATF
Foreign material in separator plate orifice
Relief valve defective
1st clutch defective
2nd clutch defective
3rd clutch defective
4th clutch defective
5th clutch defective
Clearance between clutch end-plate and top disc incorrect
Needle bearing seized, worn, or damaged
Thrust washer seized, worn, or damaged

- Check the ATF level, and drain the ATF if it is over-filled.
- Check the 1st, 2nd, 3rd, 4th, and 5th clutch pressures.
- Check the ATF strainer for debris. If the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal (1st, 2nd, and 3rd) for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.
- Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide.
- Replace the secondary shaft if the bushing for the 1st or the 3rd clutch feed pipe is loose or damaged.
- Inspect the 5th clutch feed pipe. If the 5th clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide.
- Replace the mainshaft if the bushing for the 5th clutch feed pipe is loose or damaged.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Late shift after shifting from N to D and S, or excessive shock when shifted into D and S

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice
Servo control valve defective
1st accumulator defective
1st check ball stuck
Lock-up shift valve defective
1st clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.
- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Check the 1st clutch pressure.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.
- Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.

Late shift after shifting from N to R, or excessive shock when shifted into R

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
Shift cable broken or out of adjustment
Loose or poor connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Shift fork shaft stuck
Foreign material in separator plate orifice
Shift valve E defective
4th/reverse accumulator defective
Lock-up shift valve defective
4th clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.
- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Check for a missing shift fork bolt on the shift fork shaft.
- Check the 4th clutch pressure.
- Inspect the servo valve and the O-ring.

Transmission does not shift

1.
2.

Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective

- Check for a stored DTC, and check for loose connectors.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.

Excessive shock or flares on all upshifts and downshifts

1.
2.
3.
4.
5.
6.

A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.

Excessive shock or flares on 1-2 upshift or 2-1 downshift

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
2nd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
1st accumulator defective
2nd accumulator defective
1st check ball stuck
2nd check ball stuck
Lock-up shift valve defective
1st clutch defective
2nd clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the 1st and the 2nd clutch pressures.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.
- Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.

Symptom | Probable Cause(s) | Notes
--- | --- | ---

Excessive shock or flares on 2-3 upshift or 3-2 downshift

1.
2.
3.
4.
5.
6.
7.
8.
9.

A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
3rd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
2nd accumulator defective
3rd accumulator defective
2nd check ball stuck
2nd clutch defective
3rd clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the 2nd and the 3rd clutch pressures.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide.
- Replace the secondary shaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Excessive shock or flares on 3-4 upshift or 4-3 downshift

1.
2.
3.
4.
5.
6.
7.

A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
3rd accumulator defective
4th/reverse accumulator defective
3rd clutch defective
4th clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the 3rd and the 4th clutch pressures.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer and the retainer seal (3rd) for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 3rd clutch feed pipe. If the 3rd clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide.
- Replace the secondary shaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Excessive shock or flares on 4-5 upshift or 5-4 downshift

1.
2.
3.
4.
5.
6.
7.

A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
4th/reverse accumulator defective
5th accumulator defective
4th clutch defective
5th clutch defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the 4th and the 5th clutch pressures.
- Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage. If the discs are worn or damaged, replace them as a set. Inspect the clutch wave-plate height. If the height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.
- Inspect the 5th clutch feed pipe. If the 5th clutch feed pipe is scored, replace it and the O-ring under the feed pipe guide.
- Replace the mainshaft if the bushing for the 5th clutch feed pipe is loose or damaged.

Noise from transmission in all shift lever positions

1.
2.

ATF pump worn or binding
Mainshaft bearing, countershaft bearing, or secondary shaft bearing defective

- Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure if not detected. Use the proper tools.
- Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
- Inspect the ATF strainer for clogging with particles of steel or aluminum. If the ATF strainer is clogged, replace it, and clean the torque converter, cooler, and lines.
- Inspect the mainshaft, the countershaft, and the secondary shaft for wear or damage.

Vehicle does not accelerate above 50 km/h (31 mph) | Torque converter one-way clutch defective | Replace the torque converter.

Vibration in all shift lever positions

Drive plate defective or transmission misassembled

- Check for a misinstalled/damaged drive plate.
- Check that the idle rpm in gear is the specified idle speed; R20A3 engine model, K24Z3 engine model. If the idle speed is correct, adjust the engine and the transmission mounts.

Shift lever does not operate smoothly

1.
2.
3.

Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn

- Check for a stored DTC, and check for loose connectors.
- Inspect the transmission range switch for operation.
- Check for a loose shift cable at the shift lever and the transmission control shaft.

Transmission does not shift into P

1.
2.
3.

Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Park mechanism defective

- Check for a loose shift cable at the shift lever and the transmission control shaft.
- Check the park pawl spring installation and the park lever spring installation. If installation is incorrect, install the spring correctly. Make sure that the park lever stop is not installed upside down. Check the distance between the park pawl shaft and the park lever roller pin. If the distance is out of tolerance, adjust the distance with the park lever stop.

Torque converter clutch does not disengage

1.
2.
3.
4.
5.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Lock-up shift valve defective
Lock-up control valve defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Replace the torque converter.

Torque converter clutch does not operate smoothly

1.
2.
3.
4.
5.
6.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Replace the torque converter.

Torque converter clutch does not engage

1.
2.
3.
4.
5.
6.
7.
8.

Shift solenoid valve E defective
A/T clutch pressure control solenoid valve A defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Replace the torque converter.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.

A/T gear position indicator does not indicate shift lever positions

1.
2.
3.

Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn

- Check for a stored DTC, and check for loose connectors.
- Inspect the transmission range switch operation.
- Check for a loose shift cable at the shift lever and the transmission control shaft.

Speedometer and odometer do not work

Output shaft (countershaft) speed sensor defective

- Check for a stored DTC, and check for loose connectors.
- Inspect the transmission range switch operation.
- Check the output shaft (countershaft) speed sensor installation.

Engine does not rev to high rpm, and transmission upshifts at low rpm (engine at normal operating temperature) | VTEC rocker arms defective | Check the engine rocker arms.