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NO.5 ENGINE STALLS-AFTER START/AT IDLE

BHE010300103W07

5 | ENGINE STALLS-AFTER START/AT IDLE
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DESCRIPTION | • The engine stops unexpectedly.
POSSIBLE CAUSE | • No battery power supply to PCM or poor GND • Vacuum leakage • Air leakage from intake-air system parts • Air suction at intake-air system (between MAF sensor and intake ports) • Air cleaner restriction • Improper operation of drive-by-wire control system • Throttle body malfunction (stuck open) • Throttle body malfunction (stuck closed) • Poor fuel pressure • Inadequate fuel pressure • Pressure regulator malfunction (integrated in fuel pump unit) • Fuel pump body mechanical malfunction • Fuel pump resister malfunction (open) • Fuel leakage from fuel injector • Fuel injector (FP1) (RP1) clogging • Jet air mixing system malfunction (restriction or leakage at air passage) • Open or short circuit in fuel pump body and related wiring harness • Restriction in exhaust system • Purge solenoid valve malfunction (stuck open) • Improper air/fuel ratio control (abnormal signal from ECT sensor to PCM) • MAF sensor improper installation • No signal from eccentric shaft position sensor due to sensor, related wire or wrong installation • Electrical connector disconnected • Low engine compression – Engine internal malfunction – Abnormal engine oil condition (viscosity, amount, deterioration) – Low oil pressure – Excessive fuel pressure – Air mixed in oil line – Metering oil pump malfunction • Leakage or clogging in oil pipe • Leakage or clogging in oil nozzle • A/C system operation is improper • Engine overheating • Abnormal engine oil condition (viscosity, amount, deterioration) • Spark leakage from high-tension leads • Ignition coil malfunction • Immobilizer system and/or circuit malfunction • Immobilizer system operates properly (Key is not registered.) Warning The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE.) (See AFTER REPAIR PROCEDURE.) Caution • Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP | INSPECTION | RESULTS | ACTION
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1 | Note • The following test should be performed for the vehicles with the immobilizer system. Go to Step 8 for the vehicles without the immobilizer system. Connect the WDS or equivalent to the DLC-2. Do the following conditions appear? • The engine is not completely started. • DTC B1260 is displayed. | Yes | Both conditions appear: Go to Step 3.
No | Either or other condition appears: Go to the next step.
2 | Does the engine stall after approx. 2 s after the engine is started? | Yes | Go to the next step.
No | The immobilizer system is normal. Go to Step 8.
3 | Is the coil connector securely connected to the coil? | Yes | Go to the next step.
No | Connect the coil connector securely. Return to Step 2.
4 | Does the security light illuminate? | Yes | Go to the next step.
No | Inspect the instrument cluster and the following wiring harness. • Between PCM terminal 4V and instrument cluster terminal 1J • Between PCM terminal 4S and instrument cluster terminal 1L
5 | Connect the WDS or equivalent to the DLC-2 and retrieve the keyless unit DTC. Are any of the following DTCs displayed? DTC B1213, B1341, B1600, B1602, B1681, B2103, B2139, B2431, U1147, U2510 | Yes | Go to the applicable DTC inspection. (See DTC TABLE (IMMOBILIZER SYSTEM).) (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)
No | Go to the next step.
6 | Inspect the following wiring harnesses and connectors for an open or short circuit: • Between coil terminal A and keyless unit terminal 3F • Between coil terminal B and keyless unit terminal 3E Are there any malfunctions? | Yes | Repair or replace the wiring harnesses and connectors.
No | Go to the next step.
7 | Inspect the following wiring harnesses and connectors for an open or short circuit: • Between keyless unit terminal 3A and PCM terminal 4V • Between keyless unit terminal 3B and PCM terminal 4S Are there any malfunctions? | Yes | Repair or replace the wiring harnesses and connectors.
No | Go to the next step.
8 | Does the engine knock/ping/detonate? | Yes | Go to the symptom troubleshooting "No.13 Knocking/pinging/detonation-Acceleration/cruise". (See NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE.)
No | Go to the next step.
9 | Verify the following: • Vacuum connection • Air cleaner element • No air leakage from intake-air system • Blockage at intake-air system (between MAF sensor and intake ports) • No restriction of intake-air system • Proper sealing of intake manifold • Jet air mixing system air passage (clogging or leakage) • Ignition wiring • MAF sensor installation • Fuel quality: proper octane, contamination, winter/summer blend • Electrical connections • Smooth operation of throttle valve Are all the items normal? | Yes | Go to the next step.
No | Service if necessary. Repeat Step 9.
10 | Connect the WDS or equivalent to the DLC-2. Retrieve any continuous memory, KOEO and KOER DTCs. If engine stalls, retrieve continuous memory and KOEO DTCs. Are there any DTCs displayed? | Yes | DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE.) Communication error message is displayed: Inspect for the following: • Open circuit between main relay and PCM terminal 5AC or 5AF • Open main relay GND circuit • Main relay is stuck open. • Open or poor GND circuit (PCM terminal 4A, 4J, 5T, 5D, 5O or 5R) • Poor connection of vehicle body GND
No | No DTC is displayed: Go to the next step.
11 | Connect the WDS or equivalent to the DLC-2. Access the APP PID. Crank the engine with the accelerator pedal released. Is the APP PID indicating that the accelerator pedal is in the released position? | Yes | Go to the next step.
No | Inspect for the following: • APP sensor • Wiring harnesses and connectors between PCM and APP sensor – PCM terminal 4Y-APP sensor terminal D – PCM terminal 5F-APP sensor terminal F – PCM terminal 5AE-APP sensor terminal E – PCM terminal 4X-APP sensor terminal A – PCM terminal 5C-APP sensor terminal C – PCM terminal 5AB-APP sensor terminal B
12 | Connect the WDS or equivalent to the DLC-2. Access the TP_REL PID. Crank the engine with the accelerator pedal released. Does TP_REL PID indicate the closed throttle position? | Yes | Go to the next step.
No | Inspect for the following: • TP sensor • Wiring harnesses and connectors between PCM and throttle body – PCM terminal 1Q-throttle body terminal E – PCM terminal 1J-throttle body terminal F – PCM terminal 2F-throttle body terminal C – PCM terminal 1M-throttle body terminal D
13 | Access the ECT PID. Does the ECT PID indicate the properly engine coolant temperature? (See PCM INSPECTION.) | Yes | Go to the next step.
No | Inspect the following: • ECT sensor • Open or short circuit between ECT sensor and PCM terminal 2K or 1U
14 | Attempt to start the engine at part throttle. Does the engine run smoothly at part throttle? | Yes | Inspect the drive-by-wire control system operation. (See Drive-by-wire Control System Inspection.)
No | Go to the next step.
15 | Connect the WDS or equivalent to the DLC-2. Access the RPM PID. Does RPM PID indicate the engine speed during the engine cranking? | Yes | Go to the next step.
No | Inspect for the following: • Open or short circuit in the eccentric shaft position sensor • Open or short circuit between the eccentric shaft position sensor and PCM terminal 2U or 2X • Open or short circuit in the eccentric shaft position sensor harnesses If the eccentric shaft position sensor and the wiring harness are normal, go to the next step.
16 | Visually inspect the eccentric shaft position sensor and the teeth of the pulse wheel. Are the eccentric shaft position sensor and the teeth of the pulse wheel normal? | Yes | Go to the next step.
No | Replace the malfunctioning parts.
17 | Inspect for cracks on the high-tension leads. Are there any cracks on the high-tension leads? | Yes | Repair the suspected high-tension leads.
No | Go to the next step.
18 | Is a strong blue spark visible at each disconnected high-tension lead while cranking the engine? | Yes | Go to the next step. If the symptom occurs with the A/C on, go to Step 26.
No | Inspect for the following: • Open or short circuit in ignition coil • Open circuit in high-tension leads • Open circuit between ignition coil connector GND terminal and body GND • Open circuit between ignition switch and ignition coil • Open circuit between ignition coil terminal C and PCM terminal 2Z, 2AA, 2AC or 2AD
19 | Inspect the spark plug condition. Is the spark plug wet, covered with carbon or grayish white? | Yes | Spark plug is wet or covered with carbon: Inspect for fuel leakage from injector. Spark plug is grayish white: Inspect for clogged fuel injector (FP1) (RP1).
No | Install the spark plugs on the original positions. Go to the next step.
20 | Perform the fuel pump speed control operation inspection. (See Fuel Pump Speed Control Operation Inspection.) Does the fuel pump speed control operate properly? | Yes | Go to the next step.
No | Repair or replace the malfunctioning parts, according to the fuel pump speed control operation inspection results.
21 | Install the fuel pressure gauge to the fuel line quick release connector. Short the check connector terminal F/P to the body GND using a jumper wire. Turn the ignition switch to the ON position. Is the fuel line pressure correct with the ignition switch ON? (See FUEL LINE PRESSURE INSPECTION.) | Yes | Go to the next step.
No | Zero or low: Inspect the fuel pump relay and the fuel pump circuit. Inspect the fuel pump resister. Inspect for clogged fuel line. If normal, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.)
22 | Visually inspect for fuel leakage at the fuel injector O-ring and the fuel line. Service if necessary. Is the fuel line pressure held after the ignition switch is turned off? (See FUEL LINE PRESSURE INSPECTION.) | Yes | Go to the next step.
No | Inspect the fuel injector. (See FUEL INJECTOR INSPECTION.) If the fuel injector is normal, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.)
23 | Note • The following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step. Connect the pressure gauges to the A/C low and high pressure side lines. Turn the A/C on and measure the low side and high side pressures. Are pressures within the specifications? (See REFRIGERANT PRESSURE CHECK.) | Yes | Go to the next step.
No | If the A/C is always on, go to the symptom troubleshooting "No.24 A/C is always on or A/C compressor runs continuously". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY.) For other symptoms, inspect the following: • Refrigerant charging amount • Condenser fan operation
24 | Disconnect the vacuum hose between the purge solenoid valve and the intake manifold at the quick release connector. Plug the opening end of the vacuum hose. Start the engine. Is the engine stall now eliminated? | Yes | Inspect if the purge solenoid valve is sticks open. Inspect the evaporative emission control system.
No | Go to the next step.
25 | Perform the SSV operation inspection. (See Secondary Shutter Valve (SSV) Operation Inspection.) Does the SSV operate properly? | Yes | Go to the next step.
No | Repair or replace the malfunctioning parts, according to the SSV operation inspection results.
26 | Note • The following test is for 13B-MSP (High Power). Go to the next step for 13B-MSP (Standard Power). Perform the APV control inspection. (See Auxiliary Port Valve (APV) Control Inspection.) Does the APV control operate properly? | Yes | Go to the next step.
No | Repair or replace the malfunctioning parts, according to the APV control inspection results.
27 | Is air leakage felt or heard at intake-air system components while racing the engine to a higher speed? | Yes | Repair or replace the malfunctioning parts.
No | Inspect the engine compression. (See COMPRESSION INSPECTION.)
28 | Check the oil pipe between the metering oil pump and the metering oil nozzle. Is there any air and/or clogging in the oil pipe? | Yes | Inspect and repair for leakage and/or clogging in the oil passage at the engine.
No | Go to the next step.
29 | Perform the fuel injector operation inspection. (See Fuel Injector Operation Inspection.) Does the fuel injector operate properly? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part according to inspection result.
30 | Inspect the fuel injectors for the following: (See FUEL INJECTOR INSPECTION.) • Leakage • Clogging • Injector amount Are the injectors normal? | Yes | Go to the next step.
No | Replace the suspected fuel injector.
31 | Inspect the engine compression. (See COMPRESSION INSPECTION.) Is it normal? | Yes | Inspect the following: • Exhaust system (restriction) • Engine oil condition (viscosity, amount, deterioration)
No | Go to the next step.
32 | Perform the metering oil pump control inspection. (SeeMetering Oil Pump Control Inspection.) Does the metering oil pump control operate properly? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part according to the inspection results. After that overhaul or replace the engine. (See Engine Workshop Manual.)
33 | Check the engine oil condition. Is the engine oil low viscosity and/or is there a gasoline odor? | Yes | Replace the engine oil. Inspect the ECT sensor and the related wiring harnesses. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION.) After that overhaul or replace the engine. (See Engine Workshop Manual.)
No | Go to the next step.
34 | Inspect the oil pressure. (See OIL PRESSURE INSPECTION.) Is the oil pressure within the specification? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part according to the inspection results. After that overhaul or replace the engine. (See Engine Workshop Manual.)
35 | Turn the ignition switch off. Disconnect the fuel line quick release connector and install the fuel gauge to the fuel line. Start the engine and run it at idle. Measure the fuel line pressure at idle. Is the fuel line pressure correct at idle? (See FUEL LINE PRESSURE INSPECTION.) | Yes | Go to the next step.
No | Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.) After that overhaul or replace the engine. (See Engine Workshop Manual.)
36 | Check the oil pipe between the metering oil pump and the metering oil nozzle. Is there any air and/or clogging in the oil pipe? | Yes | Inspect and repair for leakage and/or clogging in the oil passage at the engine. After that overhaul or replace the engine. (See Engine Workshop Manual.)
No | Overhaul or replace the engine. (See Engine Workshop Manual.)
37 | Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. • If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.