( TL19E00J54300041953FCAT00 )

Wipers/Washers (Driver's and Passenger's MICU) Input Test

Driver's MICU

1. Turn the ignition switch to LOCK (0).

1. Remove the driver's dashboard undercover, then remove the dashboard lower cover.

1. Disconnect driver's under-dash fuse/relay box connectors F, Q, and R.
   NOTE: All connector views are wire side of female terminals.

1. Inspect the connector and socket terminals to be sure they are all making good contact.
   - If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
   - If the terminals look OK, go to Step 5 .

1. With the connectors still disconnected, make these input tests at the connectors.
   - If any test indicates a problem, find and correct the cause, then recheck the system.
   - If all the input tests prove OK, go to Step 6 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   Q1

   BLK

   Under all conditions

   Check for continuity to ground:
   There should be continuity.

   - Poor ground (G502)
   - An open in the wire

   Q2

   BRN

   Under all conditions

   Check for continuity to ground:
   There should be continuity.

   - Poor ground (G501)
   - An open in the wire

   R2

   BRN

   Under all conditions

   Check for continuity to ground:
   There should be continuity.

   - Poor ground (G501)
   - An open in the wire

   R5

   BLK

   Under all conditions

   Check for continuity to ground:
   There should be continuity.

   - Poor ground (G502)
   - An open in the wire

1. Reconnect the connectors to the driver's under-dash fuse/relay box, turn the ignition switch to ON (II), and make these input tests at the connectors.
   - If any test indicates a problem, find and correct the cause, then recheck the system.
   - If all the input tests prove OK, go to Step 7 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   F4(A/T)

   GRN

   Transmission range switch in P

   Measure the voltage to ground:
   There should be less than 1 V.

   - Poor ground (G101)
   - An open in the wire

   Transmission range switch in any other position than P

   Measure the voltage to ground:
   There should be more than 5 V.

   - Faulty transmission range switch
   - A short to power in the wire

   F20

   LT GRN

   Brake pedal pressed

   Measure the voltage to ground:
   There should be battery voltage.

   - Blown No. 10 (20 A) fuse in the under-hood fuse/relay box
   - Faulty brake pedal position switch
   - An open in the wire

   Brake pedal released

   Measure the voltage to ground:
   There should be no voltage.

   - Faulty brake pedal position switch
   - A short to power in the wire

   F30

   YEL

   Ignition switch ON (II)

   Measure the voltage to ground:
   There should be battery voltage.

   - Blown No. 4 (10 A) fuse in the driver's under-dash fuse/relay box
   - Faulty driver's under-dash fuse/relay box
   - Faulty relay circuit board in the under-hood fuse/relay box
   - A short to ground in the wire

   F7

   ORN

   Ignition switch ON (II)

   Measure the voltage to ground:
   There should be battery voltage.

   - Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box
   - Poor ground (G301)
   - Faulty relay circuit board in the under-hood fuse/relay box
   - An open in the wire

   Attach to ground:
   The wiper motor should run at high speed.

   - Poor ground (G301, G302) [G201]
   - Faulty relay circuit board in the under-hood fuse/relay box
   - Faulty wiper motor
   - An open in the wire

   F8

   YEL/BLU

   Ignition switch ON (II)

   Measure the voltage to ground:
   There should be battery voltage.

   - Blown No. 3-8 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   [ ]: | RHD model

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   R15 · R4

   ORN · BLK

   Wiper switch ON at INT or LO position

   Measure the voltage between the R15 and the R4 terminals:
   There should be less than 1 V.

   - Faulty wiper/washer switch
   - An open in the wire

   Wiper switch OFF

   Measure the voltage between the R15 and the R4 terminals:
   There should be more than 5 V.

   - Faulty wiper/washer switch
   - A short to ground in the wire

   R16 · R4

   WHT · BLK

   Wiper switch ON at LO or HI position

   Measure the voltage between the R16 and the R4 terminals:
   There should be less than 1 V.

   - Faulty wiper/washer switch
   - An open in the wire

   Wiper switch OFF

   Measure the voltage between the R16 and the R4 terminals:
   There should be more than 5 V.

   - Faulty wiper/washer switch
   - A short to ground in the wire

   R17 · R4

   GRN · BLK

   Wiper switch ON at MIST position

   Measure the voltage between the R17 and the R4 terminals:
   There should be less than 1 V.

   - Faulty wiper/washer switch
   - An open in the wire

   Wiper switch OFF

   Measure the voltage between the R17 and the R4 terminals:
   There should be more than 5 V.

   - Faulty wiper/washer switch
   - A short to ground in the wire

   R18 · R4

   YEL · BLK

   Washer switch ON

   Measure the voltage between the R18 and the R4 terminals:
   There should be less than 1 V.

   - Faulty wiper/washer switch
   - An open in the wire

   Washer switch OFF

   Measure the voltage between the R18 and the R4 terminals:
   There should be more than 5 V.

   - Faulty wiper/washer switch
   - A short to ground in the wire

   R1 · R4

   BLU · BLK

   Intermittent dwell timer turned

   Check resistance between the R1 and R4 terminals:
   There resistance should vary between 0 to 1 kΩ.

   - Faulty wiper/washer switch
   - An open in the wire