Wipers/Washers (MICU) Input Test
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
- Before testing, make sure the No. B5 (30 A) *2 fuse in the under-hood fuse/relay box are OK.
- Before testing, make sure the No. C22 (15 A), No. C23 (10 A) *2, and No. C40 (10 A) fuses in the under-dash fuse/relay box are OK.
- Before testing, make sure the No. D1-5 (30 A) and No. D15 (30 A) *1 fuses in the auxiliary under-dash fuse box are OK.
*1: Without keyless access system
*2: With keyless access system
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect under-dash fuse/relay box connectors B, D, H, N, Q, T, and R.
NOTE:
All connector views are shown from the wire side of the female terminals.
Inspect the connectors 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 are OK, go to step 4.
With the connectors still disconnected, do the following input tests:
- 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 5.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| Q29 *1 | BLU | Vehicle ON mode | Connect terminal Q29 to body ground with jumper wire: The windshield wiper motor should run at high speed. |
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| Q29 *2 | BLU | Vehicle ON mode | Connect terminals M2 and Q31, and terminal Q29 to body ground with jumper wires: The windshield wiper motor should run at high speed. |
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| Q24 *1 | PNK | Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 and body ground with jumper wire. | Connect terminal Q24 to body ground with a jumper wire: The windshield wiper motor speed should change from high speed to low speed. |
|
| Q24 *2 | PNK | Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 and body ground with jumper wire. | Connect terminals M2 and Q31, and terminal Q24 to body ground with jumper wires: The windshield wiper motor speed should change from high speed to low speed. |
|
| T4.T8 | RED.PNK | Vehicle ON mode | Connect terminals T4 and R1, and terminal T8 to body ground with jumper wires: The windshield/rear window washer motor should run. |
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| Q39 | WHT | Vehicle ON mode, run the windshield wiper motor by connecting terminal Q29 and body ground with jumper wire. | Use a DVOM to check for continuity to ground. Continuity when wiper running across glass, no continuity when wiper in cowl/park position. |
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| B18.B20 | RED.BRN | Windshield wiper/washer switch (Intermittent dwell time controller) turned ON. | Measure the resistance between terminals B18 and B20: The resistance should vary between 0 to 1 kΩ |
|
*1: Without keyless access system
*2: With keyless access system
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| N40 *1 | BRN | Vehicle ON mode | Connect terminals M4 and N20, and terminal N40 to body ground with jumper wires: The rear window wiper motor should run. |
|
| N40 *2 | BRN | Vehicle ON mode | Connect terminals M2 and N20, terminals R1 and H19, and terminal N40 to body ground with jumper wires: The rear window wiper motor should run. |
|
*1: Without keyless access system
*2: With keyless access system
Reconnect the connectors to the under-dash fuse/relay box, and do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| R1 | RED | In all power modes | Measure the voltage to ground: There should be battery voltage. |
|
| H19 *1 | GRN | In all power modes | Measure the voltage to ground: There should be battery voltage. |
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| N20 *1 | YEL | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
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| D23 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
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| H1 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
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| N6 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| N38 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
*1: With keyless access system
*2: CVT
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| Q11 | RED | Brake pedal pressed | Measure the voltage to ground: There should be battery voltage. |
|
| Brake pedal released | Measure the voltage to ground: There should be no voltage. |
|
||
| B8.B20 | TAN.BRN | Windshield wiper/washer switch (INT or LO) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Windshield wiper/washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
||
| B15.B20 | GRN.BRN | Windshield wiper/washer switch (MIST) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Windshield wiper/washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
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| B16.B20 | WHT.BRN | Windshield wiper/washer switch (LO or HI) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Windshield wiper/washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
||
| B9.B20 | YEL.BRN | Windshield washer switch ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Windshield washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
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| B6.B20 | LT BLU.BRN | Rear window wiper/washer switch (INT) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Rear window wiper/washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
*1: With keyless access system
*2: CVT
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| B17.B20 | PNK.BRN | Rear window wiper/washer switch ON | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Rear window wiper/washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
||
| B7.B20 | BLU.BRN | Rear window washer switch ON | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Rear window washer switch OFF | Measure the voltage to ground: There should be about 5 V. |
|
||
| Q22 *2 | RED | Transmission range switch in P | Measure the voltage to ground: There should be less than 0.2 V. |
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| Transmission range switch in any other position than P | Measure the voltage to ground: There should be about 5 V. |
|
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| Q23 *2 | PUR | Transmission range switch in R | Measure the voltage to ground: There should be less than 0.2 V. |
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| Transmission range switch in any other position than R | Measure the voltage to ground: There should be about 5 V. |
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*1: With keyless access system
*2: CVT