Reminder Systems (MICU and Gauge Control Module) 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, do the gauge control module self-diagnostic function to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
- Before testing, make sure the No. B21 (10 A) fuse in the under-hood fuse/relay box are OK.
- Before testing, make sure the No. C34 (7.5 A) fuse in the under-dash fuse/relay box is OK.
MICU
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect under-dash fuse/relay box connectors B, D, H, N, and Q.
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 |
|---|---|---|---|---|
| N23 | BRN | Driver's door open | Measure the voltage to ground: There should be less than 0.2 V. |
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| Driver's door closed | Measure the voltage to ground: There should be about 5 V. |
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| D4* 1 | PNK | Ignition key inserted into the ignition key cylinder | Measure the voltage to ground: There should be less than 0.2 V. |
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| Ignition key removed from the ignition key cylinder | Measure the voltage to ground: There should be about 5 V. |
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| D4* 2 | PNK | Disconnect keyless access control unit connector A (32P) | Check for continuity between terminal D4 and keyless access control unit connector A (32P) terminal No. 2:There should be continuity. | An open or high resistance in the wire |
| B4. B10 | BRN. GRY | Combination light switch OFF | Measure the voltage to ground: There should be less than 0.2 V. |
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| Combination light switch in any position other than OFF | Measure the voltage to ground: There should be about 5 V. |
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| B5. B10 | GRY. GRY | Combination light switch (PARKING position) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Combination light switch OFF | Measure the voltage to ground: There should be about 5 V. |
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| B11. B10 | WHT. GRY | Combination light switch (headlight) ON | Measure the voltage to ground: There should be less than 0.2 V. |
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| Combination light switch OFF | Measure the voltage to ground: There should be about 5 V. |
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*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, go to step 6.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| Q15 | RED | In all power modes | Measure the voltage to ground: There should be battery voltage. |
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| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 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. |
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| N38 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
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Gauge Control Module
6. Turn the vehicle to the OFF (LOCK) mode.
7. Disconnect the gauge control module 32P connector
.
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 are OK, go to step 9.
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 10.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 4 | BLU | Disconnect the electric parking brake control unit 30P connector | Check for continuity between terminal No. 4 and electric parking brake control unit 30P connector terminal No. 17:There should be continuity. |
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Reconnect the connector, 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, go to step 11.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 16 | RED | Under all conditions | Measure the voltage to ground: There should be battery voltage. |
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| 15 | LT GRN | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
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| 17 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
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11. If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the gauge control module .