Honda Pilot: Moonroof Motor-Control Unit Input Test
Honda Pilot 2016-2022 (YF5/YF6) Service Manual / Parts Test Info / Moonroof Motor-Control Unit Input Test
NOTE:
- Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
- 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. C14 (20 A) fuse in the under-dash fuse/relay box is OK.
- If the moonroof works OK manually, but will not work in AUTO, or reverses frequently (obstacle detection), reset the moonroof control unit before proceeding with the input test.
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the moonroof control unit/motor 14P connector.
3. 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 4.
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 |
| 12 | WHT | Disconnect these
connectors:
|
Check for continuity between terminal No. 12 and power window master switch 37P connector terminal No. 36: There should be continuity. | An open in the LIN (WINDOW) wire |
| Check for continuity between terminal No. 12 and front passenger's power window switch 24P connector terminal No. 24: There should be continuity. | An open in the LIN (WINDOW) wire | |||
| Check for continuity to ground: There should be no continuity. | A short to ground in the LIN (WINDOW) wire |
5. 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, replace the moonroof motor-control unit.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
| 1 | GRN | Under all conditions | Measure the voltage to ground: There should be battery voltage. |
|
| 4 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| 9 | BLU | Vehicle ON mode, moonroof switch in CLOSE position | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Vehicle ON mode, moonroof switch released | Measure the voltage to ground: There should be battery voltage. |
|
||
| 8 | YEL | Vehicle ON mode, moonroof switch in TILT position | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Vehicle ON mode, moonroof switch released | Measure the voltage to ground: There should be battery voltage. |
|
||
| 7 | ORN | Vehicle ON mode, moonroof switch in OPEN position | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Vehicle ON mode, moonroof switch released | Measure the voltage to ground: There should be battery voltage. |
|
||
| 14 | LT BLU | Vehicle ON mode, moonroof switch in AUTO (OPEN) or AUTO (CLOSE) position | Measure the voltage to ground: There should be less than 0.2 V. |
|
| Vehicle ON mode, moonroof switch released | Measure the voltage to ground: There should be battery voltage. |
|
Honda Pilot 2016-2022 (YF5/YF6) Service Manual
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