Front Passenger's Power Lumbar Support Valve Unit Input Test
NOTE: Before testing, make sure the No. E4 (7.5 A) fuse in the passenger's under-dash fuse/relay box is OK.
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the front passenger's power lumbar support valve unit 8P 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 look OK, go to step 4.
4. Reconnect the 8P connector to the valve unit, 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 |
|---|---|---|---|---|
| 5 | GRN | Front passenger's power lumbar support switch (BACKWARD) | Measure the voltage to ground: There should be battery voltage. |
|
| 8 | PNK | Front passenger's power lumbar support switch (FORWARD) | Measure the voltage to ground: There should be battery voltage. |
|
| 6 | YEL | Front passenger's power lumbar support switch (DOWN) | Measure the voltage to ground: There should be battery voltage. |
|
| 7 | PUR | Front passenger's power lumbar support switch (UP) | Measure the voltage to ground: There should be battery voltage. |
|
5. Turn the vehicle to the OFF (LOCK) mode.
6. Disconnect the 8P connector from the valve unit, 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. Faulty front passenger's power lumbar support valve unit; replace the front passenger's power lumbar support assembly .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 4 | RED | Disconnect the front passenger's power lumbar support pump 2P connector | Check for continuity between terminal No. 4 and front passenger's power lumbar support pump 2P connector terminal No. 2: There should be continuity. | An open or high resistance in the wire |
| 1 | YEL | In all power modes | Check for continuity to ground: There should be continuity. |
|
| Disconnect the front passenger's power lumbar support pump 2P connector | Check for continuity between terminal No. 1 and front passenger's power lumbar support pump 2P connector terminal No. 1: There should be continuity. | An open or high resistance in the wire |