Rear Seat Heater Control Unit Input Test
NOTE:
- Make sure the fuses associated with the system are OK.
- Before testing, do the seat heater control unit self-diagnostic function , and make sure the seat heater function is OK.
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the rear seat heater control unit 24P connector.
Rear Seat Heater Control Unit 24P Connector (female terminals)
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 rear seat heater control unit 24P 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 5.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 2 | WHT | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 14 | PUR* 1RED* 2 | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. | An open or high resistance in the wire |
| 4 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| 1 | PNK | Vehicle ON mode, left rear seat heater ON mode | Measure the voltage to ground: There should be battery voltage. |
|
*1: With auto idle stop system
*2: Without auto idle stop system
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 3 | LT GRN | Vehicle ON mode, right rear seat heater ON mode | Measure the voltage to ground: There should be battery voltage. |
|
*1: With auto idle stop system
*2: Without auto idle stop system
5. Turn the vehicle to the OFF (LOCK) mode. Disconnect the rear seat heater control unit 24P 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 rear seat heater control unit .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 15 | GRN | Disconnect the front seat heater control unit 24P connector | Check for continuity between terminal No. 15 and front seat heater control unit 24P connector terminal No. 15: There should be continuity. | An open or high resistance in the wire |
| Check for continuity to ground: There should be no continuity. | A short to ground in the wire | |||
| 12 | TAN | Under all conditions | Check for continuity between terminals No. 12 and No. 22: There should be continuity. |
|
| 22 | LT BLU | |||
| 13 | PNK | Under all conditions | Check for continuity between terminals No. 13 and No. 23: There should be continuity. |
|
| 23 | YEL |