Second Row Seat Heater 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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS) .
- Before testing, make sure the No. B16 and No. D1 fuses are OK.
1. Disconnect the second row seat heater control unit 14P connector.
Second Row Seat Heater Control Unit 14P Connector (female terminals)
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 3.
Reconnect the 14P connector to the control 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, go to step 4.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 2 | PNK | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 9 | GRN* 1LT GRN* 2 | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 14 | BRN | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| 4 | BRN | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
*1: With second row seat (captain)*2: With second row seat (bench)
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 1 | RED | Vehicle ON mode, left second row seat heater switch pressed | Measure the voltage to ground: There should be battery voltage. |
|
| 3 | LT BLU | Vehicle ON mode, right second row seat heater switch pressed | Measure the voltage to ground: There should be battery voltage. |
|
*1: With second row seat (captain)*2: With second row seat (bench)
4. Turn the vehicle to the OFF (LOCK) mode.Disconnect the 14P connector from the control 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, the control unit must be faulty; replace it .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 7 | PUR | Under all conditions | Check for continuity between terminals No. 7 and No. 13:There should be continuity. |
|
| 13 | WHT | |||
| 6 | GRN | Under all conditions | Check for continuity between terminals No. 6 and No. 12: There should be continuity. |
|
| 12 | BRN |