Power & Ground Circuits
- Turn ignition switch to OFF position. Using ohmmeter, backprobe TCU connector. Connect positive ohmmeter lead to terminal No. 15 and negative lead to ground. If continuity does not exist, inspect TCU harness circuit and repair or replace as needed.
- Using voltmeter, backprobe between appropriate TCU connector terminals with ignition switch in specified position. See TCU POWER CIRCUIT TEST table. If voltage is not as specified, inspect TCU harness circuit and repair or replace as needed.
TCU POWER CIRCUIT TEST
| TCU Terminals No. | Ignition Switch Position | Battery Voltage |
|---|---|---|
| 9 & 15 | OFF | Yes |
| 2 & 15; 5 & 15 | OFF | No |
| 2 & 15; 5 & 15; 9 & 15 | ON | Yes |
| 2 & 15; 9 & 15 | ACC | Yes |
| 5 & 15 | ACC | No |