Power & Ground Circuits
- Turn ignition 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 TCU connector terminals listed in TCU POWER CIRCUIT TEST table with ignition switch in specified position. If voltage is not as specified, inspect TCU harness circuit and repair or replace as needed.
TCU POWER CIRCUIT TEST
| TCU Terminal Nos. | 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 |