Test 1: Power Source Circuit
- Check CC ECU-IG fuse and replace if faulty. If fuse is okay, go to next step. If fuse failure is continuous, turn ignition off and disconnect Cruise Control Electronic Control Unit (CC ECU) wire harness connector. Install NEW fuse. Turn ignition on and check fuse. If fuse fails, check for short in wire harness between CC ECU-IG fuse and CC ECU. If fuse is okay, replace CC ECU and retest.
- Turn ignition off and disconnect CC ECU wire harness connector. Ensure continuity exists between CC ECU ground terminal and body ground. See CC ECU CONNECTOR GROUND & POWER TERMINAL IDENTIFICATION table. If continuity is not present, repair open in circuit. If continuity is present, go to next step.
- Turn ignition on. Measure voltage between power terminal and ground. See CC ECU CONNECTOR GROUND & POWER TERMINAL IDENTIFICATION table. If battery voltage is not present, repair open in circuit. If battery voltage is present, replace CC ECU and retest system.
CC ECU CONNECTOR GROUND & POWER TERMINAL IDENTIFICATION
| Application Type | Ground Terminal (Wire Color) | Power Terminal (Wire Color) |
|---|---|---|
| Land Cruiser | 13 (BRN) | 14 (BLK/WHT) |