Cruise Control System

DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2


DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2

1.CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors and connect them securely again. Erase DTC, then perform self-diagnosis of ICC system again.
Does the DTC reset?
YES - GO TO 2
NO - � Poor connector connection.
- Check connector. Check connector housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair as as necessary. Erase DTC and perform ICC system running test. Refer to Action Test.
2.CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT





1. Turn ignition switch ON.
2. Check voltage between ICC unit harness connector B17 terminals 33, 42 and ground.

Battery voltage should exist.

Does battery voltage exist?
YES - GO TO 3
NO - � Repair ICC unit power supply harness.
- Erase DTC and perform ICC system running test. Refer to Action Test, "ACTION TEST : ICC System Run-
ning Test".
3.CHECK GROUND CIRCUIT FOR ICC UNIT





1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors.
3. Check continuity between ICC unit harness connector B13 terminals 19, 20, and connector B17 terminal 46 and ground.

Continuity should exist.

Does continuity exist?
YES - Replace ICC unit. Refer to ICC C/U . Erase
DTC and perform ICC system running test. Refer to Action Test .
NO - � Repair ICC unit ground harness.
- Erase DTC and perform ICC system running test. Refer to Action Test .