Pinpoint Test B: No Power in ACC

Steering Column Switches

Pinpoint Test B: No Power in ACC

Normal Operation

When placed in the ACC position, the ignition switch provides fused ignition voltage to the Smart Junction Box (SJB) along circuit CDC33 (VT/OG).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Fuse

- Ignition switch

- SJB (Smart Junction Box)

PINPOINT TEST B : NO POWER IN ACC

B1 CHECK THE IGNITION SWITCH

- Carry out the Ignition Switch- Electrical Component Test.

Does the ignition switch test OK?

Yes
GO to B2.

No
INSTALL a new ignition switch. REFER to Ignition Switch Service and Repair. TEST the system for normal operation.

B2 CHECK THE ECU DERIVED IGNITION STATE-ACC (IGN_A_ECU) PID

- Connect the scan tool.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- SJB (Smart Junction Box).

- Monitor the IGN_A_ECU PID while placing the ignition switch in the ACC position.

Does the PID match the switch position?

Yes
The condition is not present at this time. INSPECT ignition switch C250 and SJB (Smart Junction Box) C2280A for corrosion, pushed-out pins and/or spread terminals. REPAIR as necessary. TEST the system for normal operation.

No
GO to B3.

B3 CHECK THE SJB (Smart Junction Box) ACC INPUT FOR AN OPEN

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Disconnect: SJB (Smart Junction Box) C2280A.

- Measure the resistance between ignition switch C250-3, circuit CDC33 (VT/GN), harness side and SJB (Smart Junction Box) C2280A-3, circuit CDC33 (VT/GN), harness side.





Is the resistance less than 5 ohms?

Yes
GO to B4.

No
REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.

B4 CHECK THE SJB (Smart Junction Box) ACC INPUT FOR A SHORT TO GROUND

- Measure the resistance between ignition switch C250-3, circuit CDC33 (VT/GN), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

No
REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.