Pinpoint Test B: No Power in ACC

Steering Column Switches

Pinpoint Test B: No Power in ACC

Refer to Wiring Diagram Set 13, Power Distribution/SJB for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

When the ignition switch is placed in the ACC position, fused ignition voltage is sent to the Smart Junction Box (SJB) through circuit CDC33 (VT/GN).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

- SJB (Smart Junction Box)

PINPOINT TEST B : NO POWER IN ACC

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

NOTE: Verify that battery voltage is 10 volts or greater.

B1 CHECK THE IGNITION SWITCH

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Carry out the Ignition Switch component test. Component Tests and General Diagnostics

Did the ignition switch pass the component test?

Yes
GO to B2.

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

B2 CHECK THE IGNITION ACC CIRCUIT FOR AN OPEN

- Disconnect: SJB (Smart Junction Box) C2280A.

- Measure the resistance between ignition switch C250-6, 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 B3.

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

B3 CHECK THE IGNITION ACC CIRCUIT FOR A SHORT TO GROUND

- Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to B4.

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

B4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Check SJB (Smart Junction Box) C2208A for:
- corrosion.
- pushed-out pins.
- spread terminals.


- Connect: SJB (Smart Junction Box) C2280A and make sure the connector is seated correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

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

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.