Pinpoint Test B: No Power In ACC

Steering Column Switches

Pinpoint Tests

Pinpoint Test B: No Power in ACC

Normal Operation

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

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ignition switch
- SJB



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 multi-meter probes.

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B1 CHECK THE ACC CIRCUIT FOR AN OPEN


NOTE: To access the SJB connector, the floor console must be removed.

- Ignition OFF.
- Disconnect: SJB C2280A.
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB C2280A-3 circuit CDC33 (VT/GN), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to B2.

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

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B2 CHECK THE 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 B3.

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

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B3 CHECK THE IGNITION SWITCH


- Carry out the Ignition Switch - Electrical Component Test.

- Is the ignition switch OK?

Yes
GO to B4.

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

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B4 CHECK FOR CORRECT SJB OPERATION


- Check SJB C2280A for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: SJB C2280A.
- Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

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