Pinpoint Test B: No Power In ACC
Steering Column Switches
Pinpoint Tests
Pinpoint Test B: No Power in ACC
Refer to Wiring Diagram Set 13, Power Distribution/SJB for schematic and connector information. Diagrams By Number
Normal Operation
When the ignition switch is placed in the ACC position fused ignition voltage is sent to Smart Junction Box (SJB) fuse 43 (10A), 45 (5A) and the internal logic of the SJB for ACC circuit monitoring.
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 IGNITION SWITCH
- Carry out the Ignition Switch Component Test.
- Is the ignition switch OK?
Yes
GO to B2.
No
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. TEST the system for normal operation.
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B2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB C2280A.
- Disconnect: Ignition Switch C250.
- Measure the resistance between ignition switch C250-5, 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 B3.
No
REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
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B3 CHECK THE SJB CONNECTORS
- Check SJB C2208A for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: SJB C2208A.
- 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. REFER to Body Control Systems. 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.
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