Pinpoint Test A: No Power In All Ignition Switch Positions - Vehicles With An Ignition Switch

Steering Column Switches

Pinpoint Test A: No Power in All Ignition Switch Positions - Vehicles With an Ignition Switch

Refer to Wiring Diagram Set 13, Power Distribution for schematic and connector information. Diagrams By Number

Normal Operation

The ignition switch receives fused battery voltage from Central Junction Box (CJB) fuse 1 (15A). The ignition switch distributes this voltage to the PCM and/or the CJB depending on the ignition switch position.

This pinpoint test is intended to diagnose the following:

- CJB fuse
- Battery Junction Box (BJB) fuse
- Wiring, terminals or connectors
- Ignition switch

PINPOINT TEST A: NO POWER IN ALL IGNITION SWITCH POSITIONS - VEHICLES WITH AN IGNITION SWITCH

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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A1 CHECK FOR POWER TO CJB FUSE 1 (15A)

- Disconnect: CJB Fuse 1 (15A).
- Measure the voltage between CJB fuse 1 (15A), circuit SBP01 (RD), input side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY BJB fuse 5 (60A) is OK. If OK, REPAIR circuit SBB05 (GY/RD). If not OK, REFER to the Wiring Diagrams to identify the possible cause of the circuit short. TEST the system for normal operation. Diagrams By Number

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A2 CHECK CJB FUSE 1 (15A)

- Check fuse: CJB fuse 1 (15A).
- Is the resistance less than 5 ohms?

Yes
GO to A3.

No
REFER to the Wiring Diagrams to identify the possible cause of the circuit short. TEST the system for normal operation. Diagrams By Number

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A3 CHECK FOR POWER TO THE IGNITION SWITCH

- Connect: CJB Fuse 1 (15A).
- Disconnect: Ignition Switch C250.
- Measure the voltage between ignition switch C250-4, circuit SBP01 (RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. TEST the system for normal operation.

No
VERIFY in-line connector C212 is OK. If not OK, REPAIR as necessary.

If OK, REPAIR circuit SBP01 (RD). TEST the system for normal operation.

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