Pinpoint Test C: No Power In RUN

Steering Column Switches

Pinpoint Tests

Pinpoint Test C: No Power in RUN

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 RUN position, fused ignition voltage is sent to the Smart Junction Box (SJB) and the Battery Junction Box (BJB) along circuit CE612 (GY/VT).

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



PINPOINT TEST C: NO POWER IN RUN

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 greater than 10 volts.

-------------------------------------------------
C1 CHECK THE IGNITION SWITCH


- Carry out the Ignition Switch Component Test.

- Is the ignition switch OK?

Yes
GO to C2.

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

-------------------------------------------------
C2 CHECK THE RUN CIRCUIT FOR AN OPEN


- Disconnect: SJB C2280A.
- Disconnect: SJB C2280E.
- Disconnect: PCM Diode.
- Disconnect: BJB Fuse 39 (5A).
- Disconnect: BJB Fuse 45 (5A).
- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and SJB C2280B-45, circuit CE612 (GY/VT), harness side.




- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and SJB C2280E-1, circuit CE612 (GY/VT), harness side.




- Measure the resistance between ignition switch C250-7, circuit CE612 (GY/VT), harness side and:
- BJB PCM diode, circuit CE612 (GY/VT), input side.
- BJB fuse 39, circuit CE612 (GY/VT), input side.
- BJB fuse 45, circuit CE612 (GY/VT), input side.




- Are the resistances less than 5 ohms?

Yes
GO to C3.

No
REPAIR circuit CE612 (GY/VT). TEST the system for normal operation.

-------------------------------------------------
C3 CHECK THE RUN CIRCUIT FOR A SHORT TO GROUND


- Measure the resistance between ignition switch C250-1, circuit CE612 (GY/VT), harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to C4.

No
REPAIR circuit CE612 (GY/VT). TEST the system for normal operation.

-------------------------------------------------
C4 CHECK FOR CORRECT SJB OPERATION


- Check SJB C2280A and C2280E for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: Ignition Switch C250.
- Connect: PCM Diode.
- Connect: BJB Fuse 39 (5A).
- Connect: BJB Fuse 45 (5A).
- Connect: SJB C2280A.
- Connect: SJB C2280E.
- Make sure the connector seats 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. REPEAT the self-test.

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.

-------------------------------------------------