Pinpoint Test D: DTC B1363

Steering Column Switches

Pinpoint Tests

Pinpoint Test D: DTC B1363

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

Normal Operation

When placed in START, the ignition switch provides voltage to the Smart Junction Box (SJB) on circuit CDC35 (BU/WH).

- DTC B1363 (Ignition START Circuit Failure) - If the SJB detects an open circuit, a short to voltage or a short to ground on the START circuit, DTC B1363 will be set.

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



PINPOINT TEST D: B1363

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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D1 RETRIEVE THE SJB DTCs


- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self Test.
- Record DTCs.
- Is DTC B1363 present?

Yes
GO to D2.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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D2 CHECK CIRCUIT CDC35 (BU/WH) FOR AN OPEN OR A SHORT TO GROUND


- Ignition OFF.
- Disconnect: SJB C2280c.
- Disconnect: Ignition Switch C250.
- Measure resistance between:
- ignition switch C250-7, circuit CDC35 (BU/WH), harness side and SJB C2280c-19, circuit CDC35 (BU/WH), harness side.
- ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.




- Is the resistance less than 5 ohms between the components, and greater than 10,000 ohms to ground?

Yes
GO to D3.

No
REPAIR circuit CDC35 (BU/WH). CLEAR the DTCs. REPEAT the self-test.

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D3 CHECK THE IGNITION SWITCH


- Carry out the Ignition Switch Component Test.

- Is the ignition switch OK?

Yes
GO to D4.

No
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. CLEAR the DTCs. REPEAT the self-test.

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D4 CHECK FOR CORRECT SJB OPERATION


- Inspect the SJB connectors.
- Check for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all the SJB connectors and make sure they seat correctly.
- 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.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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