Pinpoint Test E: DTC B2A20

Steering Column Switches

Pinpoint Tests

Pinpoint Test E: DTC B2A20

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

Normal Operation

The Smart Junction Box (SJB) continuously monitors the ignition switch state. The ignition switch is spring loaded to automatically return to the RUN position after being placed in the START position.

- DTC B2A20 (Ignition Stuck in START) - If the SJB receives a start signal for more than 30 seconds, DTC B2A20 will be set.

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

PINPOINT TEST E: DTC B2A20

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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E1 CHECK THE IGNITION SWITCH


- Ignition OFF.
- Disconnect: Ignition Switch C250.
- Carry out the Ignition Switch Component Test.
Refer to Wiring Diagrams for component testing. Diagrams By Number

- Is the ignition switch OK?

Yes
GO to E2.

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

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E2 CHECK THE IGNITION START CIRCUIT FOR A SHORT TO VOLTAGE


- Disconnect: SJB C2280E.
- Measure the voltage between ignition switch C2280E-8, circuit CDC38 (WH/VT), harness side and ground.




- Is any voltage present?

Yes
GO to E3.

No
GO to E7.

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E3 ISOLATE THE SHORT TO VOLTAGE


- Disconnect: Start diode.
- Measure the voltage between ignition switch C2280E-8, circuit CDC38 (WH/VT), harness side and ground.




- Is any voltage present?

Yes
GO to E4.

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

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E4 CHECK THE PCM FOR A SHORT TO VOLTAGE


- Disconnect: PCM C175B.
- Measure the voltage between ignition switch C2280E-8, circuit CDC38 (WH/VT), harness side and ground.




- Is any voltage present?

Yes
GO to E5.

No
GO to E6.

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E5 CHECK THE STARTER RELAY


- Disconnect: Starter Relay.
- Carry out the Relay Component Test.
Refer to Wiring Diagrams for component testing. Diagrams By Number

- Is the starter relay OK?

Yes
INSTALL a new starter relay. CLEAR the DTC. REPEAT the self-test.

No
REPAIR circuit CDC38 (WH/VT). CLEAR the DTC. REPEAT the self-test.

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E6 CHECK FOR CORRECT PCM OPERATION


- Check PCM connector C175B for:

- corrosion.
- pushed-out pins.
- spread terminal.
- Connect: PCM C175B.
- 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 PCM. REFER to Electronic Engine Controls Service and Repair. CLEAR the DTC. REPEAT the self-test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.

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E7 CHECK FOR CORRECT SJB OPERATION


- Check SJB connector C2280E for:

- corrosion.
- pushed-out pins.
- spread terminal.
- Connect: SJB C2280E.
- 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 Multifunction Electronic Modules Service and Repair. CLEAR the DTC. REPEAT the self-test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.

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