Pinpoint Test E: DTC B2A20 - Ignition Stuck In Start

Steering Column Switches

Pinpoint Tests


Pinpoint Test E: DTC B2A20 - Ignition Stuck in START

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

Normal Operation

The ignition switch is spring loaded to automatically return to the RUN position after being placed in the START position. When the ignition switch is placed in START, fused ignition voltage is sent to the One-Touch Integrated Start (OTIS) diode in the Battery Junction Box (BJB) and the PCM along circuit CDC35 (BU/WH). From the OTIS diode, the voltage is sent to the Smart Junction Box (SJB), the PCM and the starter relay in the BJB along circuit CE336 (GN/WH).

- B2A20 Ignition Stuck in START - The SJB continuously monitors the ignition switch state, if the SJB detects voltage on circuit CE336 (GN/WH) 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



PINPOINT TEST E: B2A20 - IGNITION STUCK IN START

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 VERIFY THE IGNITION SWITCH MECHANICAL FUNCTION


- Inspect the ignition switch for mechanical function. Refer to Ignition Switch - Mechanical Component Test. Component Tests and General Diagnostics
- Is the ignition switch OK?

Yes
GO to E2.

No
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. CLEAR the DTC. TEST the system for normal operation. RETRIEVE any DTCs.

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E2 CHECK THE IGNITION SWITCH FOR A SHORT


- Carry out the Ignition Switch - Electrical Component Test.
- Is the ignition switch OK?

Yes
GO to E3.

No
INSTALL a new ignition switch. REFER to Ignition Switch Ignition Switch. CLEAR the DTC. TEST the system for normal operation. RETRIEVE any DTCs.

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E3 CHECK CIRCUIT CDC35 (BU/WH) FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: Ignition Switch C250.
- Disconnect: OTIS Diode.
- Ignition ON.
- Measure the voltage between the OTIS diode, circuit CDC35 (BU/WH), input side and ground.




- Is any voltage present?

Yes
REPAIR circuit CDC35 (BU/WH). CLEAR the DTC. TEST the system for normal operation. RETRIEVE any DTCs.

No
GO to E4.

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E4 CHECK CIRCUIT CE336 (GN/WH) FOR A SHORT TO VOLTAGE


- Measure the voltage between the OTIS diode, circuit CE336 (GN/WH), output side and ground.




- Is any voltage present?

Yes
REPAIR circuit CE336 (GN/WH). CLEAR the DTC. TEST the system for normal operation. RETRIEVE any DTCs.

No
GO to E5.

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E5 CHECK FOR CORRECT SJB OPERATION


- Disconnect: SJB C2280b.
- Check SJB connector C2280b for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect: SJB C2280b.
- 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. CLEAR the DTCs. TEST the system for normal operation. RETRIEVE any DTCs.

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

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