P2535

Starting System

Pinpoint Test G: DTC P2532 And P2535

Normal Operation

When the ignition key is turned to the RUN or START position, the ignition switch supplies voltage to the PCM logic through the ignition circuit inputs to the BCM (Body Control Module). The PCM then provides a ground to the START/RUN relay control circuit to activate the RUN/START relay. When the relay contacts close voltage is supplied to the PCM through Battery Junction Box (BJB) fuse 52 (10A) on the RUN/START bus and circuit.

- DTC P2532 (Ignition Switch Run Position Circuit High)-- sets when the PCM detects a voltage from the ACC/RUN bus when the ignition key is not in the START or RUN position.

- DTC P2535 (Ignition Switch Run/Start Position Circuit High)-- sets when the PCM detects a voltage from the RUN/START bus when the ignition key is not in the START or RUN position.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Starter relay

- BJB (Battery Junction Box)

- BCM (Body Control Module)

- PCM

PINPOINT TEST G : DTC P2532 AND P2535

G1 CHECK THE PCM FOR DTCS

- Ignition ON.

- Check the PCM for DTCs.

Are any DTCs present?

Yes

For DTC P2532,GO to G2.

For DTC P2535,GO to G3.

For all other PCM DTCs, REFER to Computers and Control Systems.

No
The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

G2 CHECK THE RUN START CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: PCM C175B.

- Ignition ON.

- NOTE: Voltage is presentONLY when the ignition switch is in the START or RUN position.

Measure the voltage between PCM C175B-42, circuit CBB90 (YE/OG), harness side and ground






Is any voltage present?

Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. ACTIVATE other systems in the same wire harness. REPAIR any concern found. REPEAT the self-test. TEST the system for normal operation. If DTC returns. INSTALL a new PCM.

G3 CHECK THE START MOTOR REQUEST CIRCUIT

- Start the engine.

- Disconnect: Starter Motor Relay.

- Measure the voltage between BJB (Battery Junction Box) starter relay socket pin 2, circuit CDC26 (GY/OG) and ground.






Is any voltage present?

Yes
GO to G4.

No
INSTALL a new PCM. TEST the system for normal operation.

G4 CHECK THE START MOTOR REQUEST CIRCUIT FOR A SHORT VOLTAGE

- Ignition OFF.

- Disconnect: PCM C175B.

- Ignition ON.

- Measure the voltage between BJB (Battery Junction Box) starter relay socket pin 1, circuit CDC12 (YE) and ground.






Is any voltage present?

Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
INSTALL a new PCM. TEST the system for normal operation.