Test A: The Engine Does Not Crank/the Relay Does/Does Not Click

PINPOINT TEST A: THE ENGINE DOES NOT CRANK/THE RELAY DOES/DOES NOT CLICK

A1-A2:

A3-A5:

A6-A9:

A9-A10:

A10 Continued:

A11-A12:

A12-A14:

A14-A15:

A16-A18:

A18-A19:

A20-A21:

A22-A23:

A24:

A25:

A26-A27:

A28-A29:

Under normal operation, constant power is supplied to the starter motor relay from battery junction box (BJB) fuse 11 (30A). When the ignition switch is turned in the START position and held, power flows to the one-touch integrated start (OTIS) diode through circuit CDC35 (BU/WH). Power then flows to the digital transmission range (TR) sensor (4.0L SOHC engines only) and to the starter motor relay through circuit CDC38 (WH/VT). A ground is supplied through circuit CDC12 (YE) from the PCM, causing the starter motor relay coil to energize and the relay contacts to close. This allows power to be supplied from the starter motor relay contacts which then flows through circuit CDC25 (BN/GN) to the starter solenoid. The solenoid is grounded at the starter motor. Energizing the starter solenoid engages the starter drive into the ring gear and closes the solenoid contacts, allowing power directly from the battery through circuit SDC02 (RD) to the starter motor to start the engine.

This pinpoint test is intended to diagnose the following:
- Battery
- Starter motor
- Passive anti-theft system (PATS)
- Starter relay
- Ignition switch
- TR sensor (4.0L SOHC only)
- Circuitry
- PCM
- OTIS diode