Starter Solenoid Clicks, Engine Does Not Crank
Circuit/System Description
When the ignition switch is placed in the START position, a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the START position. The BCM then sends a message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the transmission is in Park or Neutral. If it is, the ECM then supplies 12 V to the control circuit of the STARTER relay. When this occurs, battery voltage is supplied through the switch of the STARTER relay to S terminal of the starter solenoid.
Circuit/System Verification
- Verify that the battery is sufficiently charged and that the battery cables are clean and tight.
- Turn the ignition switch to the start position. The starter solenoid should click.
- Remove the drive belt. Refer to Drive Belt Replacement .
- Turn the ignition switch to the START position.
⇒ | If the engine cranks, inspect the engine and belt drive system for mechanical binding, seized engine, or seized generator, etc. |
- Using a DMM, measure between the positive battery cable and terminal B at the solenoid as the ignition switch is turned to the START position. Voltage should be less than 0.5 V.
⇒ | If greater than the specified value, replace the positive battery cable. |
- Using a DMM, measure the negative battery cable to the starter motor casing as the ignition switch is turned to the START position. Voltage should be less than 0.5 V.
⇒ | If greater than the specified value, replace the negative battery cable. |
- If all circuits test normal, replace the starter motor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Refer to Starter Replacement .
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