Starter Solenoid Clicks, Engine Does Not Crank

Starter Solenoid Clicks, Engine Does Not Crank

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.

Reference Information
Schematic Reference

Starting and Charging Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Starting System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Verification

1. Ignition OFF, measure and record the battery voltage at the C1 terminals. The voltage should be between 12.0-15.0 V.

• If not within the specified range, refer to Battery Inspection/Test (Battery Inspection/Test).

2. Remove the drive belts. Refer to one of the following:

* Drive Belt Idler Pulley Replacement (Service and Repair)for the 2.8L, 3.0L, 3.2L, or 3.6L engines
* Drive Belt Tensioner Removal (1. Drive Belt Tensioner Removal)for the 2.8L, 3.0L, 3.2L, or 3.6L engines
* Drive Belt Replacement - Accessory ()for the 6.2L engine
* Drive Belt Tensioner Replacement - Accessory ()for the 6.2L engine

3. Using the appropriate tools, rotate the crankshaft by hand and verify the crankshaft rotates.

• If the crankshaft does not rotate, refer to one of the following:

* Engine Will Not Crank - Crankshaft Will Not Rotate (Engine Will Not Crank - Crankshaft Will Not Rotate)for the 2.8L, 3.0L, 3.2L, or 3.6L engines
* Engine Will Not Crank - Crankshaft Will Not Rotate (Engine Will Not Crank - Crankshaft Will Not Rotate)for the 6.2L engine

4. Ignition start, verify the engine does not crank.

• If the engine cranks, inspect the engine and belt drive system for mechanical binding, seized engine, or seized generator.

5. Verify that a test lamp illuminates between the M64 starter motor B+ terminal X1 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

6. Test for less than 0.5 V between the positive battery cable and terminal X1 at the M64 starter motor as ignition is switched to start position.

• If greater than the specified value, replace the positive battery cable.

7. Test for less than 0.5 V between the negative battery cable and the M64 starter motor case as ignition is switched to start position.

• If greater than the specified value, replace the negative battery cable.

8. If all circuits test normal, replace the M64 starter motor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Battery Negative Cable Replacement (Battery Negative Cable Replacement)
* Battery Positive Cable Replacement (Service and Repair)
* Starter Replacement (LF1/LLT) (Service and Repair)Starter Replacement (LSA) (Service and Repair)