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Home >> Buick >> 2013 >> Verano L4-2.0L Turbo >> Repair and Diagnosis >> Starting and Charging >> Starting System >> Testing and Inspection >> Starter Solenoid Does Not Click

Starter Solenoid Does Not Click




Starter Solenoid Does Not Click

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.

Diagnostic Fault Information






Circuit/System Description

When the ignition mode 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 serial data message to the engine control module (ECM) that crank has been requested. The ECM then verifies that the clutch is fully depressed or the automatic transmission is in Park/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 the starter solenoid.

Reference Information

Schematic Reference

* Starting and Charging Schematics [1][2]Electrical Diagrams

* Automatic Transmission Controls Schematics Electrical Diagrams

* Manual Transmission Schematics (MR6 (F40)) Electrical Diagrams

Connector End View Reference

Component Connector End Views Outside Rearview Mirror - Driver

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 Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify that no ignition, starter relay, brake pedal position sensor, immobilizer, or automatic transmission DTCs are set that would cause the K20 Engine Control Module to disable engine starting.

• If DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If no DTCs are set

3. Verify the scan tool BCM 5 V Ignition Switch parameter is Crank Request when the ignition switch is in the crank position.

• If Crank Request not displayed
Refer to Power Mode Mismatch Power Mode Mismatch.

4. Verify the scan tool TCM Internal Mode Switch parameter displays Park with the transmission range selector in park.

• If the TCM Internal Mode Switch parameter does not indicate Park
Refer to Transmission Internal Mode Switch Logic Transmission Internal Mode Switch Logic

• If the TCM Internal Mode Switch parameter indicates Park

5. Verify the crank relay clicks and the engine begins cranking with the ignition in the Crank position.

• If the KR27 starter relay does not click
Refer to Circuit/System Testing.

• If the KR27 starter relay clicks

6. All OK.

Circuit/System Testing

1. Ignition ON.

2. Verify the scan tool ECM Ignition 1 Signal parameter is greater than 10 V.

• If 10 V or less

1. Ignition OFF, disconnect the harness connector at the K20 engine control module.

2. Test for infinite resistance between the ignition voltage circuits and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K20 engine control module.

• If greater than 10 V

3. Ignition OFF, disconnect the KR27 starter relay, ignition ON.

4. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.

• If the test lamp does not illuminate and the circuit fuse is good

1. Ignition OFF.

2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.

• If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.

2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance,

3. Disconnect X1 harness connector at the M64 starter motor.

4. Test for infinite resistance between the control circuit terminal 87 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the M64 starter motor.

• If the test lamp illuminates

5. Ensure the parking brake is applied and the T12 transmission is in PARK. Momentarily install a 30 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87.

6. Verify the M64 starter motor is activated.

• If the M64 starter motor does not activate

1. Disconnect the X1 harness connector at the M64 starter motor.

2. Test for less than 2 ohms in the control circuit end to end.

• If greater the 2 ohms, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the M64 starter motor.

• If the M64 starter motor activates

7. Test or replace the KR27 starter relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR27 starter relay.

2. Test for 60-180 ohms between terminals 85 and 86.

• If less than 60 or greater than 180 ohms
Replace the relay.

• If between 60-180 ohms

3. Test for infinite resistance between the terminals listed below:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

• If less than infinite resistance
Replace the relay.

• If infinite resistance

4. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.

5. Test for less than 2 ohms between terminals 30 and 87.

• If 2 ohms or greater
Replace the relay.

• If less than 2 ohms

6. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement Service and Repair

* Relay Replacement (Within an Electrical Center) Relay Replacement (Within an Electrical Center)Relay Replacement (Attached to Wire Harness) Relay Replacement (Attached to Wire Harness)

* Control Module References Control Module References for ECM replacement, programming, and setup.

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