Schematic Reference: Starting and Charging Schematics

Connector End View Reference:

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Turn the ignition switch to the START position.

Does the engine crank?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Turn the ignition switch to the START position.

Does the starter relay click?

Go to Step 9

Go to Step 4

1. With a scan tool, observe the Crank Request Signal parameter in the powertrain control module (PCM) data list.
2. Turn the ignition to the START position.

Does the scan tool display that the Crank Request Signal parameter is Yes?

Go to Step 5

Go to Step 12

1. Disconnect the starter relay.
2. Connect a test light between the starter relay coil supply voltage circuit and the starter relay coil control circuit of the starter relay.
3. Turn the ignition switch to the START position.

Does the test light illuminate?

Go to Step 22

Go to Step 6

1. Connect a test light between a battery positive voltage circuit and the starter relay coil control circuit of the starter relay.
2. Turn the ignition switch to the START position.

Does the test light illuminate?

Go to Step 7

Go to Step 18

1. Turn ON the ignition, with the engine OFF.
2. Disconnect the park neutral position (PNP) switch.
3. Connect a test light between the ignition 1 voltage circuit and a good ground.

Does the test light illuminate?

Go to Step 8

Go to Step 16

1. Turn OFF the ignition.
2. Connect a 10-amp fused jumper between the starter relay coil supply voltage circuit and the ignition 1 voltage circuit of the PNP switch.
3. Turn the ignition switch to the START position.

Does the starter motor crank?

Go to Step 23

Go to Step 17

1. Turn OFF the ignition.
2. Disconnect the starter relay.
3. Connect a test lamp between the battery positive voltage circuit of the starter relay and a good ground.

Does the test lamp illuminate?

Go to Step 10

Go to Step 19

Connect a 30-amp fused jumper between the battery positive voltage circuit and the starter solenoid crank voltage circuit of the starter relay.

Does the engine crank?

Go to Step 22

Go to Step 11

Does the fuse in the jumper open?

Go to Step 21

Go to Step 20

1. Connect a test lamp between the Off/Run/Crank voltage circuit of the ignition switch and a good ground.
2. Turn the ignition switch to the START position.

Does the test lamp illuminate?

Go to Step 27

Go to Step 13

Connect a test lamp between the battery positive voltage circuit of the ignition switch and a good ground.

Does the test lamp illuminate?

Go to Step 14

Go to Step 15

Test the Off/Run/Crank voltage circuit of the ignition switch for an open, a high resistance, and a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 25

Repair the battery positive voltage circuit of the ignition switch. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 34

--

Repair the ignition 1 voltage circuit of the PNP switch. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 34

--

Repair the starter relay coil supply voltage circuit of the PNP switch. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 34

--

Test the starter relay coil control circuit of the starter relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 24

Repair the battery positive voltage circuit of the starter relay. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 34

--

Test the starter solenoid crank voltage circuit of the starter relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Test the starter solenoid crank voltage circuit of the starter relay for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Inspect for poor connections at the starter relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 28

Inspect for poor connections at the harness connector of the PNP. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 29

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 30

Inspect for poor connections at the harness connector of the ignition switch harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 31

Inspect for poor connections at the harness connector of the starter solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 32

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 34

Go to Step 33

Replace the starter relay. Refer to Relay Replacement .

Did you complete the replacement?

Go to Step 34

--

Replace the PNP switch. Refer to Park/Neutral Position Switch Replacement for the 4T40-E/4T45-E transaxle.

Did you complete the replacement?

Go to Step 34

--

Replace the PCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 34

--

Replace the ignition switch. Refer to Ignition Switch Lock Cylinder Replacement .

Did you complete the replacement?

Go to Step 34

--

Replace the starter. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 34

--

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 34

--

Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 2

Schematic References: Starting and Charging Schematics

Connector End View Reference: Power and Grounding Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Turn the ignition to the START position.

Does the engine crank?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Verify that the transmission is in Park or Neutral.
4. With a scan tool, observe the IMS/TR Sw. parameter in the transmission control module (TCM) data list.

Does the scan tool display Park or Neutral?

Go to Step 4

Go to Range Selector Displays Incorrect Range or Range Selector Displays Incorrect Range

1. Turn ON the ignition, with the engine OFF.
2. With a scan tool, observe the Starter Relay Command parameter in the engine control module (ECM) data list.
3. Turn the ignition to the START position.

Does the scan tool display ON?

Go to Step 6

Go to Step 5

1. Turn ON the ignition, with the engine OFF.
2. With a scan tool, observe the Power Mode parameter in the BCM data list.
3. Turn the ignition to the START position.

Does the scan tool display Crank Request?

Go to Step 15

Go To Power Mode Mismatch

1. Disconnect the starter relay.
2. Turn ON the ignition, with the engine OFF.
3. Connect a test lamp between the battery positive voltage circuit of the starter relay coil and a good ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 16

1. Connect a test lamp between the battery positive voltage circuit of the starter relay coil and the control circuit of the crank relay.
2. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 8

Go to Step 12

1. Turn OFF the ignition.
2. Connect a test lamp between the battery positive voltage circuit of the starter relay switch and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 17

Important:  The engine may crank during the following step.

1. Turn OFF the ignition.
2. Connect a 30-amp fused jumper between the battery positive voltage circuit of the starter relay switch and the starter solenoid crank voltage circuit of the starter relay.

Does the engine crank?

Go to Step 13

Go to Step 10

Does the fuse in the jumper open?

Go to Step 18

Go to Step 11

Test the starter solenoid crank voltage circuit of the starter solenoid for a high resistance or open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 14

Test the control circuit of the starter relay for an open or short to battery voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 15

Inspect for poor connections at the starter relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 19

Inspect for poor connections at the starter solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 20

Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 21

Repair the open or high resistance in the battery positive voltage of the starter relay coil circuit. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 22

--

Repair the open or high resistance in the battery positive voltage circuit of the starter relay switch. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 22

--

Repair the short to ground in the crank voltage circuit of the starter solenoid. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 22

--

Replace the starter relay.

Did you complete the replacement?

Go to Step 22

--

Replace the starter motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 22

--

Replace the ECM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 22

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2