Schematic Reference: Starting and Charging Schematics

Did you perform the Diagnostic System Check for Engine Electrical?

Go to Step 2

Go to Diagnostic System Check - Engine Electrical

Turn the ignition switch to the START position.

Does the engine crank?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Is the security indicator flashing?

Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent

Go to Step 4

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Starter Relay Command parameter in the PCM data list.
4. Turn the ignition switch to the START position.

Does the scan tool display Yes?

Go to Step 6

Go to Step 5

1. Turn ON the ignition, with the engine OFF.
2. Verify that the transmission is in Park or Neutral.
3. With a scan tool, observe the IMS parameter in the Transmission data list.

Does the scan tool display Park or Neutral?

Go to Step 12

Go to Transmission Internal Mode Switch Logic in Automatic Transaxle - 4T65- E

Turn the ignition switch to the START position.

Do you hear the STARTER relay click?

Go to Step 9

Go to Step 7

1. Turn OFF the ignition.
2. Disconnect the STARTER relay.
3. Turn ON the ignition, with the engine OFF.
4. 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 8

Go to Step 20

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

Does the test lamp illuminate?

Go to Step 16

Go to Step 14

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 switch and a good ground.

Does the test lamp illuminate?

Go to Step 10

Go to Step 21

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

Does the engine crank?

Go to Step 16

Go to Step 11

Does the fuse in the jumper open?

Go to Step 22

Go to Step 13

1. Turn OFF the ignition.
2. Disconnect the PCM harness connector.
3. Connect a test lamp between the crank request input circuit of the PCM and a good ground.
4. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 19

Go to Step 15

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

Did you find and correct the condition?

Go to Step 27

Go to Step 17

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

Did you find and correct the condition?

Go to Step 27

Go to Step 19

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

Did you find and correct the condition?

Go to Step 27

Go to Step 18

Inspect for poor connections at the STARTER relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 23

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

Did you find and correct the condition?

Go to Step 27

Go to Step 24

Inspect for poor connections at the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 25

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

Did you find and correct the condition?

Go to Step 27

Go to Step 26

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

Did you complete the repair?

Go to Step 27

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

Did you complete the repair?

Go to Step 27

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

Did you complete the repair?

Go to Step 27

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Replace the STARTER relay.

Did you complete the replacement?

Go to Step 27

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Replace the Starter Motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 27

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Replace the ignition switch. Refer to Ignition and Start Switch Replacement in Instrument Panel Gauges and Console.

Did you complete the replacement?

Go to Step 27

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Important:: Perform the set up procedures for the PCM. Refer to Powertrain Control Module Programming in Engine Controls - 3.8L.

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 3.8L.

Did you complete the replacement?

Go to Step 27

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2