Did you perform the Engine Electrical Diagnostic System Check?

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

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Crank Request 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 4

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 TCM data list.

Does the scan tool display Park or Neutral?

Go to Step 5

Go to Transmission Internal Mode Switch Logic in Automatic Transaxle - 4T65- E or Transmission Internal Mode Switch Logic in Automatic Transaxle - 4T80- E

With a scan tool, observe the VTD Fuel Disable states in the PCM data list.

Does the scan tool display Active?

Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent System

Go to Step 14

Turn the ignition switch to the START position.

Do you hear the START relay click?

Go to Step 9

Go to Step 7

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

Does the test lamp illuminate?

Go to Step 8

Go to Step 19

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

Does the test lamp illuminate?

Go to Step 15

Go to Step 13

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

Does the test lamp illuminate?

Go to Step 10

Go to Step 20

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

Does the engine crank?

Go to Step 15

Go to Step 11

Does the fuse in the jumper open?

Go to Step 21

Go to Step 12

Test the supply voltage circuit of the starter solenoid 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 26

Go to Step 16

Test the control circuit of the START 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 26

Go to Step 18

Test the crank request input 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 26

Go to Step 17

Inspect for poor connections at the START 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 26

Go to Step 22

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 26

Go to Step 23

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 26

Go to Step 24

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 26

Go to Step 25

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

Did you complete the repair?

Go to Step 26

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

Did you complete the repair?

Go to Step 26

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

Did you complete the repair?

Go to Step 26

--

Replace the START relay.

Did you complete the replacement?

Go to Step 26

--

Replace the Starter Motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 26

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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 26

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Important:: Perform the set up procedures for the PCM/VCM.

Replace the PCM/VCM. Refer to Powertrain Control Module Replacement in Engine Controls - 3.5 L and Powertrain Control Module Replacement in Engine Controls - 4.0 L.

Did you complete the replacement?

Go to Step 26

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2