Schematic Reference: Starting and Charging Schematics

Connector End View Reference: Engine Electrical Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Turn the ignition 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 - Vehicle in Vehicle DTC Information

Go to Step 4

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

Does the scan tool display Yes?

Go to Step 5

Go to Step 7

1. With a scan tool, observe the Starter Relay Command parameter in the PCM data list.
2. Turn the ignition switch to the START position.

Does the scan tool display ON?

Go to Step 8

Go to Step 6

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 19

Go to Range Selector Displays Incorrect Range in Automatic Transaxle - 4T65-E

1. Turn OFF the ignition.
2. Disconnect the PCM.
3. Connect a test lamp between the Ign Crank Sense circuit of the PCM harness connector and a good ground.
4. Turn the ignition switch to the START position.

Does the test lamp illuminate?

Go to Step 19

Go to Step 14

Turn the ignition to the START position.

Does the Starter relay click?

Go to Step 11

Go to Step 9

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 Ignition 1 voltage circuit of the Starter relay coil and a good ground.

Does the test lamp illuminate?

Go to Step 10

Go to Step 23

1. Connect a test lamp between the Ignition 1 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 17

Go to Step 15

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 circuit and a good ground.

Does the test lamp illuminate?

Go to Step 12

Go to Step 21

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

Does the engine crank?

Go to Step 17

Go to Step 13

Does the fuse in the jumper open?

Go to Step 22

Go to Step 16

Test the crank voltage circuit for an open, short to ground or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 18

Test the Starter relay control circuit of the PCM for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

Go to Step 19

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

Did you find and correct the condition?

Go to Step 28

Go to Step 20

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 28

Go to Step 24

Inspect for poor connections at the ignition switch harness connector. 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 28

Go to Step 25

Inspect for poor connections at the PCM harness connector. 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 28

Go to Step 26

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 28

Go to Step 27

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

Did you complete the repair?

Go to Step 28

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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 28

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Repair the open or high resistance in the Ignition 1 voltage circuit of the Starter relay coil. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 28

--

Replace the Starter relay.

Did you complete the replacement?

Go to Step 28

--

Replace the ignition switch. Refer to Ignition and Start Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 28

--

Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 28

--

Replace the starter motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 28

--

Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 2