SCHEMATIC REFERENCE: Starting and Charging Schematics

Did you perform the Diagnostic System Check for starting and charging?

Go to Step 2

Go to Diagnostic System Check - Engine Electrical .

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

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

Does the scan tool display Enabled?

Go to Step 4

Go to Step 10

Turn the ignition to the START position.

Does the Theft Deterrent relay click?

Go to Step 7

Go to Step 5

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

Does the test lamp illuminate?

Go to Step 6

Go to Step 19

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

Does the test lamp illuminate?

Go to Step 13

Go to Step 11

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

Does the test lamp illuminate?

Go to Step 8

Go to Step 21

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

Does the engine crank?

Go to Step 13

Go to Step 9

Does the fuse in the jumper open?

Go to Step 18

Go to Step 12

Test the crank request signal 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 24

Go to Step 14

Test the control circuit of the Theft Deterrent relay 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 24

Go to Step 15

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 24

Go to Step 16

Inspect for poor connections at the Theft Deterrent 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 24

Go to Step 20

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 24

Go to Step 21

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 24

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 24

Go to Step 23

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

Did you complete the repair?

Go to Step 24

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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 24

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

Did you complete the repair?

Go to Step 24

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Replace the Theft Deterrent relay. Refer to Theft Deterrent Relay Replacement in Theft Deterrent.

Did you complete the replacement?

Go to Step 24

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Replace the Ignition Switch. Refer to Ignition Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

Go to Step 24

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IMPORTANT:: Perform the set up procedures for the PCM.

Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls - 4.6L.

Did you complete the replacement?

Go to Step 24

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Replace the Starter Motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 24

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Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 2