Schematic Reference: Starting and Charging Schematics

Did you review the following description and operations and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Engine Electrical

Turn the ignition to the START position.

Does the starter solenoid click?

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

Go to Step 3

1. Install a scan tool.
2. Monitor the Starter Switch parameter in the Engine Data list.

Does the starter switch indicate Cranking when the ignition switch is in the start position?

Go to Step 4

Go to Step 9

1. Turn OFF the ignition.
2. Disconnect the starter solenoid crank voltage circuit from the starter solenoid.
3. Connect a test lamp between the starter solenoid crank voltage circuit and a good ground.
4. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 12

Go to Step 5

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

Did you find and correct the condition?

Go to Step 21

Go to Step 6

Test the ST relay supply voltage circuit for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 7

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

Did you find and correct the condition?

Go to Step 21

Go to Step 8

Test the ST relay coil crank voltage circuit for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 18

1. Turn OFF the ignition.
2. Disconnect the Park/Neutral Position (PNP) switch or the Clutch Pedal Position (CPP) switch.
3. Connect a 10 Amp fused jumper between the crank voltage circuit and the starter solenoid crank voltage circuit of the appropriate switch.
4. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 13

Go to Step 10

1. Connect a test lamp between the crank voltage circuit of the PNP switch or the CPP switch and a good ground.
2. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 16

Go to Step 11

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

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Inspect for a poor connection at 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 21

Go to Step 17

Inspect the PNP switch or the CPP switch for proper operation. Use the scan tool to monitor the PNP switch positions.

Did you find and correct the condition?

Go to Step 21

Go to Step 14

Inspect for a poor connection at the PNP switch or at the CPP 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 21

Go to Step 19

Inspect for a poor connection 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 21

Go to Step 20

Repair the high resistance or open in the starter solenoid crank voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 21

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Replace the starter. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 21

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Replace the starter relay.

Did you complete the replacement?

Go to Step 21

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Replace the PNP switch or the CPP switch. Refer to the following:

Did you complete the replacement?

Go to Step 21

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Replace the ignition switch. Refer to the following:

Did you complete the replacement?

Go to Step 21

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Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 3