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 Commanded Starter 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 11

Turn the ignition to the START position.

Does the CRANK relay click?

Go to Step 8

Go to Step 5

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

Does the test lamp illuminate?

Go to Step 6

Go to Step 7

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

Does the test lamp illuminate?

Go to Step 15

Go to Step 12

1. Turn OFF the ignition.
2. Disconnect the park neutral position (PNP) switch.
3. Turn ON the ignition, with the Engine OFF.
4. Connect a 10 amp fused jumper between the CRANK relay coil control circuits of the PNP switch.
5. Turn the ignition to the START position.

Does the test lamp illuminate?

Go to Step 14

Go to Step 21

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

Does the test lamp illuminate?

Go to Step 9

Go to Step 19

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

Does the engine crank?

Go to Step 15

Go to Step 10

Does the fuse in the jumper open?

Go to Step 20

Go to Step 13

Test the control circuit of the CRANK 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 27

Go to Step 16

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 27

Go to Step 16

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 27

Go to Step 18

1. Inspect the PNP switch for proper operation. Refer to Park/Neutral Position Switch Adjustment in Automatic Transaxle - 4T65 - E.
2. Inspect for poor connection at the PNP 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 27

Go to Step 22

Inspect for poor connections at the CRANK 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 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 27

Go to Step 24

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 27

Go to Step 25

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 26

Repair the open or high resistance in the battery positive voltage circuit of the CRANK 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 supply voltage circuit of the starter solenoid. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

--

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

Did you find and correct the condition?

Go to Step 27

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Replace the PNP switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle - 4T65 - E.

Did you complete the replacement?

Go to Step 27

--

Replace the CRANK relay.

Did you complete the replacement?

Go to Step 27

--

Replace the Ignition Switch. Refer to Ignition Switch Replacement - On Vehicle in Instrument Panel, Gauges, and Console.

Did you complete the replacement?

Go to Step 27

--

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

Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls - 3.4L.

Did you complete the replacement?

Go to Step 27

--

Replace the Starter Motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 27

--

Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 2