SCHEMATIC REFERENCE:

Reverse Lockout Actuator Control

Did you perform the Automatic Transmission Shift Lock Control Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Automatic Transmission Shift Lock Control

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Place the transmission in NEUTRAL.
4. With a scan tool, command the reverse lockout actuator ON.
5. Attempt to shift the transmission into REVERSE.

Does the transmission shift into REVERSE?

Go to Step 4

Go to Step 3

1. With a scan tool, command the reverse lockout actuator OFF.
2. Attempt to shift the transmission into REVERSE.

Does the transmission shift into REVERSE?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the harness connector of the reverse lockout actuator.
3. Connect a test lamp between the ignition positive voltage circuit of the reverse lockout actuator and a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 11

1. Connect a test lamp between the ignition positive voltage circuit of the reverse lockout actuator and the control circuit of the reverse lockout actuator.
2. With a scan tool, command the reverse lockout actuator ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 9

Go to Step 6

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 8

Test the control circuit of the reverse lockout actuator for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 10

Test the control circuit of the reverse lockout actuator for an open or short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 10

Inspect for poor connections at the reverse lockout actuator. 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 14

Go to Step 12

Inspect for poor connections at the harness connector of the DIM. 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 14

Go to Step 13

Repair an open or short to ground in the ignition positive voltage circuit of the reverse lockout actuator. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

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Replace the reverse lockout actuator.

Refer to Transmission Control Replacement in Automatic Transaxle--4T80-E.

Did you complete the replacement?

Go to Step 14

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Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 14

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2