For 1990-2009 cars

## Shift Lever Does Not Move with Brake Pedal Depressed With Cruise Control

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Shift Lock Control Schematics
1 | Did you review the Automatic Transmission Shift Lock Control Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Automatic Transmission Shift Lock Control
2 |

1. Turn the ignition switch to the ON position.
2. Attempt to move the selector lever out of the PARK position. The selector lever should not move out of the PARK position.
3. Depress the brake pedal.
4. Attempt to move the manual selector out of the PARK position. The selector lever should move out of the PARK position.

Does the shift lock control operate properly?

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

Go to Step 3

3 |

1. Exchange the shift lock relay with a known good relay (the horn relay or the compressor relay).
2. Turn the ignition switch to the ON position.
3. Depress the brake pedal.
4. Attempt to move the manual selector from the PARK position.

Does the shift lock control operate properly?

Go to Step 15

Go to Step 4

4 |

1. Install a scan tool.
2. Monitor the brake switch status in the transmission data list.
3. Turn the ignition switch to the ON position.
4. Depress the brake pedal.

Does the brake switch status change to APPLIED when the brake pedal is depressed?

Go to Step 7

Go to Step 5

5 | Test the stop lamp switch supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 6
6 | Test the stop lamp switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 16
7 | Test the shift lock relay coil supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 8
8 | Test the shift lock relay control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 9
9 | Monitor the transmission range status in the transmission data list on the scan tool. Does the transmission range indicate the PARK position? | Go to Step 12 | Go to Step 10
10 | Test the transmission range switch supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 11
11 | Test the transmission range switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 17
12 | Test the shift lock relay switch supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 13
13 | Test the shift lock solenoid supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 14
14 | Test the shift lock solenoid ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 18
15 | Inspect for a poor connection at the harness connector of the shift lock 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 23 | Go to Step 19
16 | Inspect for a poor connection at the harness connector of the stop lamp 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 23 | Go to Step 20
17 | Inspect for a poor connection at the harness connector of the transmission range 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 23 | Go to Step 21
18 | Inspect for a poor connection at the harness connector of the shift lock 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 23 | Go to Step 20
19 | Replace the shift lock relay. Did you complete the replacement? | Go to Step 23 | --
20 | Adjust or replace the stop lamp switch. Refer to Stop Lamp Switch Adjustment or Stop Lamp Switch Replacement in Hydraulic Brakes. Did you find and correct the condition? | Go to Step 23 | --
21 | Replace the transmission range switch. Refer to Transmission Range Switch Replacement in Automatic Transmission - 4 Speed - M41. Did you find and correct the condition? | Go to Step 23 | --
22 | Replace the shift lock solenoid. Refer to Shift Lock Control Solenoid Replacement . Did you find and correct the condition? | Go to Step 23 | --
23 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3

## Shift Lever Does Not Move with Brake Pedal Depressed Without Cruise Control

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Shift Lock Control Schematics
1 | Did you review the Automatic Transmission Shift Lock Control Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Automatic Transmission Shift Lock Control
2 |

1. Turn the ignition switch to the ON position.
2. Attempt to move the selector lever out of the PARK position. The selector lever should not move out of the PARK position.
3. Depress the brake pedal.
4. Attempt to move the selector lever out of the PARK position. The selector lever should move out of the PARK position.

Does the shift lock control operate properly?

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

Go to Step 3

3 |

1. Install a scan tool.
2. Monitor the transmission range switch status in the transmission data list.
3. Turn the ignition switch to the ON position.

Does the transmission range indicate the PARK position?

Go to Step 5

Go to Step 4

4 | Test the transmission range switch supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 10
5 | Test the transmission range switch signal circuit to the stop lamp switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 6
6 | Test the operation of the stop lamp switch. Both sets of contacts in the switch should be closed when the brake pedal is applied. Does the stop lamp switch operate properly? | Go to Step 7 | Go to Step 9
7 | Test the shift lock solenoid supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 8
8 | Test the shift lock solenoid ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 11
9 | Inspect for a poor connection at the harness connector of the stop lamp 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 15 | Go to Step 12
10 | Inspect for a poor connection at the harness connector of the transmission range 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 15 | Go to Step 13
11 | Inspect for a poor connection at the harness connector of the shift lock 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 15 | Go to Step 14
12 | Adjust or replace the stop lamp switch. Refer to Stop Lamp Switch Adjustment or Stop Lamp Switch Replacement in Hydraulic Brakes. Did you find and correct the condition? | Go to Step 15 | --
13 | Replace the transmission range switch. Refer to Transmission Range Switch Replacement in Automatic Transmission - 4 Speed - M41. Did you complete the replacement? | Go to Step 15 | --
14 | Replace the shift lock solenoid. Refer to Shift Lock Control Solenoid Replacement . Did you complete the replacement? | Go to Step 15 | --
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3