Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
DEFINITION: Transmission shift lever does not lock in the PARK position with the ignition ON and the brake pedal not pressed. | ||||||||
1 | Did you perform A Diagnostic System Check - Automatic Transmission Shift Lock Control System? | -- | Go to Step 2 | Go to Diagnostic System Check - Automatic Transmission Shift Lock Control | ||||
2 |
Does the scan tool display PARK position for the IMS parameter? | -- | Go to Step 3 | Go to Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission | ||||
3 | With a scan tool observe the PARK relay status in the body control module (PZM) data display list. Does the scan tool display an ON status for the PARK relay? | -- | Go to Step 4 | Go to Step 24 | ||||
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 12 | ||||
5 | Connect a test lamp between the PARK relay switch side feed circuit and a good ground. Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 13 | ||||
6 |
Does the test lamp turn ON and OFF with each command? | -- | Go to Step 7 | Go to Step 14 | ||||
7 |
Does the shift lever move out of the PARK position? | -- | Go to Step 8 | Go to Step 18 | ||||
8 |
Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 15 | ||||
9 | Connect a test lamp between the automatic transmission shift lock control signal circuit at the automatic transmission shift lock control switch and a good ground. Does the test lamp illuminate? | -- | Go to Step 10 | Go to Step 20 | ||||
10 | Connect a test lamp between the automatic transmission shift lock control signal circuit at the automatic transmission shift lock control actuator and a good ground. Does the test lamp illuminate? | -- | Go to Step 11 | Go to Step 16 | ||||
11 | Connect a test lamp between the automatic transmission shift lock control ground circuit at the automatic transmission shift lock control actuator and battery positive voltage (B+). Does the test lamp illuminate? | -- | Go to Step 22 | Go to Step 17 | ||||
12 | Repair the open or high resistance in the PARK relay coil side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | -- | ||||
13 | Repair the open or high resistance in the PARK relay switch side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | -- | ||||
14 | Test the control circuit of the PARK relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | Go to Step 24 | ||||
15 | Repair the open or high resistance in the PARK relay signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | -- | ||||
16 | Repair the open or high resistance in the automatic transmission shift lock control signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | -- | ||||
17 | Repair the open or high resistance in the automatic transmission shift lock control actuator ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 26 | -- | ||||
18 | Inspect for poor connection at the PARK relay 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 26 | Go to Step 19 | ||||
19 | Replace the PARK relay. Refer to Connector Repairs in Wiring Repairs. Did you complete the replacement? | -- | Go to Step 26 | -- | ||||
20 |
Did you find and correct the condition? | -- | Go to Step 26 | Go to Step 21 | ||||
21 | Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Did you complete the replacement? | -- | Go to Step 26 | -- | ||||
22 | Inspect for poor connection at automatic transmission shift lock control actuator 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 26 | Go to Step 23 | ||||
23 | Replace the automatic transmission shift lock control actuator. Refer to Automatic Transmission Shift Lock Control Replacement - Floor Shift Mounted Did you complete the replacement? | -- | Go to Step 26 | -- | ||||
24 | Inspect for poor connection at body control module (PZM) 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 26 | Go to Step 25 | ||||
25 | Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 26 | -- | ||||
26 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 | ||||
