Shift Lever Can Be Moved without Brake Pedal Depressed w/o Allison Transmission
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Shift Lock Control Schematics Connector End View Reference: Master Electrical Component List 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 the Symptoms - Automatic Transmission Shift Lock Control tests and all the necessary inspections? | Go to Step 2 | |
2 |
Does the shift lever move out of the PARK position? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 8 |
4 | Connect a test lamp between the A/T shift lock switch supply voltage circuit at the automatic transmission shift lock control switch and a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 14 |
5 |
Does the test lamp turn ON and OFF with the brake pedal? | Go to Step 6 | Go to Step 11 |
6 | Connect a test lamp between the automatic transmission shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control solenoid and a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 15 |
7 | Test the automatic transmission shift lock control solenoid ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 20 | Go to Step 12 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 13 |
9 |
Does the test lamp illuminate? | Go to Step 10 | Go to Step 16 |
10 |
Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
11 | Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
12 | Inspect for poor connections at the harness connector automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
13 | Repair the open or short in the ignition 1 voltage circuit of the park/neutral position switch. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | -- |
14 | Repair the open or short in the A/T shift lock switch supply voltage circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | -- |
15 | Repair the open in the A/T shift lock control solenoid supply voltage circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | -- |
16 | Repair the open or short in the park/neutral position switch park signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | -- |
17 | Replace the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement for the 4L60-E transmission or Park/Neutral Position Switch Replacement for the 4L80-E transmission. Did you complete the replacement? | Go to Step 20 | -- |
18 | Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement . Did you complete the replacement? | Go to Step 20 | -- |
19 | Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Control Actuator Replacement . Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
