Brake Transmission Shift Interlock Inoperative (Lock System Does Not
Lock)
Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION: Transmission shifts
out of PARK with the ignition switch in ON and brake pedal not depressed.
|
1
| Were you sent here from the Brake Transmission Shift Interlock System
Check?
| --
|
Go to Step 2
| Go to Brake Transmission
Shift Interlock System Check
|
2
|
- Disconnect the park/neutral position switch connector C1.
- Connect a DMM between the park/neutral position switch connector
C1 terminal C and ground.
- Turn the ignition switch to the ON position.
- Measure the available voltage at the park/neutral position switch
connector C1 terminal C.
Is the voltage within the specified values?
| 10.0-14.0V
|
Go to Step 3
|
Go to Step
8
|
3
|
- Connect a DMM between the park/neutral position switch terminal
C and terminal B.
- Place gearshift selector in the PARK position.
- Measure for continuity between terminal C and terminal B of the
park/neutral position switch.
Is continuity present across the park/neutral position switch when the
gearshift selector is placed in PARK?
| --
|
Go to Step
4
|
Go to Step 9
|
4
|
- Disconnect the brake transmission shift interlock switch connector.
- Connect a DMM between the park/neutral position switch connector
C1 terminal B and the brake transmission shift interlock switch connector
terminal A.
- Measure for continuity between the park/neutral position switch
connector C1 terminal B and the brake transmission shift interlock switch
connector terminal A.
Is CKT 434 continuous between these two connectors?
| --
|
Go to Step 5
|
Go to Step
10
|
5
|
- Connect a DMM between terminal A and terminal B of the brake transmission
shift interlock switch.
- DO NOT depress the brake pedal.
- Measure for continuity between terminal A and terminal B of the
brake transmission shift interlock switch.
Is continuity present across the brake transmission shift interlock
switch when the brake pedal is not depressed?
| --
|
Go to Step 6
|
Go to Step
11
|
6
|
- Disconnect the brake transmission shift interlock control solenoid
connector.
- Connect a DMM between the brake transmission shift interlock control
solenoid connector terminal C and the brake transmission shift interlock switch
connector terminal B.
- Measure for continuity between the brake transmission shift interlock
control solenoid connector terminal C and the brake transmission shift interlock
switch connector terminal B.
Is CKT 1135 continuous between these two connectors?
| --
|
Go to Step 18
|
Go to Step 7
|
7
| Repair the open in CKT 1135.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
8
| Check the BTSI BU MiniFuse® #21 for an open.
Is the fuse open?
| --
|
Go to Step 13
|
Go to Step 12
|
9
| Replace
the park/neutral position switch.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
10
| Repair the open in CKT 434.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
11
| Replace the brake transmission shift interlock switch.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
12
| Repair the open in CKT 341.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
13
|
- Remove the BTSI BU MiniFuse® #21.
- Leave the park/neutral position switch connector C1 disconnected.
- Connect a DMM between the park/neutral position switch connector
C1 terminal C and ground.
- Measure CKT 341 for continuity to ground?
Is CKT 341 continuous to ground?
| --
|
Go to Step
14
|
Go to Step 15
|
14
| Repair a short to ground in CKT 341.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
15
|
- Disconnect the brake transmission shift interlock switch connector.
- Connect a DMM between the park/neutral position switch connector
C1 terminal B and ground.
- Measure CKT 434 for continuity to ground?
Is CKT 434 continuous to ground?
| --
|
Go to Step
16
|
Go to Step 17
|
16
| Repair a short to ground in CKT 434.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
17
| Repair a short to ground in CKT 1135.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
18
|
- Connect a DMM between the brake transmission shift lock control
solenoid connector terminal D and ground.
- Measure CKT 150 for continuity to ground?
Is the resistance to ground less than the specified value?
| 0.5ohms
|
Go to Step 19
|
Go to Step 20
|
19
| Replace the brake transmission
shift lock control solenoid.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
20
| Repair an open in CKT 150.
Is the repair complete?
| --
| Go to Brake Transmission Shift Interlock System Check
| --
|
