Pinpoint Test J: Brake Shift Interlock Inoperative
Test Step
J1 CHECK FOR FEM DTCs
- Retrieve FEM DTCs. Refer to EXTERIOR LIGHTING .
- Are any DTCs retrieved related to the brake switch?
Result / Action to Take
Yes
REFER to EXTERIOR LIGHTING .
No
GO to J2.
Test Step
J2 CHECK FOR VOLTAGE ON CIRCUIT 7S-TA33 (YE/VT)
- Key in OFF position.
- Disconnect: Brake Shift Interlock C322.
- Key in ON position.
- Press and hold the brake pedal.
- Measure the voltage between brake shift interlock C322 pin 2, circuit 7S-TA33 (YE/VT), harness side and ground.
- Is the voltage greater than 10 volts?
Result / Action to Take
Yes
GO to J5.
No
GO to J3.
Test Step
J3 CHECK CIRCUIT 75-TA33 (YE/VT) FOR SHORT TO GROUND
- Disconnect: FEM C201f.
- Measure the resistance between brake shift interlock C322 pin 2, circuit 7S-TA33 (YE/VT), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Result / Action to Take
Yes
GO to J4.
No
REPAIR the circuit. TEST the system for normal operation.
Test Step
J4 CHECK CIRCUIT 7S -TA33 (YE/VT) FOR OPEN
- Measure the resistance between brake shift interlock C322 pin 2, circuit 7S-TA33 (YE/VT), harness side and FEM C201f pin 15, circuit 7S-TA33 (YE/VT), harness side.
- Is the resistance less than 5 ohms?
Result / Action to Take
Yes
INSTALL a new FEM. REFER to MODULE COMMUNICATIONS NETWORK .
No
REPAIR the circuit. TEST the system for normal operation.
Test Step
J5 CHECK CIRCUIT 31-TA33 (BK) FOR AN OPEN
- Measure the resistance between brake shift interlock C322 pin 1, circuit 31-TA33 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Result / Action to Take
Yes
INSTALL a new brake shift interlock actuator. REFER to BRAKE SHIFT INTERLOCK ACTUATOR . TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.