Pinpoint Test C: No Communication With The Driver Seat Module (DSM)
Test Step
C1 CHECK CIRCUIT 797 (LG/VT) FOR VOLTAGE
- Key in OFF position.
- Disconnect: DSM C341c.
- Key in ON position.
- Measure the voltage between DSM C341c pin 14, circuit 797 (LG/VT), harness side and ground.
- Is the voltage greater than 10 volts?
Result / Action to Take
Yes
GO to C2.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
C2 CHECK CIRCUIT 490 (RD) FOR VOLTAGE
- Disconnect: DSM C341a.
- Measure the voltage between DSM C341a pin 1, circuit 490 (RD), harness side and ground.
- Is the voltage greater than 10 volts?
Result / Action to Take
Yes
GO to C3.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
C3 CHECK CIRCUIT 676 (PK/OG) FOR AN OPEN
- Measure the resistance between DSM C341c pin 1, circuit 676 (PK/OG), harness side and ground.
- Is the resistance less than 5 ohms?
Result / Action to Take
Yes
GO to C4.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
C4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between DSM C341a pin 2, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Result / Action to Take
Yes
GO to C5.
No
REPAIR the circuit. REPEAT the self-test.
Test Step
C5 CHECK FOR CORRECT DSM OPERATION
- Disconnect all DSM connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all DSM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Result / Action to Take
Yes
INSTALL a new DSM. REFER to MODULE-DRIVER SEAT (DSM) . TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.