Pinpoint Test F: The Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool
WARNING: This page is about a different car, the 2005 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- F1 CHECK THE RCM C310A FOR DAMAGE
- Depower the air bag system, Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect: RCM C310a.
- Inspect the RCM C310a for damage.
- Is the RCM C310a OK?
- Yes : GO to F2.
- No : REPAIR the RCM C310a. CONNECT the RCM C310a. REPOWER the air bag system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the diagnostic tool data link test.
- F2 CHECK CIRCUIT 70 (LB/WH) BETWEEN THE RCM C310A AND THE DATA LINK CONNECTOR (DLC) C251 FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the DLC C251 pin 7, circuit 70 (LB/WH), harness side and the RCM C310a pin 11, circuit 70 (LB/WH), harness side.
- Is the resistance less than 5 ohms?
- Yes : GO to F3.
- No : REPAIR the circuit. CONNECT the RCM C310a. REPOWER the air bag system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the diagnostic tool data link test.
- F3 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new RCM. REPOWER the air bag system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the diagnostic tool data link test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.