PINPOINT TEST Q : The DCSM Does Not Respond To The Scan Tool
NOTE:
Failure to disconnect the battery when instructed will result in false resistance readings. REFER to Battery, Mounting and Cables
- Q1 CHECK THE DCSM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: DCSM C3265A.
- Ignition ON.
Are the voltages greater than 11 volts?
Yes GO to Q2. No VERIFY the BJB fuse 28 (30A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short. - Q2 CHECK THE DCSM GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure:
Positive Lead Measurement / Action Negative Lead C3265A-M Ground
Is the resistance less than 3 ohms?
Yes GO to Q3. No REPAIR the circuit. - Q3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DCSM AND THE DLC FOR AN OPEN
- Disconnect: DCSM C3265C.
Are the resistances less than 3 ohms?
Yes CONNECT the negative battery cable. GO to Q4. No REPAIR the circuit in question. - Q4 CHECK FOR CORRECT DCSM OPERATION
- Ignition OFF.
- Disconnect and inspect the DCSM connectors and related in-line connectors.
- Repair:
- corrosion (replace connector or terminals - clean module pins)
- damaged or bent pins - replace terminals/pins
- pushed-out pins - replace pins as necessary
- Reconnect the DCSM connectors and related in-line connectors. Make sure they seat and latch correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new DCSM. REFER to Seating 1st Row . No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
