PINPOINT TEST AL : The Heated Steering Wheel Module (HSWM) 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
- AL1 CHECK THE HSWM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: HSWM C2406.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C2406-1 Ground
Is the voltage greater than 11 volts?
Yes GO to AL2. No VERIFY the BCM fuse 36 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short. - AL2 CHECK THE HSWM GROUND CIRCUITS FOR AN OPEN
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C2406-14 Ground
Is the resistance less than 3 ohms?
Yes GO to AL3. No REPAIR the circuit. - AL3 CHECK THE MS-CAN CIRCUITS BETWEEN THE HSWM AND THE DLC FOR AN OPEN
Are the resistances less than 3 ohms?
Yes CONNECT the negative battery cable. GO to AL4. No REPAIR the circuit in question. - AL4 CHECK FOR CORRECT HSWM OPERATION
- Ignition OFF.
- Disconnect and inspect the HSWM connector 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 HSWM connector 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 HSWM. REFER to Steering Column . No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
