Diagnostic Routine O
Diagnostic Routine O
Diagnostic Overview
B103B, B1111
Refer to Wiring Diagram Set 119 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
Pinpoint Test
NOTICE: When taking measurements at DCSM (Dual Climate Controlled Seat Module) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in DTCs (Diagnostic Trouble Codes) and system failure. Touching the tip of these connector pins is recommended instead.
1. CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND
1. WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
Ignition OFF.
2. Disconnect: Driver Seat Side Air Bag C3051.
3. Disconnect: Passenger Seat Side Air Bag C339.
4. Disconnect: DCSM (Dual Climate Controlled Seat Module) C3265A.
5. Measure:
Are the resistances greater than 10,000 ohms?
2. CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
1. Ignition ON.
2. Measure:
Is any voltage present?
3. CHECK THE TED (Thermo-Electric Device) RESISTANCE
1. Ignition OFF.
2. NOTICE: Make sure the TEDs (Thermo-Electric Devices) are at room temperature and there is no air blowing across the TEDs (Thermo-Electric Devices). Do not handle a TED (Thermo-Electric Device) when measuring resistance. These conditions can cause incorrect readings and lead to incorrect identification of components that are not damaged.
Measure:
Are the resistances between 0.9 and 10 ohms?
4. CHECK THE RESISTANCE OF THE BACKREST TED (Thermo-Electric Device)
1. Disconnect: Driver Seat Backrest TED (Thermo-Electric Device) C3034.
2. Measure:
Is the resistance between 0.9 and 10 ohms?
5. CHECK THE RESISTANCE OF THE CUSHION TED (Thermo-Electric Device)
1. Disconnect: Driver Seat Cushion TED (Thermo-Electric Device) C3035.
2. Measure:
Is the resistance between 0.9 and 10 ohms?
6. CHECK THE CUSHION TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND
1. Disconnect: Driver Cushion TED (Thermo-Electric Device) C3035.
2. Measure:
Are the resistances greater than 10,000 ohms?
7. CHECK THE BACKREST TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND
1. Disconnect: Driver Seat Backrest TED (Thermo-Electric Device) C3034.
2. Measure:
Are the resistances greater than 10,000 ohms?
8. CHECK THE CUSHION TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Disconnect: Driver Cushion TED (Thermo-Electric Device) C3035.
3. Ignition ON.
4. Measure:
Is any voltage present on either circuit?
9. CHECK THE BACKREST TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Disconnect: Driver Backrest TED (Thermo-Electric Device) C3034.
3. Ignition ON.
4. Measure:
Is any voltage present?
10. CHECK FOR CORRECT DCSM (Dual Climate Controlled Seat Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all DCSM (Dual Climate Controlled Seat Module) connectors.
3. Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out pins - install new pins as necessary
4. Reconnect the DCSM (Dual Climate Controlled Seat Module) connectors. Make sure they seat and latch correctly.
5. Connect: Driver Seat Backrest TED (Thermo-Electric Device) C3034 (if previously disconnected).
6. Connect: Driver Seat Cushion TED (Thermo-Electric Device) C3035 (if previously disconnected).
7. Operate the system and determine if the concern is still present.
Is the concern still present?
11. CHECK FOR SRS (Supplemental Restraint System) DTCs (Diagnostic Trouble Codes)
1. WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
Ignition OFF.
2. Connect: Driver Seat Side Air Bag C3051.
3. Connect: Passenger Seat Side Air Bag C339.
4. Connect: DCSM (Dual Climate Controlled Seat Module) C3265A (if previously disconnected).
5. Connect: Driver Seat Backrest TED (Thermo-Electric Device) C3034 (if previously disconnected).
6. Connect: Driver Seat Cushion TED (Thermo-Electric Device) C3035 (if previously disconnected).
7. Ignition ON.
8. Using a scan tool, clear the RCM (Restraints Control Module) DTCs (Diagnostic Trouble Codes).
9. Cycle the ignition OFF then ON.
10. Using a scan tool, perform RCM (Restraints Control Module) self-test.
Are any RCM (Restraints Control Module) DTCs (Diagnostic Trouble Codes) retrieved during self-test?
