B1D75
B1D75-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT LOW
- When Monitored:
Continuously.
- Set Condition:
If Voltage on the (G402) Driver Seat Rear Vertical Position Sense circuit is not within a specified range.
1. CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Cycle the ignition from on to off three times.
4. Turn the ignition on and wait 30 seconds.
5. Using a scan tool, read DTCs.
Is DTC B1D75-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT LOW active?
Yes
- Go To 3
No
- Go To 2
2. CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT
1. Move the seat switch in the rear vertical adjust position three times.
2. Using a scan tool, read DTCs.
Is DTC B1D75-SEAT REAR VERTICAL POSITION SENSOR CIRCUIT LOW active?
Yes
- Go To 3
No
- The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.
3. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the MSM C3 connector.
3. Disconnect the Rear Driver Vertical Seat Adjuster Motor connector.
NOTE: Check connectors. Clean and repair as necessary.
4. Measure the resistance of the (G402) Driver Seat Rear Vertical Position Sense circuit between ground and the Rear Driver Vertical Seat Adjuster Motor connector.
Is the resistance below 10K Ohms?
Yes
- Repair the (G402) Driver Seat Rear Vertical Position Sense circuit for a short to ground.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.
No
- Go To 4
4. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT, (P111) DRIVER SEAT REAR VERTICAL UP DRIVER CIRCUIT, AND (P113) DRIVER SEAT REAR VERTICAL DOWN DRIVER CIRCUIT
1. Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Rear Driver Vertical Seat Adjuster Motor connector.
2. Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (P111) Driver Seat Rear Vertical Up Driver circuit at the Rear Driver Vertical Seat Adjuster Motor connector.
3. Measure the resistance between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (P113) Driver Seat Rear Vertical Down Driver circuit at the Rear Driver Vertical Seat Adjuster Motor connector.
Is the resistance below 10K Ohms for any measurement?
Yes
- Repair all circuits with a resistance below 10K Ohms for a short to the (G402) Driver Seat Rear Vertical Position Sense circuit.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.
No
- Go To 5
5. CHECK THE (G402) DRIVER SEAT REAR VERTICAL POSITION SENSE CIRCUIT AND THE (G492) DRIVER SEAT REAR VERTICAL SENSOR GROUND CIRCUIT FUNCTION
1. Reconnect the MSM C3 connector.
2. Disconnect the scan tool.
3. Turn off all vehicle interior and exterior lighting.
4. Mark sure all doors are closed then wait 10 seconds.
5. Connect a 12-Volt test light between the (G402) Driver Seat Rear Vertical Position Sense circuit and the (G492) Driver Seat Rear Vertical Sensor Ground circuit at the Rear Driver Vertical Seat Adjuster Motor connector.
6. Move the seat switch in the rear vertical adjust position then release the switch.
Does the test light illuminate for approximately five seconds then turn off?
Yes
- Replace the Rear Driver Vertical Seat Adjuster Motor assembly.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.
No
- Replace the Memory Seat Module (MSM).
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.