B1D87
B1D87-SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCEB1D87-Seat Recliner Motor Control Circuit Performance:
WHEN MONITORED
Whenever the seat motor is activated.
SET CONDITION
If the Memory Seat Module does not detect the rotation of the seat motor this DTC will set. This DTC will only set when the seat switch is moved in the same direction three consecutive times.
POSSIBLE CAUSES
- Seat position sensor circuit diagnostic trouble codes
- (G403) driver seat recliner position sense circuit open
- (G493) driver seat recliner position sensor ground circuit open
- (P141) driver seat recliner up driver
- (P143) driver seat recliner down driver
- Driver recliner seat adjuster motor
- Memory seat module
DIAGNOSTIC TEST
1. CHECK FOR RELATED DIAGNOSTIC TROUBLE CODES
Turn the ignition on.
With the scan tool, read DTC's.
Q: Does the scan tool display any seat position sensor DTC's?
YES: Diagnose and repair the other DTC(s) first.
NO: Go To 2
2. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTC's
Move the Seat Switch in the Recliner position 3 times.
With the scan tool, read DTC's.
Q: Does the scan tool display B1D7B-SEAT BACKREST MOTOR CONTROL CIRCUIT PERFORMANCE?
YES: Go To 3
NO: The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
3. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE VOLTAGE
Disconnect the Driver Recliner Seat Adjuster Motor.
NOTE: Check connectors - Clean and repair as necessary.
Move the Seat Switch in the Recliner position during the next step.
Using a 12-volt test light connect one lead to the (G403) Driver Seat Recliner Position Sense circuit and the other lead to Driver Seat Recliner Position Sensor Ground at the Driver Recliner Seat Adjuster Motor connector.
Q: Does the test light illuminate for approximately 2 seconds then turn off with the seat switch engaged?
YES: Go To 4
NO: Go To 5
4. CHECK THE DRIVER SEAT RECLINER FORWARD/REARWARD DRIVER VOLTAGE
Move the Seat Switch in the Recliner position during the next step.
Using a 12-volt test light connect one lead to the (P141) Driver Seat Recliner Up Driver circuit and the other lead to (P143) Driver Seat Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor connector.
Q: Does the test light illuminate with the seat switch engaged?
YES: Replace the Recliner motor assembly. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
NO: Go To 7
5. CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE WIRE FOR AN OPEN
Disconnect the Memory Seat Module C2 connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance of the (G403) Driver Seat Recliner Position Sense circuit at the Driver Recliner Seat Adjuster Motor connector to the C2 connector.
Q: Is the resistance above 1.0 ohm?
YES: Repair the (G403) Driver Seat Recliner Position Sense circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
NO: Go To 6
6. CHECK THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND FOR AN OPEN
Measure the resistance of the (G493) Driver Seat Recliner Position Sensor Ground circuit at the Driver Recliner Seat Adjuster Motor connector to the C2 connector.
Q: Is the resistance above 1.0 ohm?
YES: Repair the (G493) Driver Seat Recliner Position Senor Ground circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
NO: Replace the Memory Seat Module. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
7. CHECK THE (P141) DRIVER SEAT RECLINER UP DRIVER WIRE FOR AN OPEN
Disconnect the Memory Seat Module C2 connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance of the (P141) Driver Seat Recliner Up Driver circuit at the Driver Recliner Seat Adjuster Motor connector to the C2 connector.
Q: Is the resistance above 1.0 ohm?
YES: Repair the (P141) Driver Seat Recliner Up Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
NO: Go To 8
8. CHECK THE (P143) DRIVER SEAT RECLINER DOWN DRIVER AN OPEN
Measure the resistance of the (P143) Driver Seat Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor connector to the C2 connector.
Q: Is the resistance above 1.0 ohm?
YES: Repair the (P143) Driver Seat Recliner Down Driver circuit for an open. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
NO: Replace the Memory Seat Module. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test