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B1D7B






B1D7B-SEAT HORIZONTAL MOTOR CONTROL CIRCUIT PERFORMANCE





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Whenever the seat motor is activated.

- Set Condition:
The seat switch is pressed three times in opposite directions (e.g. either, horizontal forward, horizontal rearward, and horizontal forward, or horizontal rearward, horizontal forward, and horizontal rearward) and each switch activation is for at least one second and the Memory Seat Module (MSM) does not detect seat motor rotation in either direction.





1. CHECK FOR SEAT POSITION SENSOR DIAGNOSTIC TROUBLE CODES (DTCs)
1. Turn the ignition on.
2. Using a scan tool, read DTCs.

Does the scan tool display any seat position sensor DTCs?

Yes

- Diagnose and repair all seat position sensor DTCs. Testing and Inspection.

No

- Go To 2

2. TEST FOR INTERMITTENT CONDITION
1. Using a scan tool, record and erase DTCs.
2. Press the seat switch in one horizontal adjustment direction for at least one second then release the switch. Repeat three times consecutively, but press the switch in the opposite direction each time.
3. Using a scan tool, read DTCs.

Does the scan tool display DTC B1D7B-SEAT HORIZONTAL MOTOR CONTROL CIRCUIT PERFORMANCE?

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 (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT AND THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FUNCTION




1. Turn the ignition off.
2. Disconnect the Driver Horizontal Seat Adjuster Motor connector.

NOTE: Check connectors - Clean and repair as necessary.

3. Turn the ignition on.
4. Connect a 12-volt test light connect between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit at the Driver Horizontal Seat Adjuster Motor connector.
5. Move the seat switch in the horizontal adjust position.

Does the test light illuminate for approximately two seconds then turn off with the seat switch engaged?

Yes

- Go To 4

No

- Go To 5

4. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT AND THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FUNCTION




1. Connect a 12-volt test light between the (P115) Driver Seat Horizontal Forward Driver circuit and the (P117) Driver Seat Horizontal Rearward Driver circuit at the Driver Horizontal Seat Adjuster Motor connector.
2. Move the seat switch in the horizontal adjust position.

Does the test light illuminate with the seat switch engaged?

Yes

- Replace the Seat Track Horizontal Motor assembly.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

No

- Go To 7

5. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the Memory Seat Module C3 connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the resistance of the (G401) Driver Seat Horizontal Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and the Memory Seat Module C3 connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 6

No

- Repair the (G401) Driver Seat Horizontal Position Sense circuit for an open.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

6. CHECK THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FOR AN OPEN




1. Measure the resistance of the (G491) Driver Seat Horizontal Sensor Ground circuit between the Driver Horizontal Seat Adjuster Motor connector and the Memory Seat Module C3 connector.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Memory Seat Module (MSM).
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

No

- Repair the (G491) Driver Seat Horizontal Senor Ground circuit for an open.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

7. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the Memory Seat Module C3 connector.

NOTE: Check connectors. Clean and repair as necessary.

3. Measure the resistance of the (P115) Driver Seat Horizontal Forward Driver circuit between the Driver Horizontal Seat Adjuster Motor connector and the Memory Seat Module C3 connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 8

No

- Repair the (P115) Driver Seat Horizontal Forward Driver circuit for an open.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

8. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FOR AN OPEN




1. Measure the resistance of the (P117) Driver Seat Horizontal Rearward Driver circuit between the Driver Horizontal Seat Adjuster Motor connector and the Memory Seat Module C3 connector.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Memory Seat Module (MSM).
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

No

- Repair the (P117) Driver Seat Horizontal Rearward Driver circuit for an open.
- Perform POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

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