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HOMESERVICE MANUALSDODGE AND RAM2005MAGNUM R/T, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATSPOWER SEAT SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1D87 - SEAT RECLINER MOTOR CONTROL CIRCUIT PERFORMANCEDIAGNOSTIC TEST

2005 Dodge and Ram Magnum R/T, AWD

Diagnostic Test

2005 Dodge and Ram Magnum R/T, AWDSECTION Diagnostic Test

1) CHECK FOR RELATED DIAGNOSTIC TROUBLE CODES
Turn the ignition on.

With the scan tool, read DTC's.

Does the scan tool display any seat position sensor DTC's?

Yes
1. Diagnose and repair the other DTC(s) first. Refer to appropriate test in this article for a complete list of symptoms.
No
1. Go To step 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.

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

Yes
1. Go To step 3).
No
1. 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.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
3) CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE VOLTAGE

Fig 1: Checking Driver Seat Recliner Position Sense For Voltage
Courtesy of DAIMLERCHRYSLER CORP.

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.

Does the test light illuminate for approximately 2 seconds then turn off with the seat switch engaged?

Yes
1. Go To step 4).
No
1. Go To step 5).
4) CHECK THE DRIVER SEAT RECLINER FORWARD/REARWARD DRIVER VOLTAGE

Fig 2: Checking Driver Seat Recliner Forward/Rearward Driver For Voltage
Courtesy of DAIMLERCHRYSLER CORP.

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.

Does the test light illuminate with the seat switch engaged?

Yes
1. Replace the Recliner motor assembly.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
No
1. Go To step 7).
5) CHECK THE (G403) DRIVER SEAT RECLINER POSITION SENSE WIRE FOR AN OPEN

Fig 3: Checking Driver Seat Recliner Position Sense Wire For Open
Courtesy of DAIMLERCHRYSLER CORP.

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.

Is the resistance above 1.0 ohm?

Yes
1. Repair the (G403) Driver Seat Recliner Position Sense circuit for an open.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
No
1. Go To step 6).
6) CHECK THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND FOR AN OPEN

Fig 4: Checking Driver Seat Recliner Position Sensor Ground For Open
Courtesy of DAIMLERCHRYSLER CORP.

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.

Is the resistance above 1.0 ohm?

Yes
1. Repair the (G493) Driver Seat Recliner Position Senor Ground circuit for an open.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
No
1. Replace the Memory Seat Module.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
7) CHECK THE (P141) DRIVER SEAT RECLINER UP DRIVER WIRE FOR AN OPEN

Fig 5: Checking Driver Seat Recliner Up Driver Wire For Open
Courtesy of DAIMLERCHRYSLER CORP.

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.

Is the resistance above 1.0 ohm?

Yes
1. Repair the (P141) Driver Seat Recliner Up Driver circuit for an open.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
No
1. Go To step 8).
8) CHECK THE (P143) DRIVER SEAT RECLINER DOWN DRIVER AN OPEN

Fig 6: Checking Driver Seat Recliner Down Driver Open
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance of the (P143) Driver Seat Recliner Down Driver circuit at the Driver Recliner Seat Adjuster Motor connector to the C2 connector.

Is the resistance above 1.0 ohm?

Yes
1. Repair the (P143) Driver Seat Recliner Down Driver circuit for an open.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .
No
1. Replace the Memory Seat Module.
2. Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1 .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.