Diagnostic Test

WARNING: This page is about a different car, the 2012 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED DIAGNOSTIC TROUBLE CODES
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display any seat position sensor DTCs?
  
  Yes
  - Diagnose and repair the other DTC(s) first. Refer to DIAGNOSIS AND TESTING .
  No
  - Go To 2.
TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs
3. Move the Seat Switch in the recline position three times.
4. With the scan tool, read the active DTCs.
  Does the scan tool display B1D87-00-SEAT BACKREST MOTOR CONTROL CIRCUIT PERFORMANCE?
  
  Yes
  - Go To 3.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
CHECKING THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT

Fig 1: Measuring Voltage Between Driver Sense Circuit & Ground
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Driver Recliner Seat Adjuster Motor harness connector.
2. Measure the voltage between the (G403) Driver Seat Recliner Position Sense circuit and ground.
  Is the voltage above 11 volts?
  
  Yes
  - Go To 4.
  No
  - Go To 11.
CHECKING THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT

Fig 2: Measuring Voltage Between Driver Sense Circuit & Driver Sensor Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (G403) Driver Seat Recliner Position Sense circuit and the (G493) Driver Seat Recliner Position Sensor Ground circuit.
  Is the voltage above 11 volts?
  
  Yes
  - Go To 5.
  No
  - Go To 12.
CHECKING THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT

Fig 3: Checking Driver Seat Horizontal Rearward Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (P141) Driver Seat Recliner Up Driver circuit and ground.
  Is the voltage above 1 volt?
  
  Yes
  - Go To 13.
  No
  - Go To 6.
CHECKING THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT

Fig 4: Measuring Voltage Between Driver Circuit & Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (P143) Driver Seat Recliner Down Driver circuit and ground.
  Is the voltage above 1 volt?
  
  Yes
  - Go To 14.
  No
  - Go To 7.
CHECKING THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT

Fig 5: Checking Driver Seat Horizontal Rearward Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Connect a 12-volt test light between the (P141) Driver Seat Recliner Up Driver circuit and ground.
2. While observing the test light, move the Driver Seat Recliner Switch in the up position.
  NOTE:
  The test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test lamp illuminate brightly?
  
  Yes
  - Go To 8.
  No
  - Go To 15.
CHECKING THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT

Fig 6: Checking Driver Seat Horizontal Forward Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Connect a 12-volt test light between the (P143) Driver Seat Recliner Down Driver circuit and ground.
2. While observing the test light, move the Driver Seat Recliner Switch in the down position.
  NOTE:
  The test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test lamp illuminate brightly?
  
  Yes
  - Go To 9.
  No
  - Go To 17.
CHECKING THE DRIVER SEAT RECLINER DOWN DRIVER

Fig 7: Checking The Driver Seat Horizontal Rearward Driver
Courtesy of CHRYSLER GROUP, LLC
1. Connect a 12-volt test light between the (P141) Driver Seat Recliner Up Driver circuit and the (P143) Driver Seat Recliner Down Driver circuit.
2. While observing the test light, move the Driver Seat Recliner Switch in the up position.
  NOTE:
  The test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test lamp illuminate brightly?
  
  Yes
  - Go To 10.
  No
  - Go To 19.
CHECKING THE DRIVER SEAT RECLINER UP DRIVER

Fig 8: Checking The Driver Seat Horizontal Rearward Driver
Courtesy of CHRYSLER GROUP, LLC
1. While observing the test light, move the Driver Seat Recliner Switch in the down position.
  NOTE:
  The test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test lamp illuminate brightly?
  
  Yes
  - Replace the Seat Adjuster Recliner Motor Assembly in accordance with the Service Information.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (G403) DRIVER SEAT RECLINER POSITION SENSE CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE

Fig 9: Checking Driver Seat Recliner Position Sense Circuit For Open Or Excessive Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the MSMD C2 harness connector.
3. Measure the resistance of the (G403) Driver Seat Recliner Position Sense circuit between the Driver Seat Recliner Adjuster Motor harness connector and the MSMD harness connector.
  Is the resistance above 10 Ohms?
  
  Yes
  - Repair the open or excessive resistance in the (G403) Driver Seat Recliner Position Sense circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (G493) DRIVER SEAT RECLINER POSITION SENSOR GROUND CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE

Fig 10: Checking Driver Seat Recliner Position Sensor Ground Circuit For Open Or Excessive Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the MSMD C2 harness connector.
3. Measure the resistance of the (G493) Driver Seat Recliner Position Sensor Ground circuit between the Driver Seat Recliner Adjuster Motor harness connector and the MSMD harness connector.
  Is the resistance above 10 Ohms?
  
  Yes
  - Repair the open or excessive resistance in the (G493) Driver Seat Recliner Position Sensor Ground circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

Fig 11: Checking Driver Seat Horizontal Rearward Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the MSMD C2 harness connector.
2. Measure the voltage between the (P141) Driver Seat Recliner Up Driver circuit and ground.
  Is the voltage above 1 volt?
  
  Yes
  - Repair the short to voltage in the (P141) Driver Seat Recliner Up Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

Fig 12: Measuring Voltage Between Driver Circuit & Ground
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the MSMD C2 harness connector.
2. Measure the voltage between the (P143) Driver Seat Recliner Down Driver circuit and ground.
  Is the voltage above 1 volt?
  
  Yes
  - Repair the short to voltage in the (P143) Driver Seat Recliner Down Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT FOR A SHORT TO GROUND

Fig 13: Checking Driver Seat Horizontal Rearward Driver Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the MSMD C2 harness connector.
3. Measure the resistance between ground and the (P141) Driver Seat Recliner Up Driver circuit.
  Is the resistance below 1K Ohms?
  
  Yes
  - Repair the short to ground in the (P141) Driver Seat Recliner Up Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 16.
CHECKING THE (P141) DRIVER SEAT RECLINER UP DRIVER CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE

Fig 14: Checking Driver Seat Recliner Up Driver Circuit For Open Or Excessive Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (P141) Driver Seat Recliner Up Driver circuit between the Driver Seat Recliner Adjuster Motor harness connector and the MSMD harness connector.
  Is the resistance above 10 Ohms?
  
  Yes
  - Repair the open or excessive resistance in the (P141) Driver Seat Recliner Up Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
CHECKING THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT FOR A SHORT TO GROUND

Fig 15: Checking Driver Seat Horizontal Forward Driver Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the MSMD C2 harness connector.
3. Measure the resistance between ground and the (P143) Driver Seat Recliner Down Driver circuit.
  Is the resistance below 1K Ohms?
  
  Yes
  - Repair the short to ground in the (P143) Driver Seat Recliner Down Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 18.
CHECKING THE (P143) DRIVER SEAT RECLINER DOWN DRIVER CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE

Fig 16: Checking Driver Seat Recliner Down Driver Circuit For Open Or Excessive Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (P143) Driver Seat Recliner Down Driver circuit between the Driver Seat Recliner Adjuster Motor harness connector and the MSMD harness connector.
  Is the resistance above 10 Ohms?
  
  Yes
  - Repair the open or excessive resistance in the (P143) Driver Seat Recliner Down Driver circuit.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Go To 19.
MEMORY SEAT MODULE (MSMD)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and harness connectors between the Driver Seat Recliner Adjuster Motor and the MSMD.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Driver Seat Recliner Adjuster Motor and MSMD harness connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Replace the MSMD in accordance with the Service Information.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE - POWER SEAT SYSTEM VERIFICATION TEST .