Pinpoint Test D: The Power Seat Does Not Recline - Driver

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE FORWARD RECLINE CIRCUIT
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered.

NOTE: The air bag warning lamp illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- For vehicles equipped with seat side air bags, carry out the following:
  - Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING in the General Procedures.
  - Disconnect the driver seat side air bag C315.
  - Connect restraint system diagnostic tool 418-133 to the driver seat side air bag C315.
  - Connect the battery ground cable.
- Disconnect: Recline Motor C368.
- Measure the resistance between seat backrest power recline motor C368-1, circuit 918 (GY), harness side and ground.
  
  Fig 1: Measuring Resistance Between Seat Backrest Power Recline Motor C368-1, Circuit 918 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to D3.

No : GO to D2.
D2 CHECK CIRCUIT 918 (GY) FOR AN OPEN
- Disconnect: Driver Seat Control Switch C519.
- Measure the resistance between seat backrest power recline motor C368-1, circuit 918 (GY), harness side and driver seat control switch C519-2, circuit 918 (GY), harness side.
  
  Fig 2: Checking Circuit 918 (GY) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH . TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

No : REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
D3 CHECK THE RECLINE FORWARD SUPPLY
- Measure the voltage between seat backrest power recline motor C368-1, circuit 918 (GY), harness side and ground.
  
  Fig 3: Measuring Voltage Between Seat Backrest Power Recline Motor C368-1, Circuit 918 And Ground
  Courtesy of FORD MOTOR CO.
- Actuate the seat control switch to the RECLINE FORWARD position.
- Is the voltage greater than 10 volts?
Yes : GO to D5.

No : GO to D4.
D4 CHECK CIRCUIT 918 (GY) FOR A SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C519.
- Measure the resistance between seat backrest power recline motor C368-1, circuit 918 (GY), harness side and ground.
  
  Fig 4: Measuring Resistance Between Seat Backrest Power Recline Motor C368-1, Circuit 918 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH . TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

No : REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
D5 CHECK THE REARWARD RECLINE CIRCUIT
- Measure the resistance between seat backrest power recline motor C368-2, circuit 919 (GY/BK), harness side and ground.
  
  Fig 5: Measuring Resistance Between Seat Backrest Power Recline Motor C368-2, Circuit 919 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to D7.

No : GO to D6.
D6 CHECK CIRCUIT 919 (GY/BK) FOR AN OPEN
- Disconnect: Driver Seat Control Switch C519.
- Measure the resistance between seat backrest power recline motor C368-2, circuit 919 (GY/BK), harness side and driver seat control switch C519-3, circuit 919 (GY/BK), harness side.
  
  Fig 6: Measuring Resistance Between Seat Backrest Power Recline Motor C368-2 And Driver Seat Control Switch C519-3
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH . TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

No : REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
D7 CHECK THE RECLINE REARWARD SUPPLY
- Measure the voltage between seat backrest power recline motor C368-2, circuit 919 (GY/BK), harness side and ground.
  
  Fig 7: Measuring Voltage Between Seat Backrest Power Recline Motor C368-2, Circuit 919 And Ground
  Courtesy of FORD MOTOR CO.
- Actuate the seat control switch to the RECLINE REARWARD position.
- Is the voltage greater than 10 volts?
Yes : INSTALL a new seat backrest power recliner. REFER to SEAT RECLINER - POWER . TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

No : GO to D8.
D8 CHECK CIRCUIT 919 (GY/BK) FOR A SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C519.
- Measure the resistance between seat backrest power recline motor C368-2, circuit 919 (GY/BK), harness side and ground.
  
  Fig 8: Measuring Resistance Between Seat Backrest Power Recline Motor C368-2, Circuit 919 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH . TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

No : REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .