Pinpoint Test A: The Power Seat Is Inoperative

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

A1 CHECK THE GROUND CIRCUIT FOR AN OPEN
WARNING: The restraint system diagnostic tool is for restraint system repair only. Remove from the vehicle prior to road use. Failure to remove could result in personal injury and possible violation of vehicle safety standards. Failure to follow these instructions may result in personal injury.

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

NOTE: The air bag warning lamp illuminates when the restraint control module (RCM) fuse is removed and the key is in the ON position. This is normal operation and does not indicate an SRS fault.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Key in OFF position.
- Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- For vehicles equipped with seat side air bags, carry out the following:
  - Disconnect the driver seat side air bag C367. Connect the restraint system diagnostic tool 418-133.
- Disconnect the driver safety belt pretensioner electrical connector at the pretensioner.
- Connect the battery. Refer to BATTERY, MOUNTING AND CABLES .
- Disconnect: Seat Control Switch C352.
- Measure the resistance between seat control switch C352-E, circuit 57 (BK) harness side and ground.
  
  Fig 1: Checking Ground Circuit For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to A2.

No : REPAIR the circuit. DISCONNECT the battery. If equipped, REMOVE the restraint system diagnostic tool and CONNECT the driver seat side air bag connector. CONNECT the driver safety belt pretensioner electrical connector. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING . TEST the system for normal operation.
A2 CHECK THE VOLTAGE TO THE SEAT CONTROL SWITCH
- For vehicles equipped with seat side air bags, carry out the following:
  - Disconnect the driver seat side air bag C367. Connect the restraint system diagnostic tool 418-133.
- Disconnect the driver safety belt pretensioner electrical connector at the pretensioner.
- Connect the battery. Refer to BATTERY, MOUNTING AND CABLES .
- Measure the voltage between seat control switch C352-H, circuit 171 (BK/WH) harness side and ground.
  
  Fig 2: Checking Voltage To Seat Control Switch
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : INSTALL a new seat control switch. REFER to SEAT CONTROL SWITCH in this article. DISCONNECT the battery. If equipped, REMOVE the restraint system diagnostic tool and CONNECT the driver seat side air bag connector. CONNECT the driver safety belt pretensioner electrical connector. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING . TEST the system for normal operation.

No : VERIFY smart junction box (SJB) fuse 9 (30A) is OK. If OK, REPAIR the circuit. DISCONNECT the battery. If equipped, REMOVE the restraint system diagnostic tool and CONNECT the driver seat side air bag connector. CONNECT the driver safety belt pretensioner electrical connector. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING . TEST the system for normal operation.