Pinpoint Test G: The Passenger Power Seat Does Not Move Horizontally/Recline (With Power Recliner): Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

G1 CHECK THE PASSENGER SEAT MOTOR OPERATION

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. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .

NOTE: The air bag warning lamp illuminates when the 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.

Key in OFF position.

WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.

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 portion of SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect driver seat side air bag C3227.
- Connect restraint system diagnostic tool 418-133 to driver seat side air bag C3227.
- Connect the battery ground cable.
Disconnect the passenger seat motor connector in question: (horizontal motor C332 or seat recliner motor C3189).

Using the following table, measure the voltage between the inoperative passenger seat motor connector, harness side and ground, while moving the seat control switch in the indicated direction:

PIN CONNECTOR CIRCUIT REFERENCE

Motor Connector	Pin	Circuit	Direction of Control Switch
Horizontal Motor C332	2	986 (YE/WH)	FORWARD
Horizontal Motor C332	1	987 (RD/WH)	REARWARD
Recliner Motor C3189	1	988 (YE/LG)	FORWARD
Recliner Motor C3189	2	989 (RD/LG)	REARWARD

Fig 1: Checking Passenger Seat Motor Operation

Courtesy of FORD MOTOR CO.

Are the voltages greater than 10 volts in the inoperative directions?

Result/ Action to Take

Yes : INSTALL a new passenger seat track assembly or backrest frame assembly. 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 passenger seat side air bag module C3227. CONNECT passenger seat side air bag module C3227. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
No : GO to G2.

G2 CHECK THE PASSENGER SEAT MOTOR CIRCUITS FOR A SHORT TO GROUND

Disconnect: Passenger Seat Control Switch C330.

Using the following table, measure the resistance between passenger seat control switch C330 pins, harness side and ground:

PIN CONNECTOR CIRCUIT REFERENCE

Pin	Circuit	Inoperative Motor
8	989 (RD/LG)	Recliner
11	988 (YE/LG)	Recliner
4	986 (YE/WH)	Horizontal
9	987 (RD/WH)	Horizontal

Fig 2: Checking Passenger Seat Motor Circuits For A Short To Ground

Courtesy of FORD MOTOR CO.

Are the resistances greater than 10,000 ohms?

Yes : GO to G3.
No : REPAIR the affected 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 passenger seat side air bag module C3227. CONNECT passenger seat side air bag module C3227. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

G3 CHECK FOR AN OPEN CIRCUIT

Key in OFF position.

Measure the resistance between passenger seat control switch C330 pins, harness side and the inoperative motor connector, harness side:

PIN CONNECTOR CIRCUIT REFERENCE

C330 Pin	Circuit	Motor Connector
Horizontal Motor
4	986 (YE/WH)	C332 pin 2
9	987 (RD/WH)	C332 pin 1
Recliner Motor
8	989 (RD/LG)	C338 pin 2
11	988 (YE/LG)	C338 pin 1

Fig 3: Measuring Resistance Between Passenger Seat Control Switch C330 Pins And Inoperative Motor Connector

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : INSTALL a new passenger 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 passenger seat side air bag module C3227. CONNECT passenger seat side air bag module C3227. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
No : REPAIR the affected 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 passenger seat side air bag module C3227. CONNECT passenger seat side air bag module C3227. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .