Pinpoint Test F : The Power Seat Does Not Move Horizontally/Vertically - Driver

Seats

Pinpoint Tests

Pinpoint Test F : The Power Seat Does Not Move Horizontally/Vertically - Driver

Refer to Wiring Diagram Set 120, Seating for schematic and connector information. Diagrams By Number

Normal Operation

The seat control switch supplies battery voltage and ground to 1 of 3 power seat track motors through horizontal motor circuits 980 (YE/WH) and 981 (RD/WH), front height motor circuits 979 (RD/LB) and 990 (YE/LB) or rear height motor circuits 982 (YE/LG) and 983 (RD/LG) to move the seat in the desired direction.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track motor

PINPOINT TEST F: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - DRIVER

WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTICE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

-------------------------------------------------
F1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the driver seat control switch to the forward and rearward positions.
- Does the seat move horizontally?

Yes
GO to F2.

No
GO to F9.

-------------------------------------------------
F2 DETERMINE SEAT HEIGHT ADJUST FAILURE

- Determine the seat height adjust failure.
- Does the seat front or rear height adjust up and down?

Yes
If only the front height adjust operates, GO to F3.

If only the rear height adjust operates, GO to F6.

No
INSTALL a new seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.

-------------------------------------------------
F3 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Connect: Restraint System Diagnostic Service Tool 418-133 to Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable.
- Measure voltage between driver power seat motor assembly C353-8, circuit 983 (RD/LG) and C353-2, circuit 982 (YE/LG), harness side, while operating the seat control switch rear height up and down.

- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F4.

-------------------------------------------------
F4 CHECK CIRCUIT 983 (RD/LG) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between driver seat control switch C360-5, circuit 983 (RD/LG), harness side and driver power seat motor assembly C353-8, circuit 983 (RD/LG), harness side.

- Is resistance less than 5 ohms?

Yes
GO to F5.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

-------------------------------------------------
F5 CHECK CIRCUIT 982 (YE/LG) FOR AN OPEN

- Measure resistance between driver seat control switch C360-7, circuit 982 (YE/LG), harness side and driver power seat motor assembly C353-2, circuit 982 (YE/LG), harness side.

- Is resistance less than 5 ohms?

Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

-------------------------------------------------
F6 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Connect: Restraint System Diagnostic Service Tool 418-133 to Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable.
- Measure voltage between driver power seat motor assembly C353-1, circuit 979 (RD/LB) and C353-7, circuit 990 (YE/LB), harness side while operating the driver seat control switch front height up and down.

- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F7.

-------------------------------------------------
F7 CHECK CIRCUIT 979 (RD/LB) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between driver seat control switch C360-1, circuit 979 (RD/LB), harness side and driver power seat motor assembly C353-1, circuit 979 (RD/LB), harness side.

- Is resistance less than 5 ohms?

Yes
GO to F8.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

-------------------------------------------------
F8 CHECK CIRCUIT 990 (YE/LB) FOR AN OPEN

- Measure resistance between driver seat control switch C360-8, circuit 990 (YE/LB), harness side and driver power seat motor assembly C353-7, circuit 990 (YE/LB), harness side.

- Is resistance less than 5 ohms?

Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

-------------------------------------------------
F9 CHECK VOLTAGE TO THE HORIZONTAL MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Connect: Restraint System Diagnostic Service Tool 418-133 to Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable.
- Measure voltage between driver power seat motor assembly C353-3, circuit 981 (RD/WH) and C353-5, circuit 980 (YE/WH), harness side while operating the seat control switch forward and rearward.

- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F10.

-------------------------------------------------
F10 CHECK CIRCUIT 981 (RD/WH) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between driver seat control switch C360-6, circuit 981 (RD/WH), harness side and driver power seat motor assembly C353-3, circuit 981 (RD/WH), harness side.

- Is resistance less than 5 ohms?

Yes
GO to F11.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the Restraint System Diagnostic Service Tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Air Bag Systems.

-------------------------------------------------
F11 CHECK CIRCUIT 980 (YE/WH) FOR AN OPEN

- Measure resistance between driver seat control switch C360-3, circuit 980 (YE/WH), harness side and driver power seat motor assembly C353-5, circuit 980 (YE/WH), harness side.