Pinpoint Test G: The Power Seat Does Not Move Horizontally/Recline - Passenger
Seats
Pinpoint Tests
Pinpoint Test G: The Power Seat Does Not Move Horizontally/Recline - Passenger
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number
Normal Operation
The passenger seat control switch is supplied battery voltage on circuit SBB21 (GY/RD) and ground on circuit GD148 (BK/YE). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There is a power seat track motor that moves the seat horizontally (forward/reverse) and a motor in the power recliner mechanism that moves the seat backrest forward or rearward.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Power seat motor (seat track)
PINPOINT TEST G: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/RECLINE - PASSENGER
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.
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G1 CHECK THE PASSENGER SEAT MOTOR OPERATION
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag C3227.
- Disconnect: Passenger Safety Belt Buckle Pretensioner C3066.
- Disconnect: Passenger Power Seat Motor C332 or Seat Recliner Motor C3189 (inoperative motor in question).
- 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 the voltage between the seat horizontal or recliner motorC332/C3189, harness side and ground while moving the seat control switch in the indicated direction using the following chart:
- Are all voltages greater than 10 volts?
Yes
INSTALL a new passenger seat track assembly or recliner assembly. REFER to Seat Track - Front Seat Track - Front or Seat Recliner - Front Seat Recliner - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C3227.
CONNECT passenger seat safety belt buckle pretensioner C3066.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to G2.
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G2 CHECK THE PASSENGER SEAT MOTOR CIRCUITS FOR A SHORT TO GROUND
- Disconnect: Passenger Seat Control Switch C330.
- Measure the resistance between passenger seat control switch C330, harness side and ground using the following chart:
- Are the resistances greater than 10,000 ohms?
Yes
GO to G3.
No
REPAIR the affected circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C3227.
CONNECT passenger seat safety belt buckle pretensioner C3066.
REPOWER the SRS. REFER to Air Bag Systems.
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G3 CHECK THE PASSENGER SEAT MOTOR CIRCUITS FOR AN OPEN
- Measure the resistance between passenger seat switch C330, harness side and horizontal motor C332, harness side or Recliner motor C3189, harness side using the following chart:
- Are the resistances less than 5 ohms?
Yes
INSTALL a new passenger seat control switch. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C3227.
CONNECT passenger seat safety belt buckle pretensioner C3066.
REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the affected circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C3227.
CONNECT passenger seat safety belt buckle pretensioner C3066.
REPOWER the SRS. REFER to Air Bag Systems.
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