Pinpoint Test C: The Power Seat Is Inoperative - Passenger, With Power Recliner
Seats
Pinpoint Tests
Pinpoint Test C: The Power Seat is Inoperative - Passenger, With Power Recliner
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 (GK/YE). When pressed, the seat control switch supplies that voltage and ground to the power seat track motor or power recliner motor to move the seat or backrest. There is one power seat track motor which moves the seat cushion horizontally (forward/rearward) and an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
PINPOINT TEST C: THE POWER SEAT IS INOPERATIVE - PASSENGER, WITH POWER RECLINER
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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C1 CHECK VOLTAGE TO THE PASSENGER SEAT CONTROL SWITCH
- 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 Seat Control Switch C330.
- 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 passenger seat control switch C330-5, circuit SBB21 (GY/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to C2.
No
VERIFY Battery Junction Box (BJB) fuse 21 (30A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. 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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C2 CHECK THE GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between passenger seat control switch C330-3, circuit GD148 (BK/YE), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch - Front Seat Control Switch - 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
REPAIR the 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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