Pinpoint Test C: The Power Seat Is Inoperative - Passenger
Seats
Pinpoint Test C: The Power Seat is Inoperative - Passenger
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number
Normal Operation
The seat control switch is supplied battery voltage on circuit 490 (RD) and ground on circuit 57 (BK). The seat control switch applies voltage and ground directly to the appropriate seat track motor or recliner motor to move the seat.
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
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.
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 FOR VOLTAGE TO PASSENGER SEAT CONTROL SWITCH CIRCUIT 490 (RD)
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Passenger Seat Side Air Bag C316.
- Connect: Restraint System Diagnostic Tool 418-133 to Passenger Seat Side Air Bag C316.
- Disconnect: Passenger Seat Control Switch C627.
- 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. Refer to Battery, Mounting and Cables Battery Disconnect.
- Measure the voltage between passenger seat control switch C627-10, circuit 490 (RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to C2.
No
VERIFY Battery Junction Box (BJB) circuit breaker 601 (20A) 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. Diagrams By Number
DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
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C2 CHECK PASSENGER SEAT CONTROL SWITCH CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between passenger seat control switch C627-6, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. TEST the system for normal operation.
DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C316. CONNECT passenger seat side air bag C316. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
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