Pinpoint Test B: the Power Seat Is Inoperative - Driver

Seats


Pinpoint Tests

Pinpoint Test B: The Power Seat is Inoperative - Driver

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

Normal Operation

The seat control switch receives voltage on circuit 490 (RD) and is supplied 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 B: THE POWER SEAT IS INOPERATIVE - 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.

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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B1 CHECK FOR VOLTAGE TO DRIVER SEAT CONTROL SWITCH CIRCUIT 490 (RD)


- 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 C315.
- Connect: Restraint System Diagnostic Tool 418-133 to Driver Seat Side Air Bag C315.
- Disconnect: Driver Seat Control Switch C519.
- 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 driver seat control switch C519-10, circuit 490 (RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to B2.

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. DISCONNECT the battery ground cable.

DISCONNECT the restraint system diagnostic tool from driver seat side air bag C315. CONNECT driver seat side air bag C315. REPOWER the SRS. REFER to Air Bag Systems.

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B2 CHECK DRIVER SEAT CONTROL SWITCH GROUND CIRCUIT 57 (BK) FOR AN OPEN


- Measure the resistance between driver seat control switch C519-6, circuit 57 (BK), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new 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 tool from driver seat side air bag C315. CONNECT driver seat side air bag C315. 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 tool from driver seat side air bag C315. CONNECT driver seat side air bag C315. REPOWER the SRS. REFER to Air Bag Systems.

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