Pinpoint Test K: The Power Seat Does Not Move Horizontally/Vertically - Passenger, With Manual Recliner

Seats

Pinpoint Test K: The Power Seat Does Not Move Horizontally/Vertically - Passenger, With Manual Recliner

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

Normal Operation

The passenger seat control switch is powered by battery voltage on circuit SBB29 (GY/RD) and is supplied ground on circuit GD138 (BK/WH). 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 are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor needs to be installed, it is necessary to install an entire power seat track.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Seat control switch

- Seat track motor (seat track)

PINPOINT TEST K : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - PASSENGER, WITH MANUAL RECLINER

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

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

K1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the passenger power seat forward and rearward.

Will the seat move horizontally?

Yes
GO to K5.

No
GO to K2.

K2 CHECK FOR VOLTAGE TO THE HORIZONTAL MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3050.

- Disconnect: Passenger Seat Side Air Bag C3052.

- Disconnect: Passenger Seat Horizontal Motor C332.

- 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 horizontal motor C332-3, circuit CPS38 (GN/BU), harness side and C332-4, circuit CPS33 (WH), harness side, while pushing the passenger seat control switch forward and rearward.

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

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to K3.

K3 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C355.

- Measure the resistance between passenger seat control switch C355-6, circuit CPS38 (GN/BU), harness side and passenger seat horizontal motor C332-3, circuit CPS38 (GN/BU), harness side.

Is the resistance less than 5 ohms?

Yes
GO to K4.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C355-3, circuit CPS33 (WH), harness side and passenger seat horizontal motor C332-4, circuit CPS33 (WH), harness side.

Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K5 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

- Operate the front and rear seat height adjustments.

Does the seat front and rear height adjust up and down?

Yes
If only front height adjust operates, GO to K6.

If only rear height adjust operates, GO to K9.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K6 CHECK FOR VOLTAGE TO THE REAR HEIGHT MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3050.

- Disconnect: Passenger Seat Side Air Bag C3052.

- Disconnect: Passenger Seat Rear Height Motor C3075.

- 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 rear height motor C3075-3, circuit CPS37 (WH/BU), harness side and C3075-4, circuit CPS36 (YE/GY), harness side, while depressing the seat control switch rear height adjust up and down.

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

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to K7.

K7 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C355.

- Measure the resistance between passenger seat control switch C355-5, circuit CPS36 (YE/GY), harness side and passenger seat rear height motor C3075-4, circuit CPS36 (YE/GY), harness side.

Is the resistance less than 5 ohms?

Yes
GO to K8.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C355-7, circuit CPS37 (WH/BU), harness side and passenger seat rear height motor C3075-3, circuit CPS37 (WH/BU), harness side.

Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K9 CHECK FOR VOLTAGE TO THE FRONT HEIGHT MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3050.

- Disconnect: Passenger Seat Side Air Bag C3052.

- Disconnect: Passenger Seat Front Height Motor C3074.

- 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 front height motor C3074-3, circuit CPS35 (VT/GN), harness side and C3074-4, circuit CPS34 (GY/BU), while pushing the seat control switch rear height adjust up and down.

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

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to K10.

K10 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C355.

- Measure the resistance between passenger seat control switch C355-8, circuit CPS35 (VT/GN), harness side and passenger seat front height motor C3074-3, circuit CPS35 (VT/GN), harness side.

Is the resistance less than 5 ohms?

Yes
GO to K11.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3050.

CONNECT passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

K11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C355-1, circuit CPS34 (GY/BU), harness side, and passenger seat front height motor C3074-4, circuit CPS34 (GY/BU), harness side.