Pinpoint Test L: The Power Seat Does Not Operate Correctly - Passenger Seat
Seats
Pinpoint Tests
Pinpoint Test L: The Power Seat Does Not Operate Correctly - Passenger Seat
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 SBB10 (YE/RD) and ground on circuit GD151 (BK/GN). 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 L: THE POWER SEAT DOES NOT OPERATE CORRECTLY - PASSENGER SEAT
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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L1 CHECK HORIZONTAL DIRECTION MOTOR FOR CORRECT OPERATION
- Operate the passenger power seat forward and rearward.
- Will the seat move horizontally?
Yes
GO to L5.
No
GO to L2.
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L2 CHECK VOLTAGE TO THE PASSENGER SEAT HORIZONTAL MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3202.
- Disconnect: Passenger Seat Side Air Bag C3050.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- Measure the voltage between passenger seat motor C3015-6, circuit CPS38 (GN/BU), harness side and C3015-3, circuit CPS33 (WH), harness side, while pushing the passenger seat control switch forward and rearward.
- Is the voltage greater than -10 volts when the switch is pushed forward, greater than +10 volts when the switch is pushed rearward and 0 volt when the switch is in a rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
GO to L3.
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L3 CHECK CIRCUIT CPS38 (GN/BU) FOR AN OPEN AND SHORT TO GROUND
- 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 motor C3015-6, circuit CPS38 (GN/BU), harness side.
- passenger seat control switch C355-6, circuit CPS38 (GN/BU), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to L4.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L4 CHECK CIRCUIT CPS33 (WH) FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C355-3, circuit CPS33 (WH), harness side and passenger seat motor C3015-3, circuit CPS33 (WH), harness side.
- passenger seat control switch C355-3, circuit CPS33 (WH), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT passenger safety belt buckle and pretensioner C3202.
CONNECT passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L5 DETERMINE SEAT TILTING FAILURE
- Determine seat tilting failure.
- Can the seat be tilted forward or backward?
Yes
If only forward tilting operates, GO to L6.
If only rear tilting operates, GO to L9.
No
INSTALL a new passenger seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L6 CHECK VOLTAGE TO THE PASSENGER SEAT REAR HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3202.
- Disconnect: Passenger Seat Side Air Bag C3050.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- Measure the voltage between passenger seat motor C3015-1, circuit CPS37 (WH/BU), harness side and C3015-4, circuit CPS36 (YE/GY), harness side, while depressing the rear tilt switch up and down.
- Is the voltage greater than -10 volts when the rear tilt switch is pressed down, greater than +10 volts when the rear tilt switch is pressed up and 0 volt when the switch is in the rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
GO to L7.
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L7 CHECK CIRCUIT CPS36 (YE/GY) FOR AN OPEN AND SHORT TO GROUND
- 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 motor C3015-4, circuit CPS36 (YE/GY), harness side.
- passenger seat control switch C355-5, circuit CPS36 (YE/GY), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to L8.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L8 CHECK CIRCUIT CPS37 (WH/BU) FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C355-7, circuit CPS37 (WH/BU), harness side and passenger seat motor C3015-1, circuit CPS37 (WH/BU), harness side.
- passenger seat control switch C355-7, circuit CPS37 (WH/BU), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L9 CHECK THE VOLTAGE TO THE PASSENGER SEAT FRONT HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3202.
- Disconnect: Passenger Seat Side Air Bag C3050.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- Measure the voltage between passenger seat motor C3015-2, circuit CPS35 (VT/GN), harness side and C3015-5, circuit CPS34 (GY/BU), while pushing the rear tilting switch up and down.
- Is the voltage greater than +10 volts when the front tilt switch is pressed down, greater than -10 volts when the front tilt switch is pressed up and 0 volt when the switch is in the rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
GO to L10.
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L10 CHECK CIRCUIT CPS35 (VT/GN) FOR AN OPEN AND SHORT TO GROUND
- 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 motor C3015-2, circuit CPS35 (VT/GN), harness side.
- passenger seat control switch C355-8, circuit CPS35 (VT/GN), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to L11.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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L11 CHECK CIRCUIT CPS34 (GY/BU) FOR AN OPEN
- Measure the resistance between:
- passenger seat control switch C355-1, circuit CPS34 (GY/BU), harness side, and passenger seat motor C3015-5, circuit CPS34 (GY/BU), harness side.
- passenger seat control switch C355-1, circuit CPS34 (GY/BU), harness side and ground.
- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT the passenger safety belt buckle and pretensioner C3202.
CONNECT the passenger seat side air bag module C3050.
REPOWER the SRS. REFER to Restraint Systems.
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