Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically
Seats
Pinpoint Tests
Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically
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 SBB74 (YE/RD) and ground on circuit GD133 (BK). When pressed the seat control switch supplies battery voltage and ground to horizontal motor circuits CPS23 (GN/VT), 980 (YE/WH), CPS28 (GN) and 981 (RD/WH), front height motor circuits CPS24 (GY), 979 (RD/LB), CPS25 (WH/VT) and 990 (YE/LB) or rear height motor circuits CPS27 (BU/BN), 982 (YE/LG), CPS26 (YE/BU) and 983 (RD/LG).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track motor
PINPOINT TEST E: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY
NOTICE: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
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.
NOTE: During testing, circuit numbers and wire colors may change as they pass through connectors.
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E1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the seat control switch in the forward and rearward positions.
- Does the seat move horizontally?
Yes
GO to E5.
No
GO to E2.
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E2 CHECK VOLTAGE TO THE HORIZONTAL MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3338.
- Disconnect: Horizontal Motor C362.
- 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 voltage between horizontal motor C362-1, circuit 981 (RD/WH), harness side and C362-2, circuit 980 (YE/WH), harness side, while operating the seat control switch forward and rearward.
- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?
Yes
INSTALL a new seat track. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to E3.
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E3 CHECK HORIZONTAL MOTOR CIRCUIT CPS23 (GN/VT) AND 980 (YE/WH) FOR AN OPEN
- Disconnect: Seat Control Switch C360.
- Measure resistance between seat control switch C360-8, circuit CPS23 (GN/VT), harness side and horizontal motor C362-2, circuit 980 (YE/WH), harness side.
- Is resistance less than 5 ohms?
Yes
GO to E4.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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E4 CHECK HORIZONTAL MOTOR CIRCUIT CPS28 (GN) AND 981 (RD/WH) FOR AN OPEN
- Measure resistance between seat control switch C360-3, circuit CPS28 (GN), harness side and horizontal motor C362-1, circuit 981 (RD/WH), harness side.
- Is 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. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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E5 DETERMINE SEAT HEIGHT ADJUST FAILURE
- Operate the seat control switch in the front up/down and rear up/down positions and determine the seat height adjust failure.
- Does the seat front or rear height adjust up and down?
Yes
If only the front height adjust operates, GO to E6.
If only the rear height adjust operates, GO to E9.
No
INSTALL a new seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.
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E6 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3338.
- Disconnect: Rear Height Motor C363.
- 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 voltage between rear height motor C363-1, circuit 982 (YE/LG), harness side and C363-2, circuit 983 (RD/LG), harness side; while operating the seat control switch rear height adjust up and down.
- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?
Yes
INSTALL a new seat track. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to E7.
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E7 CHECK REAR HEIGHT MOTOR CIRCUIT CPS26 (YE/BU) AND 983 (RD/LG) FOR AN OPEN
- Disconnect: Seat Control Switch C360.
- Measure resistance between seat control switch C360-1, circuit CPS26 (YE/BU), harness side and rear height motor C363-2, circuit 983 (RD/LG), harness side.
- Is resistance less than 5 ohms?
Yes
GO to E8.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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E8 CHECK REAR HEIGHT MOTOR CIRCUIT CPS27 (BN/BU) AND 982 (YE/LG) FOR AN OPEN
- Measure resistance between seat control switch C360-6, circuit CPS27 (BN/BU), harness side and rear height motor C363-1, circuit 982 (YE/LG), harness side.
- Is 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. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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E9 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3338.
- Disconnect: Front Height Motor C382.
- 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 voltage between front height motor C382-1, circuit 990 (YE/LB), harness side and C382-2, circuit 979 (RD/LB), harness side; while operating the seat control switch front height adjust up and down.
- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?
Yes
INSTALL a new seat track. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to E10.
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E10 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS24 (GY) AND 979 (RD/LB) FOR AN OPEN
- Disconnect: Seat Control Switch C360.
- Measure resistance between seat control switch C360-7, circuit CPS24 (GY), harness side and front height motor C382-2, circuit 979 (RD/LB), harness side.
- Is resistance less than 5 ohms?
Yes
GO to E11.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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E11 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS25 (WH/VT) AND 990 (YE/LB) FOR AN OPEN
- Measure resistance between seat control switch C360-5, circuit CPS25 (WH/VT), harness side and front height motor C382-1, circuit 990 (YE/LB), harness side.
- Is 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. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3338. REPOWER the SRS. REFER to Air Bag Systems.
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