E1-E11
Seats
Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Memory
Normal Operation
The seat control switch supplies voltage and ground to the applicable Driver Seat Module (DSM) inputs. The DSM (Driver Seat Module) then supplies voltage and ground to the appropriate seat track motor or seat recliner motor to move the seat in the desired direction. There are 3 seat track motors that combine to move the seat horizontally (forward/backward) and vertically (front up/down and rear up/down). The seat recliner mechanism uses a single motor to pivot the seat backrest forward and backward.
The following pinpoint test diagnoses a power seat with memory that does not operate or does not operate correctly. If the seat does not operate using the memory SET switch or operates in one second intervals, GO to Pinpoint Test F. Pinpoint Test F: Memory Seat Does Not Operate Correctly - Operates In One Second Intervals/Memory Seat Recall Not functioning
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
- Power seat motor
- Seat track
- DSM (Driver Seat Module)
PINPOINT TEST E : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER, WITH MEMORY
NOTE:
If a seat equipped with a seat mounted side air bag is being repaired, the Supplemental Restraint System (SRS) must be depowered. Refer to Restraints and Safety Systems &/or Air Bag Systems.
NOTE:
The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS (Supplemental Restraint System) fault.
NOTE:
The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE:
If a new DSM (Driver Seat Module) has been installed, all seat soft stops must be reset. If a new seat track or recline motor has been installed, only reset the soft stops for that component being installed new. To reset the soft stops, refer to Principles of Operation Principles of Operation.
NOTE:
Verify good battery condition before diagnosing the memory seat system. Poor battery condition may interfere with memory seat operation, even if vehicle starting is possible.
E1 RETRIEVE THE DSM (Driver Seat Module) DTCs
- Enter the following diagnostic mode on the scan tool: Self Test- DSM (Driver Seat Module).
Are any DSM (Driver Seat Module) DTCs retrieved?
Yes
If DTCs B1663, B1664, B1665 and B1666 are all retrieved, GO to E2.
If DTC B1663, GO to E11.
If DTC B1664, GO to E14.
If DTC B1665, GO to E17.
If DTC B1666, GO to E20.
If DTC B1703, B1707, B1711, B1715, B1719, B1723, B1727 or B1731, GO to E8.
For any other DSM (Driver Seat Module) DTCs, REFER to the Driver Seat Module (DSM)
DTC Chart. Seats
No
GO to E4.
E2 CHECK FOR VOLTAGE TO THE DSM (Driver Seat Module)
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag Module C3051.
- Disconnect: DSM (Driver Seat Module) C341A.
- 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 DSM (Driver Seat Module) C341A-1, circuit CBX05 (VT/RD), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to E3.
No
VERIFY Battery Junction Box (BJB) fuse 74 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify possible causes of the circuit short [1][2]Diagrams By Number. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E3 CHECK THE DSM (Driver Seat Module) GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between DSM (Driver Seat Module) C341A-2, circuit GD906 (BK/GY), harness side and ground.
Is the resistance less than 5 ohms?
Yes
INSTALL a new DSM (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E4 MONITOR THE DSM (Driver Seat Module) PIDs AND CHECK FOR CORRECT SEAT CONTROL SWITCH INPUTS
- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- Driver Power Seat Front Up/Down Switch (SFNT_SW)
- Driver Power Seat Forward/Backward Switch (SFWD_SW)
- Driver Power Seat Recline Switch Status (SRCL_SW)
- Driver Power Seat Rear Up/Down Switch (SREARSW)
- Operate the seat control switch in all positions while monitoring the DSM (Driver Seat Module) driver seat control switch input status PIDs.
Do the PID values agree with the switch positions?
Yes
GO to E10.
No
If no response from any PID, GO to E5. Otherwise, GO to E7.
E5 CHECK VOLTAGE TO THE SEAT CONTROL SWITCH
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag Module C3051.
- Disconnect: Seat Control Switch C369.
- 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 seat control switch C369-5, circuit CBX04 (WH/RD), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to E6.
No
VERIFY Body Control Module (BCM) fuse 5 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify possible causes of the circuit short [1][2]Diagrams By Number.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E6 CHECK THE SEAT CONTROL SWITCH GROUND FOR AN OPEN
- Measure the resistance between seat control switch C369-3, circuit GD904 (BK/BU), harness side and ground.
Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch . CLEAR the DTCs. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E7 CHECK THE AFFECTED CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND DSM (Driver Seat Module) FOR AN OPEN
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag Module C3051.
- Disconnect: DSM (Driver Seat Module) C341B.
- Disconnect: Seat Control Switch C369.
- Measure the resistance between seat control switch C369, harness side and DSM (Driver Seat Module) C341B, harness side using the following chart:
Seat Control Switch Connector Circuit DSM (Driver Seat Module) Connector C369-1 CPS27 (BU/BN) C341B-17 C369-2 CPS25 (WH/VT) C341B-18 C369-4 CPS23 (GN/VT) C341B-16 C369-6 CPS24 (GY) C341B-6 C369-8 CPS30 (VT/BN) C341B-7 C369-9 CPS28 (GN) C341B-15 C369-11 CPS29 (WH/BN) C341B-19 C369-12 CPS26 (YE/BU) C341B-5
Are the resistances less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch . CLEAR the DTCs. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E8 CHECK THE SEAT CONTROL SWITCH
- Remove the seat control switch. Refer to Seat Control Switch .
- Check the seat control switch.
Is the seat control switch OK?
Yes
GO to E9.
No
INSTALL a new seat control switch. REFER to Seat Control Switch . CLEAR the DTCs. TEST the system for normal operation.
E9 CHECK THE AFFECTED CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND DSM (Driver Seat Module) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag Module C3051.
- Disconnect: DSM (Driver Seat Module) C341B.
- 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.
- Ignition ON.
- Measure the voltage between seat control switch C369, harness side and ground using the following chart:
Seat Control Switch Connector Circuit C369-1 CPS27 (BU/BN) C369-2 CPS25 (WH/VT) C369-4 CPS23 (GN/VT) C369-6 CPS24 (GY) C369-8 CPS30 (VT/BN) C369-9 CPS28 (GN) C369-11 CPS29 (WH/BN) C369-12 CPS26 (YE/BU)
Is any voltage present on any circuit?
Yes
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
INSTALL a new DSM (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
E10 CHECK THE DSM (Driver Seat Module) FOR CORRECT OUTPUTS
- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- Front Motor Up (FRONT_UP)
- Front Motor Down (FRONT_DWN)
- Rear Motor Up (REAR_UP)
- Rear Motor Down (REAR_DWN)
- Horizontal Motor Forward (HORZ_FWD)
- Horizontal Motor Backward (HORZ_BWD)
- Recline Motor Forward (RECL_FWD)
- Recline Motor Backward (RECL_BWD)
- Toggle the DSM (Driver Seat Module) active commands ON and OFF while monitoring the seat movement.
Does the driver seat operate correctly using the active commands?
Yes
The fault is intermittent. CHECK the electrical connectors for corrosion, poor pin contact or pushed out pins, particularly the pins and terminals of electrical connectors that were disconnected. Do not install any new components at this time. Components should only be installed when directed to do so in the pinpoint test. REPAIR any intermittent wiring, terminal or connector concerns found. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
If no front height seat movement, GO to E11.
If no rear height seat movement, GO to E14.
If no horizontal seat movement, GO to E17.
If no seat recliner movement, GO to E20.
E11 CHECK THE FRONT HEIGHT MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag Module C3051.
- 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.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- Front Motor Up (FRONT_UP)
- Front Motor Down (FRONT_DWN)
- Measure the voltage between front height motor C382-1, circuit CPS02 (GY/YE) and C382-2, circuit CPS03 (VT/GY), harness side while using the scan tool to operate DSM (Driver Seat Module) active commands front motor up and front motor down, ON and OFF.
Is the voltage greater than 10 volts when commanded ON in both directions and no voltage present when commanded OFF?
Yes
INSTALL a new seat track assembly. REFER to Seat Track . CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E12.