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Pinpoint Test AZ : DTC B272C

NOTE: When taking measurements at Dual Climate Controlled Seat Module(DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.
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.

  1. AZ1 CHECK FOR DCSM DTCs

    • Enter the following diagnostic mode on the scan tool: Self Test -- DCSM.

    Was DTC B2729 or B2730 retrieved? 

    Yes  For DTC B2729, GO to Pinpoint Test AW . For DTC B2730, GO to Pinpoint Test BD .
    No  GO to  AZ2.

  2. AZ2 MONITOR THE TED TEMPERATURE PIDs

    • Enter the following diagnostic mode on the scan tool: DataLogger -- DCSM -- PIDs.

      • Passenger Cushion Thermal Electric Device (TED) Temperature (PCSHTMP)
      • Passenger Back TED Temperature (PBKTMP)
      • Seat cushion thermal electric device temperature (CSHTEMP)
      • Seat back thermal electric device temperature (BK_TEMP)

    • NOTE: Make sure the temperature of the climate controlled seats has stabilized before monitoring the PIDs. Not allowing stabilization can cause incorrect readings and lead to incorrect identification of components that are not faulty.

      Monitor TED temperature PIDs with the climate controlled seats OFF. Compare the PID values of the driver seat to those of the front passenger seat, this can help identify if there is a concern with the driver seat cushion or backrest PID value readings.

    Are both driver seat TED temperature PIDs within 10 deg.C (18 deg.F) of the ambient temperature? 

    Yes  GO to  AZ3.
    No  If the driver seat cushion PID varies 10 deg.C (18 deg.F) or more from ambient temperature, GO to  AZ16. If the driver seat backrest PID varies 10 deg.C (18 deg.F) or more from ambient temperature, GO to  AZ32.

  3. AZ3 CONFIRM THE FAULT IS IN THE SEAT CUSHION OR THE BACKREST

    • Ignition OFF.

    • Ignition ON.

    • NOTE: A crushed seat cushion foam pad or a crushed climate controlled seat manifold may be the cause of the fault. It may be necessary to sit on the seat or place something of reasonable size and weight on the seat to recreate the fault.

      After cycling the ignition and with the engine running, set the driver seat to high heat (3 indicators illuminated). Allow the seat to heat for at least 15 minutes while monitoring the TED temperature PIDs of the driver seat.

    Do the driver seat cushion TED and backrest TED PIDs vary more than 60 deg.C (108 deg.F) from each other? 

    Yes  If the driver seat cushion PID is 60 deg.C (108 deg.F) hotter than the backrest PID, GO to  AZ5. If the driver seat backrest PID is 60 deg.C (108 deg.F) hotter than the cushion PID, GO to  AZ20.
    No  GO to  AZ4.

  4. AZ4 CHECK THE TEDs COOLING PERFORMANCE

    Did the TEDs pass the component test? 

    Yes  The DTC may have been set by extreme cabin temperatures or excessive sunload on the seat causing the system to enter recovery mode. Occupant size and weight characteristics can also be a factor. CLEAR the DTCs. REPEAT the self-test. If a concern cannot be found or duplicated, RETURN the vehicle to the customer.
    No  CHECK the affected seat cushion or backrest for correct installation of the climate controlled seat components (TED, manifold, plenum, air ducts and foam pad). CHECK for airflow restrictions (TED inlets and outlets, TED -to-manifold or plenum connections, filters and ducts) and REPAIR as needed. CHECK for an intermittent wiring fault. REPAIR as needed. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

  5. AZ5 CHECK FOR CORRECT TED INSTALLATION AND FOR CRUSHED FOAM

    • Ignition OFF.

    • Inspect the seat cushion for the following:

      • Is the cushion blower obstructed?

      • Is the blower filter restricted or plugged?

      • Is the TED correctly installed?

      • Is the seat cushion foam pad crushed or restricted?

      • Is the climate controlled seat manifold crushed or restricted?

    Is the TED correctly installed and the foam pad and manifold OK? 

    Yes  GO to  AZ6.
    No  CORRECTLY install the cushion TED or INSTALL a new seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. DISCONNECT the battery ground cable. REPOWER the SRS. REFER to Supplemental Restraint System .

  6. AZ6 CHECK THE BACKREST TED GROUND CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Position the driver seat in the vehicle and connect the seat-to-floor connectors.

    • Disconnect: Driver Seat Side Air Bag C367.

    • Disconnect: Passenger Seat Side Air Bag C337.

    • Disconnect: DCSM C3265A.

    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag 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, Mounting and Cables .

    • Ignition ON.

    • Measure voltage between DCSM C3265A-K, circuit RHS01 (WH/VT), harness side and ground.

    Is any voltage present? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ7.

  7. AZ7 CHECK THE BACKREST TED FEED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure the resistance between DCSM C3265A-J, circuit CHS01 (GY/VT), harness side and ground.

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AZ8.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  8. AZ8 CHECK THE RESISTANCE OF THE BACKREST TED AND WIRING

    • Measure the resistance between DCSM C3265A-J, circuit CHS01 (GY/VT), harness side and DCSM C3265A-K, circuit RHS01 (WH/VT), harness side.

    Is the resistance between 0.9 and 10 ohms? 

    Yes  GO to  AZ10.
    No  GO to  AZ9.

  9. AZ9 CHECK THE RESISTANCE OF THE BACKREST TED

    • Disconnect: Backrest TED C3034.

    • Measure the resistance between backrest TED C3034 pin 1 and pin 3, component side.

    Is the resistance between 0.9 and 10 ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  10. AZ10 CHECK THE BLOWER MOTOR FEED AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect: DCSM C3265C.

    • Ignition ON.

    • Measure voltage between:

      • DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and ground.

      • DCSM C3265C-11, circuit VHS18 (BN/GN), harness side and ground.

    Is voltage present on either circuit? 

    Yes  GO to  AZ11.
    No  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  11. AZ11 CHECK THE BLOWER MOTOR FEED AND SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure the resistance between:

      • DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and ground.

      • DCSM C3265C-11, circuit VHS18 (BN/GN), harness side and ground.

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AZ12.
    No  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  12. AZ12 CHECK THE BLOWER MOTOR AND WIRING

    • NOTE: The ohmmeter must be connected with the positive lead to DCSM C3265C-16, circuit CHS03 (GN/BN) and the negative lead to DCSM C3265C-15, circuit RHS03 (GY/OG) when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and DCSM C3265C-15, circuit RHS03 (GY/OG), harness side.

    Is the resistance between 4, 000 and 10, 000 ohms? 

    Yes  GO to  AZ14.
    No  GO to  AZ13.

  13. AZ13 CHECK THE BLOWER MOTOR RESISTANCE

    • Disconnect: Cushion TED C3035.

    • NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between cushion TED C3035 pin 2 and pin 4, component side.

    Is the resistance between 4, 000 and 10, 000 ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  14. AZ14 CHECK THE BLOWER MOTOR SPEED CONTROL AND CIRCUIT RESISTANCE

    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-11, circuit VHS18 (BN/GN), harness side and the negative lead to C3265C-15, circuit RHS03 (GY/OG), harness side when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-11, circuit VHS18 (BN/GN) harness side and DCSM C3265C-15, circuit RHS03 (GY/OG), harness side.

    Is the resistance between 240K and 4M ohms? 

    Yes  GO to  AZ16.
    No  GO to  AZ15.

  15. AZ15 CHECK THE BLOWER MOTOR SPEED CONTROL RESISTANCE

    • Disconnect: Cushion TED C3035.

    • NOTE: The ohmmeter must be connected with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between cushion TED C3035 pin 7 and pin 4, component side.

    Is the resistance between 240K and 4M ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  16. AZ16 CHECK THE THERMISTOR FEED CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect: Driver Seat Side Air Bag C367.

    • Disconnect: Passenger Seat Side Air Bag C337.

    • Disconnect: DCSM C3265B.

    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag 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, Mounting and Cables .

    • Ignition ON.

    • Measure voltage between DCSM C3265B-7, circuit VHS26 (VT), harness side and ground.

    Is any voltage present? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ17.

  17. AZ17 CHECK THE THERMISTOR FEED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure the resistance between DCSM C3265B-7, circuit VHS26 (VT), harness side and ground.

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AZ18.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  18. AZ18 CHECK THE TED THERMISTOR AND WIRING RESISTANCE AT THE DCSM

    • Measure the resistance between DCSM C3265B-7, circuit VHS26 (VT), harness side and DCSM C3265B-8, circuit RHS05 (YE/VT), harness side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10 deg.C (32-50 deg.F) 2, 782-1, 663 ohms
      10-20 deg.C (50-68 deg.F) 1, 837-1, 140 ohms
      20-30 deg.C (68-86 deg.F) 1, 260-806 ohms
      30-40 deg.C (86-104 deg.F) 893-570 ohms
      40-50 deg.C (104-122 deg.F) 630-428 ohms

    Is the resistance within the limits indicated? 

    Yes  INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM)  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ19.

  19. AZ19 CHECK THE TED THERMISTOR RESISTANCE

    • Disconnect: Cushion TED C3035.

    • Measure the resistance between cushion TED pin 5 and pin 8, component side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10 deg.C (32-50 deg.F) 2, 782-1, 663 ohms
      10-20 deg.C (50-68 deg.F) 1, 837-1, 140 ohms
      20-30 deg.C (68-86 deg.F) 1, 260-806 ohms
      30-40 deg.C (86-104 deg.F) 893-570 ohms
      40-50 deg.C (104-122 deg.F) 630-428 ohms

    Is the resistance within the limits indicated? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  20. AZ20 CHECK FOR CORRECT TED INSTALLATION AND FOR CRUSHED FOAM

    • Ignition OFF.

    • Inspect the seat backrest for the following:

      • Is the backrest blower obstructed?

      • Is the blower filter restricted or plugged?

      • Is the TED correctly installed?

      • Is the seat backrest foam pad crushed or restricted?

      • Is the climate controlled seat manifold crushed or restricted?

    Is the TED correctly installed and the foam pad and manifold OK? 

    Yes  GO to  AZ21.
    No  CORRECTLY install the backrest TED or INSTALL a new seat backrest foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. REPOWER the SRS. REFER to Supplemental Restraint System .

  21. AZ21 CHECK THE CUSHION TED GROUND CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Position the driver seat in the vehicle and connect the seat-to-floor connectors.

    • Disconnect: Driver Seat Side Air Bag C367.

    • Disconnect: Passenger Seat Side Air Bag C337.

    • Disconnect: DCSM C3265A.

    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag 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, Mounting and Cables .

    • Ignition ON.

    • Measure voltage between DCSM C3265A-H, circuit RHS02 (BU/OG), harness side and ground.

    Is any voltage present? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ22.

  22. AZ22 CHECK THE CUSHION TED FEED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure the resistance between DCSM C3265A-G, circuit CHS02 (YE/BU), harness side and ground.

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AZ23.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  23. AZ23 CHECK THE RESISTANCE OF THE CUSHION TED AND WIRING

    • Measure the resistance between DCSM C3265A-G circuit CHS02 (YE/BU), harness side and DCSM C3265A-H, circuit RHS02 (BU/OG), harness side.

    Is the resistance between 0.9 and 10 ohms? 

    Yes  GO to  AZ25.
    No  GO to  AZ24.

  24. AZ24 CHECK THE CUSHION TED RESISTANCE

    • Disconnect: Cushion TED C3035.

    • Measure the resistance between cushion TED C3035 pin 1 and pin 3, component side.

    Is the resistance between 0.9 and 10 ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  25. AZ25 CHECK THE BLOWER MOTOR FEED AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect: DCSM C3265C.

    • Ignition ON.

    • Measure voltage between:

      • DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and ground.

      • DCSM C3265C-12, circuit CHS09 (GY), harness side and ground.

    Is voltage present on either circuit? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ26.

  26. AZ26 CHECK THE BLOWER MOTOR AND SPEED CONTROL FEED CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure the resistance between:

      • DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and ground.

      • DCSM C3265C-12, circuit CHS09 (GY), harness side and ground.

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AZ27.
    No  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  27. AZ27 CHECK THE BLOWER MOTOR AND WIRING RESISTANCE

    • NOTE: The ohmmeter must be connected with the positive lead to DCSM C3265C-16, circuit CHS03 (GN/BN) and the negative lead to DCSM C3265C-15, circuit RHS03 (GY/OG) when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-16, circuit CHS03 (GN/BN), harness side and DCSM C3265C-15, circuit RHS03 (GY/OG), harness side.

    Is the resistance between 4, 000 and 10, 000 ohms? 

    Yes  GO to  AZ29.
    No  GO to  AZ28.

  28. AZ28 CHECK THE BLOWER MOTOR RESISTANCE

    • Disconnect: Backrest TED C3034.

    • NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between backrest TED C3034 pin 2 and pin 4, component side.

    Is the resistance between 4, 000 and 10, 000 ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  29. AZ29 CHECK THE BLOWER MOTOR SPEED CONTROL AND CIRCUIT RESISTANCE

    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-12, circuit CHS09 (GY), harness side and the negative lead to C3265C-15, circuit RHS03 (GY/OG), harness side when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-12, circuit CHS09 (GY) harness side and DCSM C3265C-15, circuit RHS03 (GY/OG), harness side.

    Is the resistance between 240K and 4M ohms? 

    Yes  GO to  AZ31.
    No  GO to  AZ30.

  30. AZ30 CHECK THE BLOWER MOTOR SPEED CONTROL RESISTANCE

    • Disconnect: Backrest TED C3034.

    • NOTE: The ohmmeter must be connected with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between backrest TED C3034 pin 7 and pin 4, component side.

    Is the resistance between 240K and 4M ohms? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  31. AZ31 CHECK THE THERMISTOR FEED CIRCUIT FOR A SHORT TO VOLTAGE

    • Disconnect: DCSM C3265B.

    • Ignition ON.

    • Measure voltage between DCSM C3265B-9, circuit CHS14 (GN), harness side and ground.

    Is any voltage present? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ32.

  32. AZ32 CHECK THE THERMISTOR FEED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect: Driver Seat Side Air Bag C367.

    • Disconnect: Passenger Seat Side Air Bag C337.

    • Disconnect: DCSM C3265B.

    • Measure the resistance between DCSM C3265B-9, circuit CHS14 (GN), harness side and ground.

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AZ33.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .

  33. AZ33 CHECK THE TED THERMISTOR AND WIRING RESISTANCE

    • Measure the resistance between DCSM C3265B-9, circuit CHS14 (GN), harness side and DCSM C3265B-10, circuit CHS29 (WH/BU), harness side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10 deg.C (32-50 deg.F) 2, 782-1, 663 ohms
      10-20 deg.C (50-68 deg.F) 1, 837-1, 140 ohms
      20-30 deg.C (68-86 deg.F) 1, 260-806 ohms
      30-40 deg.C (86-104 deg.F) 893-570 ohms
      40-50 deg.C (104-122 deg.F) 630-428 ohms

    Is the resistance within the limits indicated? 

    Yes  INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM)  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AZ34.

  34. AZ34 CHECK THE TED THERMISTOR RESISTANCE

    • Disconnect: Backrest TED C3034.

    • Measure the resistance between backrest TED pin 5 and pin 8, component side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10 deg.C (32-50 deg.F) 2, 782-1, 663 ohms
      10-20 deg.C (50-68 deg.F) 1, 837-1, 140 ohms
      20-30 deg.C (68-86 deg.F) 1, 260-806 ohms
      30-40 deg.C (86-104 deg.F) 893-570 ohms
      40-50 deg.C (104-122 deg.F) 630-428 ohms

    Is the resistance within the limits indicated? 

    Yes  REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device  in this information. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337. CONNECT driver seat side air bag C367. REPOWER the SRS. REFER to Supplemental Restraint System .
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