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Pinpoint Test

NOTE: When taking measurements at 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 DTCs  and system failure. Touching the tip of these connector pins is recommended instead.
  1. CHECK THE DCSM FOR ON-DEMAND DTCs 
    1. Start the vehicle and set the driver seat to HIGH heat.
    2. Using a scan tool, perform DCSM self-test.

    Was DTC B2729 retrieved on-demand during the self-test? 

    1. Yes: GO to 2  .
    2. No: GO to  5  .
  2. CHECK THE DRIVER SEAT CUSHION TED THERMISTOR CIRCUITS FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Depower the SRS:

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITH INTELLIGENT ACCESS (IA) , or

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITHOUT INTELLIGENT ACCESS (IA) .

    3. Disconnect: Driver Seat Side Air Bag C3051 and Passenger Seat Side Air Bag C339.
    4. Disconnect: DCSM C3265B.
    5. Disconnect: Driver Seat Cushion TED C3035.
    6. 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 DISCONNECT .

    7. Measure:
      DCSM Ground
      G08039514
      G08039515
      C3265B Ground
      Pin Circuit Measurement / Action Pin Circuit
      7 VHS26 (VT)
      G08039516
      		 - Ground
      8 RHS05 (YE/VT)
      G08039517
      		 - Ground

    Are the resistances greater than 10, 000 ohms? 

    1. Yes: GO to 3  .
    2. No: REPAIR the circuit(s). GO to  22  .
  3. CHECK THE DRIVER SEAT CUSHION TED THERMISTOR AND WIRING
    1. Connect: Driver Seat Cushion TED C3035.
    2. Measure:
      DCSM DCSM
      G08039518
      G08039519
      C3265B C3265B
      Pin Circuit Measurement / Action Pin Circuit
      7 VHS26 (VT)
      G08039520
      		 8 RHS05 (YE/VT)
      Ambient Temperature Resistance
      0 C (32 F) to 10 C (50 F) 2, 782 to 1, 663 ohms
      10 C (50 F) to 20 C (68 F) 1, 837 to 1, 140 ohms
      20 C (68 F) to 30 C (86 F) 1, 250 to 806 ohms
      30 C (86 F) to 40 C (103.9 F) 893 to 570 ohms
      40 C (103.9 F) to 50 C (121.9 F) 630 to 428 ohms

    Is the resistance within the limits indicated? 

    1. Yes: GO to  18  .
    2. No: GO to 4  .
  4. CHECK THE DRIVER SEAT CUSHION TED THERMISTOR
    1. Disconnect: Driver Seat Cushion TED C3035.
    2. Measure:
      Driver Cushion TED Driver Cushion TED
      G08039521
      G08039522
      C3035 Component Side C3035 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      5 -
      G08039523
      		 8 -
      Ambient Temperature Resistance
      0 C (32 F) to 10 C (50 F) 2, 782 to 1, 663 ohms
      10 C (50 F) to 20 C (68 F) 1, 837 to 1, 140 ohms
      20 C (68 F) to 30 C (86 F) 1, 250 to 806 ohms
      30 C (86 F) to 40 C (103.9 F) 893 to 570 ohms
      40 C (103.9 F) to 50 C (121.9 F) 630 to 428 ohms

    Is the resistance within the limits indicated? 

    1. Yes: REPAIR circuit VHS26 (VT) or RHS05 (YE/VT) (YE/GN) for an open or high resistance. GO to  22.
    2. No: INSTALL a new driver seat cushion TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  5. CONFIRM THE FAULT WHILE MONITORING THE DCSM SEAT BACK THERMAL ELECTRIC DEVICE TEMPERATURE (BK_TEMP) AND SEAT CUSHION THERMAL ELECTRIC DEVICE TEMPERATURE (CSHTEMP) PIDs 
    1. Set the driver seat to OFF.
    2. Using a scan tool, clear DCSM DTCs  .
    3. Using a scan tool, view DCSM PIDs  .
      • Seat Cushion TED Temperature (CSHTEMP)
      • Seat Back TED Temperature (BK_TEMP)
    4. NOTE: A crushed seat cushion foam pad or a crushed climate controlled seat manifold may be the cause of the fault making it necessary to occupy the seat to recreate and identify the fault.

      Attempt to recreate the fault. Start the vehicle and set the driver seat to HIGH heat for at least 15 minutes while occupying the seat.

    Do the PIDs increase incrementally (gradually) and stay within 15°C (27°F) of each other? 

    1. Yes: Fault not present at this time. Fault may have been set due to a past failure, incorrect use of the climate controlled seat system by repeated switching between heat and cool modes or due to excessive passenger compartment temperature. CLEAR the DTCs  . REPEAT the self-test.
    2. No: If the CSHTEMP PID increases incrementally and is greater than 15°C (27°F) of the BK_TEMP PID, GO to 6  .

      If the CSHTEMP PID increases quickly (temperature "jumps" and does not increase incrementally) and is greater than 15°C (27°F) of the BK_TEMP PID, GO to  16  .

  6. COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS
    1. With the engine running, set both front seats to HIGH cool.
    2. Note the airflow exhausting from the driver seat cushion TED and compare it to the airflow exhausting from the passenger seat cushion TED.
    3. Carry out a wiggle test of the wire harnesses between the DCSM and the driver seat cushion TED while monitoring blower operation of the TED. The blower should operate consistently and not change speeds

    Is the airflow exhausting from the driver seat cushion TED comparable to the airflow exhausting from the passenger seat cushion TED with no change in operation when carrying out the wiggle test? 

    1. Yes: GO to 7  .
    2. No: If the airflow exhausting from the driver seat cushion TED is not comparable to the airflow exhausting from the passenger seat cushion TED, GO to  8  .

      If the driver seat cushion TED blower operation changed while carrying out the wiggle test, IDENTIFY and REPAIR the wiring fault. CLEAR the DTCs  . REPEAT the self-test.

  7. COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS WHILE OCCUPIED
    1. Note the airflow exhausting from the driver seat cushion TED with the driver seat occupied and compare it to the airflow exhausting from the passenger seat cushion TED with the passenger seat occupied.

    Is the airflow exhausting from the driver seat cushion TED comparable to the airflow exhausting from the passenger seat cushion TED? 

    1. Yes: GO to  16  .
    2. No: INSTALL a new driver seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs  . REPEAT the self-test.
  8. CHECK THE DRIVER SEAT CUSHION BLOWER FOR AN OBSTRUCTION OR RESTRIC FILTER
    1. Ignition OFF.
    2. Inspect the blower of the driver seat cushion TED assembly for an obstruction or for a restricted filter.

    Is the blower obstructed or the filter restricted? 

    1. Yes: REMOVE the obstruction or INSTALL a new filter. CLEAR the DTCs  . REPEAT the self-test.
    2. No: GO to 9  .
  9. CHECK THE DRIVER SEAT CUSHION BLOWER SPEED CONTROL CIRCUIT FOR AN OPEN
    1. Depower the SRS:

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITH INTELLIGENT ACCESS (IA) , or

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITHOUT INTELLIGENT ACCESS (IA) .

    2. Disconnect: Driver Seat Side Air Bag C3051 and Passenger Seat Side Air Bag C339.
    3. Disconnect: DCSM C3265C.
    4. Disconnect: Driver Seat Cushion TED C3035.
    5. 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 DISCONNECT .

    6. Measure:
      DCSM Driver Seat Cushion TED
      G08039524
      G08039525
      C3265C C3035
      Pin Circuit Measurement / Action Pin Circuit
      11 VHS18 (BN/GN)
      G08039526
      		 7 VHS18 (BN/GN)

    Is the resistance less than 3 ohms? 

    1. Yes: GO to 10  .
    2. No: REPAIR the circuit. GO to  22  .
  10. CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition ON.
    2. Measure:
      DCSM Ground
      G08039527
      G08039528
      C3265C Ground
      Pin Circuit Measurement / Action Pin Circuit
      15 RHS03 (GY/OG)
      G08039529
      		 - Ground

    Is any voltage present? 

    1. Yes: REPAIR the circuit. GO to  22  .
    2. No: GO to 11  .
  11. CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Measure:
      DCSM Ground
      G08039530
      G08039531
      C3265C Ground
      Pin Circuit Measurement / Action Pin Circuit
      16 CHS03 (GN/BN)
      G08039532
      		 - Ground

    Is the resistance greater than 10, 000 ohms? 

    1. Yes: GO to 12  .
    2. No: REPAIR the circuit. GO to  22  .
  12. CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUITS FOR AN OPEN
    1. Measure:
      DCSM Driver Seat Cushion TED
      G08039533
      G08039534
      C3265C C3035
      Pin Circuit Measurement / Action Pin Circuit
      15 RHS03 (GY/OG)
      G08039535
      		 4 RHS03 (GY/OG)
      16 CHS03 (GN/BN)
      G08039536
      		 2 CHS03 (GN/BN)

    Are the resistances less than 3 ohms? 

    1. Yes: GO to 13  .
    2. No: REPAIR the circuit(s). GO to  22  .
  13. CHECK THE DRIVER SEAT CUSHION BLOWER RESISTANCE
    1. NOTE: Connect the ohmmeter with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not damaged.

      Measure:

      Driver Seat Cushion TED Driver Seat Cushion TED
      G08039537
      G08039538
      C3035 Component Side C3035 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      2 -
      G08039539
      		 4 -

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

    1. Yes: GO to 14  .
    2. No: INSTALL a new driver seat cushion TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  14. CHECK THE DRIVER SEAT CUSHION BLOWER SPEED CONTROL RESISTANCE
    1. NOTE: Connect the ohmmeter with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not damaged.

      Measure:

      Driver Seat Cushion TED Driver Seat Cushion TED
      G08039540
      G08039541
      C3035 Component Side C3035 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      7 -
      G08039542
      		 4 -

    Is the resistance between 240K ohms and 420K ohms? 

    1. Yes: GO to 15  .
    2. No: INSTALL a new driver seat cushion TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  15. CHECK THE DRIVER SEAT CUSHION TED INSTALLATION AND FOR CRUSHED SEAT CUSHION
    1. Ignition OFF.
    2. Remove the seat. REFER to Seat .
    3. Remove the seat cushion cover. REFER to Seat Cushion Cover .
    4. Inspect the driver seat cushion.
      • Is the driver seat cushion TED correctly installed?
      • Is the driver seat cushion seat cushion foam pad crushed or restricted?
      • Is the driver seat cushion climate controlled seat manifold crushed or restricted?

    Is the TED correctly installed and are the foam pad and manifold free of damage? 

    1. Yes: INSTALL the driver seat cushion cover and seat and GO to  18  .
    2. No: CORRECTLY install the driver seat cushion TED or INSTALL a new driver seat cushion foam pad and/or climate controlled seat manifold. CONNECT the battery ground cable. GO to  22  .
  16. CHECK THE DRIVER SEAT CUSHION TED THERMISTOR AND WIRING
    1. Ignition OFF.
    2. Depower the SRS:

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITH INTELLIGENT ACCESS (IA) , or

      REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING - WITHOUT INTELLIGENT ACCESS (IA) .

    3. Disconnect: Driver Seat Side Air Bag C3051 and Passenger Seat Side Air Bag C339.
    4. Disconnect: DCSM C3265B.
    5. 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 DISCONNECT .

    6. Measure:
      DCSM DCSM
      G08039543
      G08039544
      C3265B C3265B
      Pin Circuit Measurement / Action Pin Circuit
      7 VHS26 (VT)
      G08039545
      		 8 RHS05 (YE/VT)
      Ambient Temperature Resistance
      0 C (32 F) to 10 C (50 F) 2, 782 to 1, 663 ohms
      10 C (50 F) to 20 C (68 F) 1, 837 to 1, 140 ohms
      20 C (68 F) to 30 C (86 F) 1, 250 to 806 ohms
      30 C (86 F) to 40 C (103.9 F) 893 to 570 ohms
      40 C (103.9 F) to 50 C (121.9 F) 630 to 428 ohms

    Is the resistance within the limits indicated? 

    1. Yes: GO to  18  .
    2. No: GO to 17  .
  17. CHECK THE DRIVER SEAT CUSHION TED THERMISTOR
    1. Measure:
      Driver Cushion TED Driver Cushion TED
      G08039546
      G08039547
      C3035 Component Side C3035 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      5 -
      G08039548
      		 8 -
      Ambient Temperature Resistance
      0 C (32 F) to 10 C (50 F) 2, 782 to 1, 663 ohms
      10 C (50 F) to 20 C (68 F) 1, 837 to 1, 140 ohms
      20 C (68 F) to 30 C (86 F) 1, 250 to 806 ohms
      30 C (86 F) to 40 C (103.9 F) 893 to 570 ohms
      40 C (103.9 F) to 50 C (121.9 F) 630 to 428 ohms

    Is the resistance within the limits indicated? 

    1. Yes: REPAIR circuit VHS26 (VT) or RHS05 (YE/VT) for an open or high resistance. GO to  22.
    2. No: INSTALL a new TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  18. CHECK THE DRIVER SEAT CUSHION TED HEATING/COOLING CIRCUITRY CURRENT DRAW
    1. Connect: All DCSM, TED and body harness-to-seat harness connectors.
    2. NOTE: It may be necessary to open the seat wire harness conduit to allow placing the inductive current probe around the circuit as described in the following step. Care must be taken when opening up the wire harness so as not to damage any wiring or connectors. Do not damage any wiring or induce stress on any wiring or connectors. Close up the wire harness once repairs to the seat are complete.
    3. NOTE: Use a commercially available inductive current probe (such as Electronic Specialties Current Probe/Multimeter 685 or a Fluke I410 [used with a digital multimeter]) or the low current probe from the Vehicle Measurement Module available for use with IDS. If these are unavailable, the inductive current probe feature from a battery tester may be substituted.
    4. Place an inductive current probe around circuit CHS02 (YE/BU) near DCSM C3305A-G and monitor the current draw.
    5. Start the vehicle and set the driver seat to HIGH heat.

    Is the current draw less than 11 amps? 

    1. Yes: GO to 19  .
    2. No: INSTALL a new driver seat cushion TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  19. CHECK RESISTANCE OF THE DRIVER SEAT CUSHION TED AND WIRING
    1. Ignition OFF.
    2. Disconnect: DCSM C3265A.
    3. Measure:
      DCSM DCSM
      G08039549
      G08039550
      C3265A C3265A
      Pin Circuit Measurement / Action Pin Circuit
      G CHS02 (YE/BU)
      G08039551
      		 H RHS02 (BU/OG)

    Is the resistance between 0.9 and 10 ohms? 

    1. Yes: GO to  21  .
    2. No: GO to 20  .
  20. CHECK THE RESISTANCE OF THE DRIVER SEAT CUSHION TED
    1. Disconnect: Driver Seat Cushion TED C3035.
    2. Measure:
      Driver Cushion TED Driver Cushion TED
      G08039552
      G08039553
      C3035 Component Side C3035 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      1 -
      G08039554
      		 3 -

    Is the resistance between 0.9 and 10 ohms? 

    1. Yes: REPAIR circuit CHS02 (YE/BU) or RHS02 (BU/OG) for an open or high resistance. GO to  22.
    2. No: INSTALL a new driver seat cushion TED. REFER to Seat Cushion Thermo-Electric Device (TED) . GO to  22.
  21. CHECK FOR CORRECT DCSM OPERATION
    1. Inspect the DCSM and driver seat cushion TED harness and component side connectors and the body harness-to-seat harness connectors for:
    2. corrosion
    3. damaged pins
    4. pushed-out pins
    5. Connect: All DCSM, TED and Body Harness-to-Seat Harness Connectors.
    6. Make sure the connectors are seated correctly.
    7. Start the engine.
    8. Set the driver seat to OFF.
    9. Enter the following diagnostic mode on the scan tool: Clear DTCs  - DCSM.
    10. Attempt to recreate the fault. With the engine still running set the driver seat to HIGH heat for at least 15 minutes.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM) . GO to 22  .
    2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. GO to 22  .
  22. CHECK FOR SRS DTCs 
    1. WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

      Ignition OFF.

    2. Connect: Driver Seat Side Air Bag C3051.
    3. Connect: Passenger Seat Side Air Bag C339.
    4. Connect: DCSM C3265A, C3265B or C3265C (if previously disconnected).
    5. Connect: Driver Seat Cushion TED C3035 (if previously disconnected).
    6. Ignition ON.
    7. Using a scan tool, clear the RCM DTCs  .
    8. Cycle the ignition OFF then ON.
    9. Using a scan tool, perform RCM self-test.

    Are any RCM DTCs retrieved during self-test? 

    1. Yes: REFER to DTC CHART: RESTRAINT CONTROL MODULE (RCM) for pinpoint test direction.
    2. No: The repair is complete. RETURN the vehicle to the customer.
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