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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 passenger seat to HIGH heat.
    2. Using a scan tool, perform DCSM self-test.

    Was DTC B272B retrieved on-demand during the self-test? 

    1. Yes: GO to 2  .
    2. No: GO to  5  .
  2. CHECK THE PASSENGER SEAT BACKREST 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: Passenger Seat Side Air Bag C339.
    4. Disconnect: DCSM C3265B.
    5. Disconnect: Passenger Seat Backrest TED C3039.
    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
      G08039253
      G08039254
      C3265B Ground
      Pin Circuit Measurement / Action Pin Circuit
      4 VHS36 (YE/BU)
      G08039255
      		 - Ground
      5 RHS20 (GN/BU)
      G08039256
      		 - 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 PASSENGER SEAT BACKREST TED THERMISTOR AND WIRING
    1. Connect: Passenger Seat Backrest TED C3039.
    2. Measure:
      DCSM DCSM
      G08039257
      G08039258
      C3265B C3265B
      Pin Circuit Measurement / Action Pin Circuit
      4 VHS36 (YE/BU)
      G08039259
      		 5 RHS20 (GN/BU)
      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 PASSENGER SEAT BACKREST TED THERMISTOR
    1. Disconnect: Passenger Seat Backrest TED C3039.
    2. Measure:
      Passenger Backrest TED Passenger Backrest TED
      G08039260
      G08039261
      C3039 Component Side C3039 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      5 -
      G08039262
      		 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 VHS36 (YE/BU)/VHS35 (VT/OG) or RHS20 (GN/BU)/RHS15 (GY/BN) for an open or high resistance. GO to  22.
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  5. CONFIRM THE FAULT WHILE MONITORING THE DCSM SEAT BACK THERMAL ELECTRIC DEVICE TEMPERATURE (PBKTEMP) AND SEAT CUSHION THERMAL ELECTRIC DEVICE TEMPERATURE (PCSHTEMP) PIDs 
    1. Set the passenger seat to OFF.
    2. Using a scan tool, clear DCSM DTCs  .
    3. Using a scan tool, view DCSM PIDs  .
      • Seat Cushion TED Temperature (PCSHTEMP)
      • Seat Back TED Temperature (PBKTEMP)
    4. NOTE: A crushed seat backrest 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 passenger 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 PBKTEMP PID increases incrementally and is greater than 15°C (27°F) of the PCSHTEMP PID, GO to 6  .

      If the PBKTEMP PID increases quickly (temperature "jumps" and does not increase incrementally) and is greater than 15°C (27°F) of the PCSHTEMP 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 passenger seat backrest TED and compare it to the airflow exhausting from the driver seat backrest TED.
    3. Carry out a wiggle test of the wire harnesses between the DCSM and the passenger seat backrest TED while monitoring blower operation of the TED. The blower should operate consistently and not change speeds

    Is the airflow exhausting from the passenger seat backrest TED comparable to the airflow exhausting from the driver seat backrest 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 passenger seat backrest TED is not comparable to the airflow exhausting from the driver seat backrest TED, GO to  8  .

      If the passenger seat backrest 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 passenger seat backrest TED with the passenger seat occupied and compare it to the airflow exhausting from the driver seat backrest TED with the driver seat occupied.

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

    1. Yes: GO to  16  .
    2. No: INSTALL a new passenger seat backrest foam pad and/or climate controlled seat manifold. CLEAR the DTCs  . REPEAT the self-test.
  8. CHECK THE PASSENGER SEAT BACKREST BLOWER FOR AN OBSTRUCTION OR RESTRICTED FILTER
    1. Ignition OFF.
    2. Inspect the blower of the passenger seat backrest 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 PASSENGER SEAT BACKREST 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: Passenger Seat Side Air Bag C339.
    3. Disconnect: DCSM C3265C.
    4. Disconnect: Passenger Seat Backrest TED C3039.
    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 Passenger Seat Backrest TED
      G08039263
      G08039264
      C3265C C3039
      Pin Circuit Measurement / Action Pin Circuit
      4 VHS21 (BU/WH)
      G08039265
      		 7 VHS16 (BU/GN)

    Is the resistance less than 3 ohms? 

    1. Yes: GO to 10  .
    2. No: REPAIR the circuit. GO to  22  .
  10. CHECK THE PASSENGER SEAT BACKREST BLOWER CIRCUIT FOR A SHORT TO VOLTAGE
    1. Ignition ON.
    2. Measure:
      DCSM Ground
      G08039266
      G08039267
      C3265C Ground
      Pin Circuit Measurement / Action Pin Circuit
      7 RHS08 (VT/WH)
      G08039268
      		 - Ground

    Is any voltage present? 

    1. Yes: REPAIR the circuit. GO to  22  .
    2. No: GO to 11  .
  11. CHECK THE PASSENGER SEAT BACKREST BLOWER CIRCUIT FOR A SHORT TO GROUND
    1. Ignition OFF.
    2. Measure:
      DCSM Ground
      G08039269
      G08039270
      C3265C Ground
      Pin Circuit Measurement / Action Pin Circuit
      8 CHS08 (BN/YE)
      G08039271
      		 - 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 PASSENGER SEAT BACKREST BLOWER CIRCUITS FOR AN OPEN
    1. Measure:
      DCSM Passenger Seat Backrest TED
      G08039272
      G08039273
      C3265C C3039
      Pin Circuit Measurement / Action Pin Circuit
      7 RHS08 (VT/WH)
      G08039274
      		 4 RHS03 (GY/OG)
      8 CHS08 (BN/YE)
      G08039275
      		 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 PASSENGER SEAT BACKREST 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:

      Passenger Seat Backrest TED Passenger Seat Backrest TED
      G08039276
      G08039277
      C3039 Component Side C3039 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      2 -
      G08039278
      		 4 -

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

    1. Yes: GO to 14  .
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  14. CHECK THE PASSENGER SEAT BACKREST 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:

      Passenger Seat Backrest TED Passenger Seat Backrest TED
      G08039279
      G08039280
      C3039 Component Side C3039 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      7 -
      G08039281
      		 4 -

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

    1. Yes: GO to 15  .
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  15. CHECK THE PASSENGER SEAT BACKREST TED INSTALLATION AND FOR CRUSHED SEAT BACKREST
    1. Ignition OFF.
    2. Remove the seat. REFER to Seat .
    3. Remove the seat cushion cover. REFER to Seat Backrest Cover .
    4. Inspect the passenger seat backrest.
      • Is the passenger seat backrest TED correctly installed?
      • Is the passenger seat backrest seat backrest foam pad crushed or restricted?
      • Is the passenger seat backrest 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 passenger seat backrest cover and seat and GO to  18  .
    2. No: CORRECTLY install the passenger seat backrest TED or INSTALL a new passenger seat backrest foam pad and/or climate controlled seat manifold. CONNECT the battery ground cable. GO to  22  .
  16. CHECK THE PASSENGER SEAT BACKREST 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: 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
      G08039282
      G08039283
      C3265B C3265B
      Pin Circuit Measurement / Action Pin Circuit
      4 VHS36 (YE/BU)
      G08039284
      		 5 RHS20 (GN/BU)
      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 PASSENGER SEAT BACKREST TED THERMISTOR
    1. Measure:
      Passenger Backrest TED Passenger Backrest TED
      G08039285
      G08039286
      C3039 Component Side C3039 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      5 -
      G08039287
      		 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 VHS35 (VT/OG)/VHS36 (YE/BU) or RHS15 (GY/BN)/RHS20 (GN/BU) for an open or high resistance. GO to  22  .
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  18. CHECK THE PASSENGER SEAT BACKREST 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 CHS06 (BU/BN) near DCSM C3265A-C and monitor the current draw.
    5. Start the vehicle and set the passenger seat to HIGH heat.

    Is the current draw less than 11 amps? 

    1. Yes: GO to 19  .
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  19. CHECK RESISTANCE OF THE PASSENGER SEAT BACKREST TED AND WIRING
    1. Ignition OFF.
    2. Disconnect: DCSM C3265A.
    3. Measure:
      DCSM DCSM
      G08039288
      G08039289
      C3265A C3265A
      Pin Circuit Measurement / Action Pin Circuit
      C CHS06 (BU/BN)
      G08039290
      		 D RHS06 (WH)

    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 PASSENGER SEAT BACKREST TED
    1. Disconnect: Passenger Seat Backrest TED C3039.
    2. Measure:
      Passenger Backrest TED Passenger Backrest TED
      G08039291
      G08039292
      C3039 Component Side C3039 Component Side
      Pin Circuit Measurement / Action Pin Circuit
      1 -
      G08039293
      		 3 -

    Is the resistance between 0.9 and 10 ohms? 

    1. Yes: REPAIR circuit CHS01 (GY/VT) or RHS01 (WH/VT) for an open or high resistance. GO to  22  .
    2. No: INSTALL a new passenger seat backrest TED. REFER to Seat Backrest Thermo-Electric Device (TED) . GO to  22.
  21. CHECK FOR CORRECT DCSM OPERATION
    1. Inspect the DCSM and passenger seat backrest 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 passenger 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 passenger 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: Passenger Seat Side Air Bag C339.
    3. Connect: DCSM C3265A, C3265B or C3265C (if previously disconnected).
    4. Connect: Passenger Seat Backrest TED C3039 (if previously disconnected).
    5. Ignition ON.
    6. Using a scan tool, clear the RCM DTCs  .
    7. Cycle the ignition OFF then ON.
    8. 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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