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Home >> Dodge and Ram >> 2015 >> Durango SXT, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 226 ((Heated Seat Module (HSM) - Electrical Diagnostics)) >> DTC Troubleshooting >> B1EB1-1A-Front Left Seat Heater Sensor Circuit - Resistance Below Threshold >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Heated Seat Module (HSM) DTCs and record on the repair order.
    2. With the scan tool, erase HSM DTCs.
    3. Turn the ignition off.
    4. Start the Engine.
    5. Turn the Heated Seat on.
    6. With the scan tool, read HSM DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • Go To  5
  2. CHECK THE LEFT FRONT SEAT TEMPERATURE SENSOR 
    Temperature Sensor Resistance
    °C °F Nominal (Ohms) Minimum (Ohms) Maximum (Ohms)
    -40 -40 336, 500 306, 959 366, 042
    -35 -31 242, 589 222, 163 263, 015
    -30 -22 177, 000 162, 706 191, 294
    -25 -13 130, 370 120, 273 140, 467
    -20 -4 97, 070 89, 860 104, 280
    -15 5 72, 929 67, 735 78, 124
    -10 14 55, 330 51, 551 59, 108
    -5 23 42, 315 39, 545 45, 085
    0 32 32, 650 30, 601 34, 699
    5 41 25, 388 23, 861 26, 914
    10 50 19, 900 18, 754 21, 046
    15 59 15, 708 14, 842 16, 574
    20 68 12, 490 11, 831 13, 149
    25 77 10, 000 9, 500 10, 500
    30 86 8, 057 7, 632 8, 482
    35 95 6, 531 6, 173 6, 889
    40 104 5, 327 5, 024 5, 630
    45 113 4369 4111 4626
    50 122 3603 3384 3822
    55 131 2986 2799 3174
    60 140 2488 2327 2649
    65 149 2083 1945 2221
    70 158 1752 1633 1871
    75 167 1, 481 1, 378 1, 585
    80 176 1, 258 1, 168 1, 348
    85 185 1, 072 994.2 1, 151
    90 194 917.7 849.4 986.0
    95 203 788.5 728.6 848.4
    100 212 680.0 627.4 732.6
    1. Turn the ignition off.
    2. Disconnect the HSM C2 harness connector.
    3. Measure the resistance between the (P687) Left Front Heated Seat Temp Sense circuit and the (P968) Heated Seat Sensor Return circuit at the HSM C2 harness connector.
    4. Compare the measured resistance to the Temperature Sensor Resistance chart.

      Is the resistance within the specifications listed in the chart?

      Yes 

      • Go To  3

      No 

      • Go To  4
  3. CHECK (P687) LEFT FRONT HEATED SEAT TEMP SENSE CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (P687) Left Front Heated Seat Temp Sense circuit at the HSM C2 harness connector.

      Is there continuity between ground and the (P687) Left Front Heated Seat Temp Sense circuit?

      Yes 

      • Repair the (P687) Left Front Heated Seat Temp Sense circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

  4. CHECK THE LEFT FRONT SEAT WIRING HARNESS 
    1. Disconnect the Left Seat Cushion Heater harness connector.
    2. Measure the resistance between the (P687) Left Front Heated Seat Temp Sense circuit and the (P968) Heated Seat Sensor Return circuit at the Left Seat Cushion Heater connector.
    3. Compare the measured resistance to the Temperature Sensor Resistance chart.

      Is the resistance within the specifications listed in the chart?

      Yes 

      • Repair or replace the Left Front Seat wiring harness for a short.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Left Front Seat Temperature Sensor (Left Front Seat Cushion Heater Element) in accordance with the Service Information. Refer to PAD, HEATER, REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  5. CHECK THE WIRING AND CONNECTORS 
    1. The conditions necessary to set the DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for shorted and open circuits. Attempt to reproduce the condition by adjusting the seat(s).
    3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Verify the seat wiring harness is routed correctly to the Heated Seat Module (HSM).
    4. Check Service Bulletins for any possible causes that may apply.

      Were any problems found?

      Yes 

      No 

      • Test complete.
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