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Home >> Chrysler >> 2021 >> Voyager LX, Gas >> Repair and Diagnosis >> Body & Frame >> Seats >> (Comfort Seats And Wheel Module (CSWM) - Electrical Diagnostics) >> DTC Troubleshooting >> B1EB4-1A-Rear Right Seat Heater Sensor - Circuit Resistance Below Threshold >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read DTCs and record on the repair order.
    2. Record the Environmental Data.
    3. With the scan tool, erase DTCs.
    4. Start the engine.
    5. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    6. With the scan tool, read Comfort Seat and Wheel Module (CSWM) DTCs.

      Is the same DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK THE RIGHT REAR HEATED 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 CSWM C3 harness connector.
    3. Measure the resistance between the (P673) Right Rear Heated Seat Temp Sense circuit and the (P968) Heated Seat Sensor Return circuit at the CSWM C3 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 (P673) RIGHT REAR HEATED SEAT TEMP SENSE CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (P673) Right Rear Heated Seat Temp Sense circuit at the CSWM C3 harness connector.

      Is there continuity between ground and the (P673) Right Rear Heated Seat Temp Sense circuit?

      Yes 

      • Repair the (P673) Right Rear Heated Seat Temp Sense circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  4. CHECK THE RIGHT REAR SEAT WIRING HARNESS AND TEMPERATURE SENSOR 
    1. Disconnect the Right Seat Cushion Heater harness connector.
    2. Measure the resistance between the (P673) Right Rear Heated Seat Temp Sense circuit and the (P968) Heated Seat Sensor Return circuit in the Right 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 Right Rear Seat wiring harness for a short.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

  5. CHECK RELATED HARNESS CONNECTIONS 
    1. Turn the ignition off.
    2. Disconnect all CSWM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all CSWM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    11. With the scan tool, read CSWM DTCs.

      Is the same DTC active?

      Yes 

      No 

      • Repairing the wiring harness or connections corrected the problem.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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