LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1368 ((Comfort Seats & Wheel Module (CSWM) - 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 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR ANY SERVICE BULLETINS OR MODULE SOFTWARE UPDATES 
    1. Check for any applicable Service Bulletins or Flash updates related to the DTC.

      Are there any applicable Service Bulletins or Flash updates?

      Yes 

      No 

      • Go To  2
  2. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  3

      No 

  3. CHECK THE HEATED SEAT TEMPERATURE SENSOR 
    Temperature Sensor Resistance
    °C °F Nominal (Ohms) Minimum (Ohms) Maximum (Ohms)
    -40 -40 336500 306959 366042
    -35 -31 242589 222163 263015
    -30 -22 177000 162706 191294
    -25 -13 130370 120273 140467
    -20 -4 97070 89860 104280
    -15 5 72929 67735 78124
    -10 14 55330 51551 59108
    -5 23 42315 39545 45085
    0 32 32650 30601 34699
    5 41 25388 23861 26914
    10 50 19900 18754 21046
    15 59 15708 14842 16574
    20 68 12490 11831 13149
    25 77 10000 9500 10500
    30 86 8057 7632 8482
    35 95 6531 6173 6889
    40 104 5327 5024 5630
    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 1481 1378 1585
    80 176 1258 1168 1348
    85 185 1072 994.2 1151
    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 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 in the CSWM 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  4

      No 

      • Go To  5
  4. CHECK THE (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 CSWM 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 

      • Go To  6
  5. CHECK THE (P687) LEFT FRONT HEATED SEAT TEMP SENSE CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT IN THE CSWM C2 HARNESS CONNECTOR 
    1. Disconnect the Left Front Seat Cushion Heater harness connector.
    2. Check for continuity between the (P687) Left Front Heated Seat Temp Sense circuit and all other circuits at the CSWM C2 harness connector.

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

      Yes 

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

      No 

  6. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all CSWM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. 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.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all CSWM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read CSWM DTCs.

      Is the DTC active?

      Yes 

      No 

      • Repairing the wiring harness or connections corrected the problem.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
scientia non olet · About LEMON Manuals