LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 ((Comfort Seat & Wheel Module (CSWM) - Electrical Diagnostics)) >> DTC Troubleshooting >> B1E99-11-Front Left Heater Control Circuit - Circuit Short To Ground >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. 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 DTCs and record on the repair order.
    2. Record the Environmental Data.
    3. With the scan tool, erase DTCs.
    4. Start the engine.
    5. Turn the Left Front Heated Seat on.
    6. With the scan tool, read CSWM DTCs.

      Is the same DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (P187) LEFT FRONT SEAT HEATER CONTROL CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the CSWM C2 harness connector.
    3. Disconnect the Left Front Seat Back Heater harness connector.
    4. Disconnect the Left Front Seat Cushion Heater harness connector.
    5. Check for continuity between ground and the (P187) Left Front Seat Heater Control circuit at the CSWM C2 harness connector.

      Is there continuity between ground and the (P187) Left Front Seat Heater Control circuit?

      Yes 

      • Repair or replace the seat wiring harness for a short to ground on the (P187) Left Front Seat Heater Control circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE (P187) LEFT FRONT SEAT HEATER CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    1. Check for continuity between the (P187) Left Front Seat Heater Control circuit and all other circuits in the CSWM C2 harness connector.

      Is there continuity between the (P187) Left Front Seat Heater Control circuit and any other circuit?

      Yes 

      • Repair the (P187) Left Front Seat Heater Control circuit for a short to another circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE LEFT FRONT SEAT CUSHION HEATER ELEMENT RESISTANCE 
    1. Measure the resistance of the Left Front Seat Cushion Heater element between the (P187) Left Front Seat Heater Control circuit and the (Z919) Ground circuit at the Left Front Seat Cushion Heater component connector.
      NOTE:

      When probing a circuit always use an appropriate back probing tool to prevent any possible damage to the terminals.

      Is the resistance 5.04 Ohms (± 10%)?

      Yes 

      • Go To  5

      No 

      • Inspect the Left Front Seat Cushion Heater element pigtail wiring harness for a short to ground and repair as necessary. If no problems are found, replace the 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 LEFT FRONT SEAT BACK HEATER ELEMENT RESISTANCE 
    1. Measure the resistance of the Left Front Seat Back Heater element between the (P187) Left Front Seat Heater Control circuit and the (Z919) Ground circuit at the Left Front Seat Back Heater component connector.
      NOTE:

      When probing a circuit always use an appropriate back probing tool to prevent any possible damage to the terminals.

      Is the resistance 5.13 Ohms (± 10%)?

      Yes 

      • Go To  6

      No 

      • Inspect the Left Front Seat Back Heater element pigtail wiring harness for a short to ground and repair as necessary. If no problems are found, replace the Left Front Seat Back Heater element in accordance with the Service Information. Refer to PAD, HEATER, REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  6. 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 .
scientia non olet · About LEMON Manuals