Pinpoint Test E: Heating And Cooling - Intermittent Operation
- E1: CHECK FOR STORED DIAGNOSTIC TROUBLE CODE(S)
- E2: CABLE CONNECTION CHECK WARNING: Before work is completed, make the airbag supplemental restraint system safe. For additional information, refer to Standard Workshop Practices article of repair informationNOTE:
- The climate controlled seat's (heat and cool) functions will only operate when the vehicle's engine is running
- If a fault is identified and repaired, check for correct operation of the driver and front-passenger climate controlled seat (heat and cool) functions
- Identify from customer concern or stored DTC
s which Seat Climate Assembly is operating intermittently and confirm the harness connector is fully connected
Is the harness connector fully connected?
Yes: GO to E3.
No: Disconnect the harness connector, inspect connector and terminals for damage. Repair or replace if required. Reconnect connector and check operation
- E3: SYSTEM INTEGRITY CHECKS
- Check the condition of the climate assembly fixing to the seat backrest and make sure the outlet is correctly installed and secured to the seat
Is the climate assembly correctly installed and secured?
Yes: GO to E4.
No: Secure the climate assembly to the seat replacing any fixtures required and retest the system.
- Check the condition of the climate assembly fixing to the seat backrest and make sure the outlet is correctly installed and secured to the seat
- E4: SYSTEM INTEGRITY CHECKS
- Check the condition of the air intake and fan for blockages causing a restricted air flow.
Were any blockages found?
Yes: Remove any blockages and retest the system.
No: GO to E5.
- Check the condition of the air intake and fan for blockages causing a restricted air flow.
- E5: SYSTEM INTEGRITY CHECKS
- Check the air intake and fan for damage which could cause reduced functionality.
Was any damage to the air intake or fan found?
Yes: Replace the damaged climate assembly only, DO NOT replace in pairs.
No: GO to E6.
- Check the air intake and fan for damage which could cause reduced functionality.
- E6: SYSTEM INTEGRITY CHECKS
- Remove the climate assembly and inspect the climate assembly outlet duct is installed correctly to the seat backrest and the bellows within the seat backrest.
Was a concern found with the alignment and installation of the components?
Yes: Rectify as necessary and retest the system.
No: GO to E7.
- Remove the climate assembly and inspect the climate assembly outlet duct is installed correctly to the seat backrest and the bellows within the seat backrest.
- E7: SYSTEM INTEGRITY CHECKS
- Remove the seat backrest and inspect the bellows and the seat backrest cushion for damage.
Was any damage found to the seat backrest cushion or the bellows?
Yes: Rectify as necessary, replace the bellows and/or the seat backrest cushion. DO NOT replace the seat backrest cover as part of the repair.
No: GO to E8.
- Remove the seat backrest and inspect the bellows and the seat backrest cushion for damage.
- E8: WIRING HARNESS INTEGRITY CHECKS NOTE: The nyogel must not trace between pins of the connector, this can cause a potential short circuit
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, check the connectors are secure and fully latched and retest the system.
Were the connectors correctly installed?
Yes: GO to E9.
No: If the system began to operate as expected after reconnecting the connectors, complete a pin drag test to make sure that the female pin associated to the circuit is not loose. If any of the pins are loose or damaged, repair as necessary making sure that Nyogel (LR054614) is applied to the individual pins of the repaired connector.
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, check the connectors are secure and fully latched and retest the system.
- E9: WIRING HARNESS INTEGRITY CHECKS NOTE: The nyogel must not trace between pins of the connector, this can cause a potential short circuit
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, disconnect the electrical connector at the climate seat module and check for any damage, loose or bent pins in the module
Was a concern identified with the connector or pins?
Yes: Rectify as necessary, repair the connector or pins, and if the male pins in the module are damaged replace the module as necessary. Make sure that Nyogel (LR054614) is applied to the individual pins of the repaired connector.
No: Before reconnecting, GO to E10.
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, disconnect the electrical connector at the climate seat module and check for any damage, loose or bent pins in the module
- E10: WIRING HARNESS INTEGRITY CHECKS
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, disconnect the electrical connector at the climate assembly and check for any damage, loose or bent pins in the climate assembly
Was a concern identified with the connector or pins?
Yes: Rectify as necessary, repair the connector or pins, and if the male pins in the climate assembly are damaged replace the climate assembly as necessary. Make sure that Nyogel (LR054614) is applied to the individual pins of the repaired connector.
No: GO to E11.
- Refer to the electrical circuit diagrams and gain access to the affected climate assembly and climate seat module, disconnect the electrical connector at the climate assembly and check for any damage, loose or bent pins in the climate assembly
- E11: ELECTRICAL CIRCUIT CHECKS NOTE:
- The Nyogel must not trace between pins of the connector, this can cause a potential short circuit
- When carrying out the test the circuit must be isolated from climate assembly and the climate seat module. Make sure to record all connector numbers and readings on the warranty claim
- Refer to the electrical circuit diagrams and complete resistance tests between the climate assembly and climate seat module and check for short circuit, open circuit or high resistance.
Was a concern found with the wiring harness?
Yes: Repair the wiring using an overlay harness (if available), REFER to: WIRING HARNESS OVERLAY Make sure that Nyogel (LR054614) is applied to the individual pins of the repaired connector.
No: GO to E12.
- E12: HVAC SOFTWARE LEVEL CHECKS
- Reassemble all of the electrical circuits, using the Jaguar Land Rover approved diagnostic equipment, update the HVAC
to the latest level software, clear the DTC
s and retest the system.
Does the system operate as expected?
Yes: HVAC software fault, reassemble the vehicle and hand back to the customer.
No: GO to E13.
- Reassemble all of the electrical circuits, using the Jaguar Land Rover approved diagnostic equipment, update the HVAC
to the latest level software, clear the DTC
s and retest the system.
- E13: SYSTEM CHECKS
- Replace the individual affected climate assembly and retest the system.
Does the system operate as expected?
Yes: No further action required, reassemble the vehicle and hand back to the customer.
No: Raise a TA and report all of the above findings and information.
- Replace the individual affected climate assembly and retest the system.