Initial Inspection and Diagnostic Overview

INSPECTION AND VERIFICATION

1. Verify the customer's concern by operating the climate control system to duplicate the condition.

Visual Inspection Chart:

2. Inspect to determine if one of the mechanical or electrical concerns apply.
3. As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose fitting or incorrectly installed component, module and in-line electrical connectors and pins.
4. If the inspection reveals obvious concern(s) that can be readily identified, repair as required.
5. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the vehicle selection cannot be entered:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

If the diagnostic tool still does not allow with the vehicle selection to be entered, refer to the diagnostic tool manual.

6. Carry out the DATA LINK DIAGNOSTIC TEST using the diagnostic tool. If the diagnostic tool responds with:
- SCP+, SCP-, CAN or UBP circuits fault = ALL MODULE NO RESPONSE/NOT EQUIPPED, go to Information Bus (Module Communications Network) to diagnose the communications network concern.
- If the powertrain control module (PCM) is not listed for a communication concern, turn the A/C controls to OFF and carry out the self-test diagnostics for the PCM.
- If the remote climate control (RCC) module is not listed for a communication concern on vehicles equipped with EATC, carry out the Remote Climate Control Module Self-Test.

7. If any PCM or RCC module diagnostic trouble codes (DTCs) are retrieved and related to the concern, go to the POWERTRAIN CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX or the REMOTE CLIMATE CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX to continue diagnostics. Powertrain Control Module Diagnostic Trouble Code (DTC) Index Remote Climate Control Module Diagnostic Trouble Code (DTC) Index
8. If no DTCs related to the concern are retrieved, go to the SYMPTOM CHART to continue the diagnostics. Symptom Related Diagnostic Procedures
9. If the RCC module cannot be accessed by the diagnostic tool, GO to Pinpoint Test E. Test E: No Communication With the Remote Climate Control Module - EATC

Remote Climate Control Module Self-Test
- The remote climate control (RCC) module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A diagnostic tool must be used to retrieve these concerns.

- NOTE: Continuous memory (DTCs) can only be retrieved by the use of a diagnostic tool.

- The RCC module self-test will detect concerns in the system control functions and will display hard diagnostic trouble codes (DTCs). The vehicle interior temperature should be between 4°-38°C (40°-100°F) when carrying out the self-test. If the temperature is not within the specified range, false in-car temperature sensor DTCs will be displayed.
- The self-test can be initiated at any time. Normal operation of the system stops when the self-test is activated.
- To enter the self-test, press the OFF and floor buttons simultaneously and then press the AUTO button within 2 seconds. The display will show a dashed line in the center of the climate control display window of the integrated control panel (ICP).
- The test may run as long as 30 seconds. Record all DTCs displayed. The self-test is completed when 888 appears in the center of the climate control display window of the ICP.
- If any DTCs appear during the self-test, refer to the REMOTE CLIMATE CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX. Carry out the diagnostic procedure given under ACTION TO TAKE for each DTC given. Remote Climate Control Module Diagnostic Trouble Code (DTC) Index
- If a condition exists but no DTCs appear during the self-test, refer to the SYMPTOM CHART condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation. Symptom Related Diagnostic Procedures
- To exit the self-test and retain all DTCs, press the "-" (cooler) side of the TEMP button. The RCC module will exit the self-test and retain all DTCs.
- To exit the self-test and clear all DTCs, press the front defrost button. All RCC module DTCs will be cleared.
- Always exit the self-test before powering the system down (system turned off).
- Continuous memory DTCs will be deleted after 80 ignition switch ON cycles after the intermittent condition occurs.