Initial Inspection and Diagnostic Overview

INSPECTION AND VERIFICATION

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage.
3. As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting, or incorrectly installed components, 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. NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the data link connector (DLC).

6. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.

If the scan tool does not communicate with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to Information Bus (Module Communications Network), No power to the scan tool, to diagnose no communication with the scan tool.

7. If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to Information Bus (Module Communications Network) to diagnose no response from the smart junction box (SJB) or powertrain control module (PCM).

8. Carry out the network test.
- If the scan tool responds with no communication from one or more modules, refer to Information Bus (Module Communications Network).
- If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).

9. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB or PCM.
10. If the SJB DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Chart. If the PCM DTCs retrieved are related to the concern, go to Computers and Control Systems. Diagnostic Trouble Code Tests and Associated Procedures
11. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures

Electronic Manual Temperature Control (EMTC) Module Cold Boot Process
The purpose of the cold boot process is to allow the EMTC module to reinitialize and calibrate the actuators. To carry out the cold boot process, follow the steps below.
1. Turn the ignition switch to the OFF position.
2. Disconnect the EMTC module electrical connectors.
3. Wait one minute.
4. Connect the EMTC module electrical connectors.
5. Turn the ignition switch to the ON position.
6. Select any position except OFF on the EMTC module.

The EMTC module will now initialize and calibrate the actuators. Calibration of the actuators will take approximately 30 seconds.