2004 Lincoln LS Workshop Manual

2004 Lincoln LS Workshop Manual

Dual Electronic Automatic Temperature Control (DATC) Module Diagnostic Trouble Codes — DTCs

If using the scan tool or front panel diagnostics to check for DATC DTCs:

1. Check continuous DTCs.

2. Run DATC self-test. Refer to Front Panel DATC Self-Test (On-demand Diagnostic Trouble Codes — DTCs).

General Information:

- If the DTC is continuous only and does not appear in the self-test, this indicates an intermittent fault condition, such as a poor wiring connection or a loose terminal. If the DATC does not appear after running the self-test it may also indicate that the DTC may no longer exist.

- If the DTC is continuous and appears in the self-test, this indicates a hard fault. A hard fault suggests a permanent wiring failure, disconnected connector or component failure.

Front Panel DATC Module Self-Test (On-Demand Diagnostic Trouble Codes — DTCs)

On-demand DTCs are those that are reported by an ECU when a failure is detected while executing a diagnostic test. For the DATC module this means that all faults (hard) that occur while the module is conducting a self-test shall be reported as an on-demand DTC.

- The DATC module self-test will not detect concerns associated with data link messages such as engine coolant temperature or vehicle speed signals. The scan tool must be used to retrieve these concerns.

- The vehicle interior temperature should be between 0-32°C (32-90°F) when carrying out the self-test. I f the temperatures are not within the specified ranges, false temperature sensor DTCs may be displayed. Download File PDF

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