Pinpoint Test E: The Dual Automatic Temperature Control (DATC) Module Does Not Respond To The Diagnostic Tool
WARNING: This page is about a different car, the 2005 Lincoln Navigator and 2005 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- E1 CHECK THE DATC MODULE C228B FOR DAMAGE
- Key in OFF position.
- Disconnect: DATC Module C228b.
- Inspect the DATC module C228b for damage.
- Is the DATC module C228b OK?
- Yes : GO to E2.
- No : REPAIR the DATC module C228b. CARRY OUT the data link diagnostics test.
- E2 CHECK CIRCUITS 2180 (WH/BK) AND 2181 (BK/YE) BETWEEN THE DATC MODULE C228B AND THE DATA LINK CONNECTOR (DLC) C251 FOR AN OPEN
- Measure the resistance between the DATC module C228b pin 2, circuit 2180 (WH/BK), harness side and the DLC C251 pin 3, circuit 2180 (WH/BK), harness side.
- Measure the resistance between the DATC module C228b pin 3, circuit 2181 (BK/YE), harness side and the DLC C251 pin 11, circuit 2181 (BK/YE), harness side.
- Are the resistances less than 5 ohms?
- Yes : GO to E3.
- No : REPAIR the circuit in question. CARRY OUT the data link diagnostics test.
- E3 CHECK FOR CORRECT DATC OPERATION
- Disconnect all the DATC connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the DATC connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new DATC module. REFER to CONTROL COMPONENTS . CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the data link diagnostics test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.