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On Board Diagnostic Logic DTC NO. DTC DEFINITION DTC DETECTION CONDITION DTC SET CONDITION POSSIBLE CAUSE U040F Temperature sensor open circuit or shorted to supply Turn ignition switch on The Instrument • Coolant • Harness or • Instrument cluster U040F Temperature sensor shorted to ground The Instrument • Coolant • Harness or • Instrument cluster DTC Confirmation Procedure: Before performing the following procedure, confirm that battery voltage is more than 12 V. • Turn ignition switch off. • Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available. • Turn ignition switch on and record and erase DTC. • Start engine and warm it up to the normal operating temperature. • Select view DTC and data stream. • If the DTC is detected, the condition is current. Go to Diagnostic Procedure - Step 1. • If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou- bleshooting in Section 15 Body & Accessories for more information). NOTE : NOTE : DIAGNOSIS & TESTING 15
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