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HA -154 HEATING, VENTILATION AND AIR CONDITIONING NO Fault is intermittent caused by poor contact in the sensor’s and/or A/C controller’s connector or was repaired and TERMINAL AND CONNECTOR INSPECTION E3032942 1. Many malfunctions in the electrical system are caused by poor harness and terminals. 2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or 3. Has a problem been found? YES Repair as necessary and go to "Verification of Vehicle Repair" procedure. NO Go to "Signal circuit inspection" procedure. SIGNAL CIRCUIT INSPECTION EC98F659 1. Check for open in harness. 1) Ignition "OFF" 2) Disconnect Driver Air Mix potentiometer. 3) Measure resistance between terminal "6" of Driver Air Mix Potentiometer and terminal "18" of A/C control unit. Specification : Approx. 0 Ω * * 3 4 5 6 7 1 2 3 4 6 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 * * * * 25 26 3. Motor (Cool) 6. Potentiometer signal 7. Potentiometer ground Ω SCMHA6544L 4) Is the measured resistance within specifications? YES Go to "Check for short to ground in harness" procedure. |