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EVAPORATOR TEMPERATURE SENSOR CIRCUIT (CONTINUED) 3. READ EVAPORATOR TEMPERATURE SENSOR VOLTAGE WITH DRB III T Turn the ignition off. Connect a jumper wire between the Evaporator Temperature Sensor Turn the ignition on. With the DRB III T , read the Evaporator Temperature Sensor voltage. Does the DRB III T display EVAP TEMP: 4.5 VOLTS or greater? Yes >> Go to 4 No >> Replace the Evaporator Temperature Sensor. (Refer to 24 - HEATING & AIR CONDITIONING/CONTROLS/EVAPO- Perform BODY VERIFICATION TEST. 4. MEASURE THE RESISTANCE OF THE EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT Turn the ignition off. Disconnect the A/C Heater Control Module harness connector. Note: Check connector - Clean/repair as necessary. Is the resistance below 5.0 ohms? Yes >> Go to 5 No >> Repair the Evaporator Temperature Sensor Signal circuit for an open. Perform BODY VERIFICATION TEST. ZH HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS 24 - 23 |