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• When Monitored: • Set Condition: Possible Causes (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT OPEN (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE (G939) SUN SENSOR RETURN CIRCUIT OPEN SUN SENSOR A/C HEATER CONTROL NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC Diagnostic Test 1. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. Measure the voltage of the (G139) Sun Sensor No. 2 Signal circuit. What voltage is present? Above 5.2 Volts Go To 2 4.8 Volts to 5.2 Volts Go To 3 Below 4.8 Volts Go To 5 2. CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (G139) Sun Sensor No. 2 Signal circuit. Is the voltage above 0.2 volts? Yes >> Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES/ FRONT CONTROL MODULE - DIAGNOSIS AND TEST- No >> Replace the A/C Heater Control in accordance with the Ser- vice Information. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 ELECTRICAL/ELECTRONIC CONTROL MODULES/ FRONT CONTROL MODULE - DIAGNOSIS AND TEST- 24 - 290 HVAC - ELECTRICAL DIAGNOSTICS LX |