QuestionI have a flashing A/C light; the A/C works fine for a while, but then starts to blow warm air and the A/C light starts to flash. Any ideas?
AnswerINSPACTION PROCEDURE 7: The A/C Indicator Flashes <Vehicles with 3.0L Engine> .
DIAGNOSIS
STEP 1. Check the drive belt tension.
Refer to GROUP 0, Lubrication and Maintenance Service −
Drive Belts P.0-10.
Q: Is the drive belt tension in good condition?
YES : Go to Step 2.
NO : Repair. Then go to Step 4.
STEP 2. Check the revolution pick-up sensor.
Measure the resistance between terminals 1 and 3. Check that
the measured value is at the standard value.
Standard value: 405 ± 35 Ω when the ambient
temperature is 20 °C (68 °F)
Q: Is the measured value at the standard value?
YES : Go to Step 3.
NO : Replace. Then go to Step 3.
STEP 3. Check the harness wire between the compressor
connector B-18 and automatic compressor controller
connector C-15.
Q: Is the harness wire between the compressor connector
B-18 and automatic compressor controller connector C-
15 in good condition?
YES : Go to Step 4.
NO : Repair. Then go to Step 4.
STEP 4. Measure the automatic compressor controller
terminal voltage.
Refer to P.24-17.
Q: Is the automatic compressor controller terminal voltage
in good condition?
YES : Go to Step 5.
NO : Replace. Then go to Step 5.
STEP 5. Check symptoms.
Q: Does the A/C indicator flashes?
YES : Go to Step 1.
NO : This diagnosis is complete. (If no malfunctions are not
found in all steps, an intermittent malfunction is
suspected. Refer to Introduction, How to Use
Troubleshooting/Inspection Service Points
