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SYMPTOM TROUBLESHOOTING 07-03–5 07-03 End Of Sie NO.2 AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE id070300800500 Full-auto Air Conditioner • When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent Diagnostic procedure 2 Amount of air blown from vents does not change. DESCRIPTION • Malfunction in blower system POSSIBLE CAUSE • A/C unit malfunction • Blower motor malfunction • Malfunction in power MOS FET system • Climate control unit malfunction STEP INSPECTION ACTION 1 INSPECT HEATER BLOWER 40 A FUSE • Inspect the HEATER BLOWER 40 A fuse. • Is it normal? Yes Go to the next step. No Replace the fuse, then go to Step 15. If the fuse burns out 2 INSPECT TO SEE WHETHER MALFUNCTION • Turn the ignition switch to the ON position. • Turn the airflow volume control dial to ON position. • Recirculate air inside the vehicle. • Does the blower motor rotate smoothly? Yes Go to Step 4. No Go to the next step. 3 INSPECT A/C UNIT INTAKE VENT • Is A/C unit intake vent clogged? Yes Remove obstruction, then go to Step 15. No Inspect if there are any obstruction in the A/C unit passage, 4* INSPECT TO SEE WHETHER MALFUNCTION • Turn the ignition switch to ON position. • Turn the airflow volume control dial to OFF position. • Measure the voltage at the following blower motor terminal. signal) • Is voltage approx. 12 V? Yes Go to Step 8. No Go to the next step. 5* INSPECT TO SEE WHETHER MALFUNCTION • Measure the voltage at the following blower relay terminals. — Terminal A (B+ signal) • Is the voltage approx. 12 V? Yes Go to the next step. No Repair the wiring harness between the blower relay and 6* INSPECT TO SEE WHETHER MALFUNCTION • Measure the voltage at the following blower relay terminal. — Terminal D (GND signal) • Is the voltage approx. 0 V? Yes Go to the next step. No Repair the wiring harness between the blower relay and 7* INSPECT TO SEE WHETHER MALFUNCTION • Measure the voltage at the following blower relay terminal. signal) • Is the voltage approx. 12 V? Yes Repair the wiring harness between the blower relay and No Replace the blower relay, then go to Step 15. 1871-1U-06B(07-03).fm 5 ページ 2006年3月15日 水曜日 午前11時28分 |