U–68
TROUBLESHOOTING
End Of Sie
NO.4 AIR INTAKE MODE DOES NOT CHANGE
A6E858001038W06
•
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
malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are
connected correctly and undamaged.
Diagnostic procedure
3
INSPECT BLOWER UNIT
•
Inspect fan in blower unit.
— Is fan free of interference from blower unit
case?
— Is fan free of foreign material and
obstructions?
•
Is fan okay?
Yes
Go to next step.
No
Remove obstruction, repair or replace fan and blower unit
case, then go to Step 5.
4
INSPECT BLOWER UNIT INTAKE VENT
•
Is blower unit intake vent clogged?
Yes
Remove obstruction, then go to next step.
No
Inspect if there are any obstructions in passage between
blower unit and A/C unit, then go to next step.
5
VERIFY THAT MALFUNCTION SYMPTOM
OCCURS AFTER REPAIR
•
Does air blow out?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.
STEP
INSPECTION
ACTION
4
Air intake mode does not change.
DESCRIPTION
•
Air intake mode does not change when switching REC/FRESH mode.
POSSIBLE
CAUSE
•
Malfunction in air intake actuator (Steps 1—6)
•
Malfunction in air intake door (Step 7)
STEP
INSPECTION
ACTION
1*
INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
ACTUATOR, WIRING HARNESS (BETWEEN
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR) OR ELSEWHERE
•
Turn ignition switch to ON position.
•
Test voltages at the following terminals of
climate control unit.
— Terminal 2K (12-pin, FRESH motor drive
signal)
— Terminal 2I (12-pin, RECIRCULATE
motor drive signal)
(See
U–47 Full-auto Air Conditioner
)
•
Are voltages okay?
Yes
Go to next step.
No
Go to Step 3.
2*
INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
ACTUATOR OR WIRING HARNESS
(BETWEEN CLIMATE CONTROL UNIT AND
AIR INTAKE ACTUATOR)
•
Test voltages at the following terminals of air
intake actuator.
— Terminal D (FRESH motor drive signal)
— Terminal F (RECIRCULATE motor drive
signal)
•
Are voltages as shown below?
— Terminal D:
approximately 0.5 V
during
RECIRCULATE and
approximately 10 V
during FRESH
— Terminal F:
approximately 10 V
during
RECIRCULATE and
approximately 0.5 V
during FRESH
Yes
Replace air intake actuator, then go to Step 8.
No
Repair wiring harness between climate control unit and air
intake actuator, then go to Step 8.
Содержание 6 2002
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Страница 1177: ...U 26 BASIC SYSTEM 12 Perform the refrigerant system performance test See U 13 REFRIGERANT SYSTEM PERFORMANCE TEST A6E8516W029...