DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
DETAILED FLOW
1.LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symptom occurs.
>> GO TO 2.
2.VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to HAC-157, "Work Procedure".
>> GO TO 3.
3.GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to HAC-181, "Symptom Table".
>> GO TO 4.
4.REPAIR OR REPLACE
Repair or replace the specific parts.
>> GO TO 5.
5.FINAL CHECK
Final check.
Is the inspection result normal? YES >> Inspection End.
NO >> GO TO 3.
OPERATION INSPECTION
Work Procedure
DESCRIPTION
The purpose of the operational check is to check that the individual system operates normally.
Check condition : Engine running at normal operating temperature.
Check condition : Blower control dial in OFF position.
Check condition : REC off (LED extinguished).
Check condition : VENT selected (LED illuminated).
Check condition : DEF off (LED extinguished).
OPERATION INSPECTION
1.CHECK BLOWER
Is the test result normal? YES >> GO TO 2.
NO >> Refer to HAC-174, "Diagnosis Procedure".
2.CHECK A/C SWITCH LED
Is the test result normal? YES >> GO TO 3.
NO >> Refer to HAC-168, "Diagnosis Procedure".
3.CHECK A/C SWITCH
Confirm that the compressor clutch engages (sound or visual inspection).
Is the test result normal? YES >> GO TO 4.
NO >> Refer to HAC-178, "Diagnosis Procedure".
4.CHECK FRONT AIR CONTROL MODE LEDS
Is the test result normal? YES >> GO TO 5.
NO >> Refer to HAC-160, "A/C SWITCH ASSEMBLY : Diagnosis Procedure".
5.CHECK DISCHARGE AIR
Is the test result normal? YES >> GO TO 6.
NO >> Refer to HAC-181, "Symptom Table".
6.CHECK REC LED
Is the test result normal? YES >> GO TO 7.
NO >> Refer to HAC-160, "A/C SWITCH ASSEMBLY : Diagnosis Procedure".
7.CHECK INTAKE DOOR OPERATION
Is the test result normal? YES >> GO TO 8.
NO >> Refer to HAC-165, "Diagnosis Procedure".
8.CHECK TEMPERATURE DECREASE
Is the test result normal? YES >> GO TO 9.
NO >> Refer to HAC-182, "Component Function Check".
9.CHECK TEMPERATURE INCREASE
Is the test result normal? YES >> Inspection End.
NO >> Refer to HAC-184, "Component Function Check".
Dtc/circuit diagnosis
U1000 can comm circuit
DTC Logic
DTC DETECTION LOGIC
CONSULT Display
DTC Detection Condition
Possible Cause
CAN COMM CIRCUIT
[U1000]
AV control unit is not transmitting or receiving
CAN communication signal for 2 seconds or
more.
CAN communication system.
...
DTC/circuit diagnosis
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis Procedure
Regarding Wiring Diagram information, refer to HAC-145, "Wiring Diagram" or
HAC-152, "Wiring Diagram".
1.CHECK FUSE
Check fuses [No. 5, 8 and 21, located in the fuse block (J/B)].
NOTE:
Ref ...
Precaution for Work
When removing or disassembling each component, be careful not to damage
or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
When removing (disengaging) components with a screwdriver or similar
tool, be sure to wrap the component
with a ...