1.CHECK FUSE
Check 10A fuse [No. 3, located in the fuse block (J/B)].
NOTE:
Refer to
Fuse, Connector and Terminal Arrangement
.
Is the inspection result normal?
YES
>>
GO TO 2
.
NO
>>
Replace the fuse after repairing the applicable circuit.
2.CHECK ECV POWER SUPPLY CIRCUIT
Turn the ignition switch OFF.
Disconnect the ECV connector.
Turn the ignition switch ON.
Check voltage between ECV harness connector and ground.
(+)
(−)
Voltage
ECV
—
Connector
Terminal
F36
2
Ground
Battery voltage
Is the inspection result normal?
YES
>>
GO TO 3
.
NO
>>
Repair the harnesses or connectors.
3.CHECK ECV CONTROL SIGNAL
With CONSULT-III
Turn the ignition switch OFF.
Connect the ECV connector.
Perform the “HVAC TEST”: MODE 5 of HVAC active test mode.
Check output waveform between the A/C auto amp. harness connector and ground with the oscilloscope.
(+)
(−)
Condition
Output waveform
A/C auto amp.
—
Connector
Terminal
M66
24
Ground
HVAC TEST: MODE 5
Duty ratio: approx. 50 %
Is the inspection result normal?
YES
>>
Replace the compressor.
NO
>>
GO TO 4
.
4.CHECK CONTINUITY BETWEEN ECV AND A/C AUTO AMP.
Turn the ignition switch OFF.
Disconnect the ECV connector.
Disconnect the A/C auto amp. connector.
Check continuity between ECV harness connector and A/C auto amp. harness connector.
ECV
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
F36
3
M66
24
Existed
Is the inspection result normal?
YES
>>
GO TO 5
.
NO
>>
Repair the harnesses or connectors.
5.CHECK ECV
Check continuity between ECV connector terminals.
ECV
Continuity
Terminal
Terminal
2
3
Existed
Is the inspection result normal?
YES
>>
Replace the A/C auto amp.
NO
>>
Replace the compressor.