AC-27
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostic Procedure for Actuators
16
CHECK AUTO A/C CONTROL MODULE SIG-
NAL POWER SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from mode door
actuator.
3) Turn the ignition switch to ON.
4) Measure the voltage between mode door
actuator and chassis ground.
Connector & terminal
(B77) No. 8 (+) — Chassis ground (
−
):
Is the voltage 5 V?
17
CHECK HARNESS BETWEEN AUTO A/C
CONTROL MODULE AND MODE DOOR AC-
TUATOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from auto A/C
control module and mode door actuator.
3) Measure the resistance of harness
between auto A/C control module and mode
door actuator.
Connector & terminal
(i48) No. 13 — (B77) No. 8:
Is the resistance less than 1
Ω
?
Replace the auto
A/C control mod-
ule.
Repair the har-
ness between auto
A/C control mod-
ule and mode door
actuator.
18
CHECK ACTUATOR GROUND CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from auto A/C
control module.
3) Measure the resistance of harness
between auto A/C control module and mode
door actuator.
Connector & terminal
(i48) No. 16 — (B77) No. 10:
Is the resistance less than 1
Ω
?
Replace the mode
door actuator.
Repair the har-
ness between auto
A/C control mod-
ule and mode door
actuator.
19
CHECK POOR CONTACT.
Check poor contact in auto A/C control module
connector.
Is there poor contact in con-
nector?
Repair the poor
contact in auto A/C
control module.
Repair the con-
nector.
Step
Check
Yes
No
Содержание 2004 Forester
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