Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Acura 3.5RL 1996-2004 Approved srm RL9604S11116A
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Main Menu Table of Contents
Idle Control System
Air Conditioning Signal
This signals the PCM when there is a demand for cooling from the air conditioning system.
Inspection of Air Conditioning
Signal. PCM CONNECTORS
Check for a short in the wire
(ACS line):
1. Turn the ignition switch OFF.
2. Disconnect the radiator fan Wire side of female terminals
control unit 12P connector.
3. Turn the ignition switch ON (II).
4. Measure voltage between
PCM connector terminals C2
and A26.
Check for a short in the wire (ACS ACS (PNK)
line):
1. Turn the ignition switch OFF.
NO 2. Disconnect the PCM connec-
Is there battery voltage?
tor C (12P).
3. Check for continuity between
YES
body ground and PCM con-
nector terminal C2.
YES Repair short in the wire between
Is there continuity? the PCM (C2) and the radiator
fan control unit.
NO
-- Substitute a known-good PCM
Check for an open in the wire
and recheck (see page 11-42
(ACC line):
for immobilizer information).
1. Turn the ignition switch OFF.
If prescribed voltage is now
2. Reconnect the radiator fan
available, replace the original
control unit 12P connector.
PCM.
3. Turn the ignition switch ON (II).
-- See the air conditioner inspec-
4. Momentarily connect PCM
tion (see section 22).
connector terminals A8 and
A26 with a jumper wire sever-
al times. PCM CONNECTOR A (26P)
(To page 11-117)
Wire side of female
terminals
Main Menu Table of Contents
(From page 11-116)
A/C CLUTCH RELAY CONNECTOR (C344)
Check for an open in the wire
(ACC line):
Is there a clicking noise from NO Momentarily connect the A/C
the A/C compressor clutch? clutch relay connector terminal
No. 4 to body ground with a
YES jumper wire several times.
Wire side of
female terminals
Is there a clicking noise from See air conditioner inspection
the A/C compressor clutch? (see section 22).
YES
Repair open in the wire between
the PCM (A8) and the A/C clutch
relay.
PCM CONNECTORS
Check the A/C operation:
1. Start the engine.
2. Turn the blower switch ON.
3. Turn the A/C switch ON.
Wire side of female terminals
Check for an open in the wire
NO (ACS line):
Does the A/C operate?
Measure voltage between PCM
connector terminals A26 and C2.
YES
Air conditioning signal is OK. Repair open in the wire between
NO
Is voltage less than 1.0 V? the PCM (C2) and the radiator fan
control unit.
YES
-- Substitute a known-good PCM
and recheck (see page 11-42
for immobilizer information).
If symptom/indication goes
away, replace the original PCM.
-- See the air conditioner inspec-
tion (see section 22).
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