Millenia L V6-2.5L DOHC (1997)
A/C Signal: Testing and Inspection
A/C Cut-Off Control System
SYSTEM INSPECTION
1. Position the vehicle on a chassis roller and start the engine.
2. Shift the selector lever into other than P and N.
3. Turn the A/C switch and the fan switch on.
4. Fully open the throttle valve. Then, 3-6 seconds after, check if the operation sound of the A/C compressor electromagnetic clutch is heard.
5. If the operation sound is not heard, do as follows.
A Connect the Special Service Tools New Generation Star (NGS) tester.
B Select the SIMULATION TEST function on the NGS display.
C Turn the A/C relay from OFF to ON by using the "A/C RLY" and check for the operation sound of the relay.
I.
If the operation sound is heard, check the following.
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PCM terminal voltage
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Load/no load distinction signal
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Closed throttle position signal
II. If the operation sound is not heard, check the following.
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A/C relay
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Open circuit in wiring harnesses and connector (Main relay - A/C relay - PCM)