626 LX L4-2.0L DOHC (1999)
Compressor Clutch Relay: Testing and Inspection
Compressor Cut-Off Relay
1. Start the engine and let it idle.
2. Turn the A/C switch and the fan switch ON.
3. Check if the operation sound of the A/C compressor electromagnetic clutch is heard. (A/C compressor starts to work.)
4. Fully open the throttle valve. Check if the operation sound the A/C compressor magnetic clutch is heard. (A/C compressor stops to work.) Then, 3
- 6 seconds after, check if the operation sound of the A/C compressor electromagnetic clutch is heard.
5. Turn the A/C switch and the fan switch OFF.
6. If the operation sound is not heard:
1. Connect a jumper wire between both terminals of A/C pressure switch connector.
2. Turn the ignition switch ON.
3. Turn the A/C switch and the fan switch ON. Verify that operation sound is heard from A/C relay.
4. If the operation sound is heard, check the following PID using NGS tester.
-
TP V PID.
5. If the operation sound is not heard, check the following.
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A/C relay.
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Open or short to ground circuit in wiring harnesses and connectors (Main relay-A/C relay-PCM terminal 69)
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A/C related parts.