AC/Air Conditioning — Blinking Light a C Compressor Lock Sensor Circuit, page 38

AC–38
AIR CONDITIONING SYSTEM – TROUBLESHOOTING

Blinking Light A C Compressor Lock Sensor Circuit

CIRCUIT DESCRIPTION

This sensor sends 1 pulse per engine revolution to the A/C amplifier. If the number ratio of the compressor speed divided by the engine speed is smaller than a predetermined value, the A/C amplifier turns the compressor off. And, the indicator flashes at about 1 second intervals.

Diagnostic Sensor Check Detecting Condition | Trouble Area

All conditions below are detected for 3 secs. or more
(a) Engine speed: 450 rpm or more
(b) Ratio between engine and compressor speed deviates 20% or more in comparison to normal operation.

• Compressor • Compressor drive belt
• Compressor lock sensor
• Harness and connector between compressor and A/C amplifier
• A/C amplifier

WIRING DIAGRAM

A/C Amplifier

G-Y
26
II 1
G-Y
22
LOCK-IN
A12

1
Compressor
Lock Sensor
2

V-W
20
II 1
V-W
9
SG
A13

N08776