JAC J2 - Air-Conditioning Switch and Relay



Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
197


Cylinder judging signal not reliable;


Sensor circuit failure.
After knock sensor fault flagging out the failure position, knock set control loop is Disconnect and the
advance angle of ignition stored in the ECU will be
fixed to a safe
angle by the
software program. When
the error frequency drops below the set value, the fault indication will reset.
5.
Removal
and
installation
1
）
 Removal
①
Disconnect knock sensor harness connector.
②
Unscrew knock sensor locking nut, remove the knock sensor.
Attention
:
■ Do
not
drop
or
damage
the
sensor.
2) Installation
Install with reversed steps of disassembly.
■
Tightening
torque:
16
-
24N
• m
IX.
Air-conditioning
switch
and
relay
1. Description
When air conditioner is turned on, the air conditioning switch will send the battery voltage signal to the
ECM. After air conditioner turned-on signal input, ECM drives electronic throttle to increase idling
speed of engine, and correct ignition advance angle. At the same time, ECM controls air conditioning
relay to make the compressor magnetic clutch working.
2. Inspection
Fig. 4.3.020