Maintenance Manual for J2 Sedan
Electronic Control System
225
es
Check if the voltage between the control side of A/C compressor
relay (namely Pin 86# of relay)
and the negative pole of pow
er source
is about 3.7V by multimeter by the
Yes
Check if the circuit connecting control side of A/C compressor relay
(namely Pin 86# of relay) to Pin 61# of ECU is
es
s
Check if the electromagnetic clutch of A/C compressor operates
Fault code: P0647 “the control circuit of A/C compressor relay is short to power source”
S/N
result
1
Connect the diagnosis device and adapter, and turn the ignition switch
es To
Unplug the A/C compressor relay, turn the ignition key to “ON”
position, and check if the voltage between the relay power supply
side (namely Pins 87# and 85# of relay) and the negative pole of
power source is about 12V.
Yes
the harness
3
Check if the circuit of relay power supply side is open or short to
es
Check if the voltage between the control side of A/C compressor
relay (namely Pin 86# of relay)
and the negative pole of pow
er source
.
Yes
5
Check if the circuit connecting control side of A/C compressor relay
(namely Pin 86# of relay) to Pin 61# of ECU is
es
s
6
Check if the electromagnetic clutch of A/C compressor operates
clutch
Fault code: P1651 “the control circuit of engine malfunction lamp (SVS) is in trouble”
step
Connect the diagnosis device and adapter, and turn the ignition switch
es
Test the action of engine malfunction lamp by the “Actuator action
test” of diagnosis device, and observe if it is
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