Infiniti F50. Manual - part 141
TROUBLE DIAGNOSIS
ATC-89
C
D
E
F
G
H
I
K
L
M
A
B
ATC
5.
CHECK COIL SIDE CIRCUIT OF A/C RELAY
1.
Turn ignition switch OFF.
2.
Reconnect A/C relay.
3.
Turn ignition switch ON.
4.
Check voltage between ECM harness connector F101 terminal
24 (G/W) and ground.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
CHECK CIRCUIT CONTINUITY BETWEEN ECM AND A/C RELAY
1.
Turn ignition switch OFF.
2.
Disconnect A/C relay and ECM connector.
3.
Check continuity between ECM harness connector F101 termi-
nal 24 (G/W) and A/C relay harness connector E3-2 terminal
1(L/Y).
OK or NG
OK
>> Replace A/C relay.
NG
>> Repair harness or connector.
7.
CHECK VOLTAGE FOR COMBINATION METER (FAN ON SIGNAL)
1.
Turn ignition switch ON.
2.
Check voltage between auto amp. harness connector M120 ter-
minal 29 (SB) and ground.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 11.
24 – Ground
: Battery voltage
RJIA0298E
24 – 1
: Continuity should exist.
RJIA0299E
Terminals
Condition
Voltage
(+)
(-)
Auto amp.
connector
Terminal No.
(Wire color)
M120
29 (SB)
Ground
Blower fan: ON
Approx. 0V
Blower fan: OFF
Approx. 5V
RJIA0300E