Infiniti M45 (Y34). Manual — part 492
IGNITION SIGNAL
EC-657
C
D
E
F
G
H
I
J
K
L
M
A
EC
6.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect ECM relay.
4.
Check harness continuity between ECM terminal 12 and ECM
relay terminal 3.
Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M135, F105
●
Fuse block (J/B) No. 2 harness connector M143
●
Harness for open or short between ECM and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
Check voltage between ECM relay terminal 5 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 9.
9.
DETECT MALFUNCTIONING PART
Check the following.
●
20A fuse
●
Fuse, fusible link and relay block (J/B) harness connector E3
●
Fuse block (J/B) No. 2 harness connector E215
●
Harness for open and short between ECM relay and fuse
>> Repair or replace harness or connectors.
10.
CHECK ECM RELAY
Refer to
EC-142, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace ECM relay.
Continuity should exist.
PBIB0040E
Voltage: Battery voltage
PBIB2078E
EC-658
IGNITION SIGNAL
11.
CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Check harness continuity between the following;
ECM terminal 12 and condenser terminal 1,
condenser terminal 2 and ground.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 12.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
12.
CHECK CONDENSER
Refer to
EC-659, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace condenser.
13.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1.
Reconnect all harness connectors disconnected.
2.
Disconnect ignition coil harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between ignition coil terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 14.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
Continuity should exist.
Voltage: Battery voltage
PBIB1116E
PBIB0138E
IGNITION SIGNAL
EC-659
C
D
E
F
G
H
I
J
K
L
M
A
EC
14.
CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between ignition coil terminal 2 and ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 15.
NG
>> Repair open circuit or short to power in harness or connectors.
15.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminals 18, 19, 20, 21, 29, 30, 31, 32 and ignition coil terminal
1. Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 16.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
16.
CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to
EC-659, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace ignition coil with power transistor.
17.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
ABS002TO
IGNITION COIL WITH POWER TRANSISTOR
1.
Turn ignition switch OFF.
2.
Disconnect ignition coil harness connector.
3.
Check resistance between ignition coil terminals as follows.
Continuity should exist.
Continuity should exist.
Terminal No. (Polarity)
Resistance
Ω
[at 25
°
C (77
°
F)]
1 and 2
Except 0 or
∞
1 and 3
Except 0
2 and 3
PBIB0847E
EC-660
IGNITION SIGNAL
CONDENSER
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Check resistance between condenser terminals 1 and 2.
Removal and Installation
ABS002TP
IGNITION COIL WITH POWER TRANSISTOR
Refer to
Resistance: Above 1 M
Ω
[at 25
°
C (77
°
F)]
PBIB0794E
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