Infiniti I35 (A33). Manual — part 338
10
CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.
SEF296X
OK or NG
OK
©
GO TO 19.
NG
©
Replace ECM relay.
11
CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check harness continuity between ECM terminal 31 and condenser terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check 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 GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between condenser terminal 2 and ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK
©
GO TO 13.
NG
©
Repair open circuit or short to power in harness or connectors.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-693
13
CHECK CONDENSER
Check resistance between condenser terminals 1 and 2.
SEF369X
OK or NG
OK
©
GO TO 14.
NG
©
Replace condenser.
14
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Disconnect ignition coil harness connector.
SEC120D
4. Turn ignition switch ON.
5. Check voltage between ignition coil terminal 3 and ground with CONSULT-II or tester.
SEF370X
OK or NG
OK
©
GO TO 16.
NG
©
GO TO 15.
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-694
15
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F57, F221
I
Harness for open and short between ignition coil and harness connector F18
©
Repair or replace harness or connectors.
16
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.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
©
GO TO 17.
NG
©
Repair open circuit or short to power in harness or connectors.
17
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 5, 6, 7, 15, 16, 17 and ignition coil terminal 1. Refer to Wiring Dia-
gram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 18.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
18
CHECK IGNITION COIL WITH POWER TRANSISTOR
Check resistance between ignition coil terminals 2 and 3.
SEF371X
OK or NG
OK
©
GO TO 19.
NG
©
Replace ignition coil with power transistor.
19
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-695
SEF375Z
Component Description
NHEC0383
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The
amount of fuel injected depends upon the injection pulse duration.
Pulse duration is the length of time the injector remains open. The
ECM controls the injection pulse duration based on engine fuel
needs.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0384
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
INJ PULSE-B2
INJ PULSE-B1
I
Engine: After warming up
I
Air conditioner switch: OFF
I
Shift lever: N
I
No-load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
B/FUEL SCHDL
ditto
Idle
2.3 - 2.9 msec
2,000 rpm
2.3 - 2.9 msec
INJECTOR
Component Description
EC-696
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