Infiniti I30. Emission Control System (2003 year). Manual — part 43
2
CHECK VACUUM EXISTENCE
With CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Start engine and let it idle.
3. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
4. Turn VIAS control solenoid valve “ON” and “OFF”, and check for the existence of vacuum under the following condi-
tions.
SEC129D
MTBL1174
Without CONSULT-II
1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine and let it idle.
4. Apply 12V of direct current between VIAS control solenoid valve terminals 1 and 2.
5. Check for the existence of vacuum under the following conditions.
SEC130D
MTBL1175
OK or NG
OK
䊳
Repair or replace power valve actuator.
NG
䊳
GO TO 3.
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VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Diagnostic Procedure (Cont’d)
EC-673
3
CHECK VACUUM HOSE
1. Stop engine.
2. Check hoses and tubes between intake manifold and power valve actuator for crack, clogging, disconnection or
improper connection.
SEF109L
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Replace vacuum hose.
4
CHECK VACUUM TANK
1. Disconnect vacuum hose connected to vacuum tank.
2. Connect a vacuum pump to port (at the center) of vacuum tank.
3. Apply vacuum and make sure that vacuum exists at another port.
SEC131D
OK or NG
OK
䊳
GO TO 5.
NG
䊳
Replace vacuum tank.
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Diagnostic Procedure (Cont’d)
EC-674
5
CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Stop engine.
2. Disconnect VIAS control solenoid valve harness connector.
SEC058D
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEF603X
OK or NG
OK
䊳
GO TO 7.
NG
䊳
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors M229, F66
쐌
Fuse block (J/B) connector M19
쐌
15A fuse
쐌
Harness continuity between fuse and VIAS control solenoid valve
䊳
Repair harness or connectors.
7
CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 27 and terminal 2. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 8.
NG
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
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VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Diagnostic Procedure (Cont’d)
EC-675
8
CHECK VIAS CONTROL SOLENOID VALVE
With CONSULT-II
1. Reconnect disconnected harness connector.
2. Turn ignition switch ON.
3. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode.
4. Check air passage continuity and operation delay time under the following conditions.
PBIB0177E
MTBL1301
Without CONSULT-II
Check air passage continuity and operation delay time under the following conditions.
MEC488B
MTBL1302
OK or NG
OK
䊳
GO TO 9.
NG
䊳
Replace VIAS control solenoid valve.
9
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Diagnostic Procedure (Cont’d)
EC-676
SEC120D
Component Description
NHEC0817
IGNITION COIL & POWER TRANSISTOR
NHEC0817S01
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.
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IGNITION SIGNAL
Component Description
EC-677
Wiring Diagram
NHEC0819
MEC558D
IGNITION SIGNAL
Wiring Diagram
EC-678
MEC559D
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IGNITION SIGNAL
Wiring Diagram (Cont’d)
EC-679
MEC560D
IGNITION SIGNAL
Wiring Diagram (Cont’d)
EC-680
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
5
6
7
15
16
17
Y/R
G/R
L/R
GY
PU/W
GY/R
Ignition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4
Ignition signal No. 5
Ignition signal No. 6
[Engine is running]
쐌
Warm-up condition
쐌
Idle speed
NOTE:
The pulse cycle changes depending on rpm at idle.
0 - 0.2V
★
SEC986C
[Engine is running]
쐌
Warm-up condition
쐌
Engine speed is 2,500 rpm.
0.1 - 0.3V
★
SEC987C
★
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
NHEC0820
1
CHECK ENGINE START
Turn ignition switch “OFF”, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-II)
䊳
GO TO 2.
Yes (Without CONSULT-
II)
䊳
GO TO 3.
No
䊳
GO TO 4.
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IGNITION SIGNAL
Wiring Diagram (Cont’d)
EC-681
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
2. Make sure that all circuits do not produce a momentary engine speed drop.
PBIB0133E
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 14.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminals 5, 6, 7, 15, 16, 17 and ground with oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as shown below.
NOTE:
The pulse cycle changes depending on rpm at idle.
SEC159D
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 14.
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-682
4
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.
SEF366X
OK or NG
OK
䊳
GO TO 5.
NG
䊳
Go to TROUBLE DIAGNOSIS FOR POWER SUPPLY, EC-152.
5
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Check voltage between ECM terminal 31 and ground with CONSULT-II or tester.
SEC914C
Voltage: Battery voltage
OK or NG
OK
䊳
GO TO 11.
NG
䊳
GO TO 6.
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IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-683
6
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect ECM relay.
SEC044D
3. Check harness continuity between ECM relay terminal 31 and ECM relay terminal 7. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 8.
NG
䊳
GO TO 7.
7
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors E15, F18
쐌
Harness for open or short between ECM and ECM relay
䊳
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 6 and ground with CONSULT-II or tester.
SEF368X
OK or NG
OK
䊳
GO TO 10.
NG
䊳
GO TO 9.
9
DETECT MALFUNCTIONING PART
Check the following.
쐌
15A fuse
쐌
Harness for open and short between ECM relay and fuse
䊳
Repair or replace harness or connectors.
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-684
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
䊳
GO TO 19.
NG
䊳
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
䊳
GO TO 12.
NG
䊳
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 engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK
䊳
GO TO 13.
NG
䊳
Repair open circuit or short to power in harness or connectors.
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IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-685
13
CHECK CONDENSER
Check resistance between condenser terminals 1 and 2.
SEF369X
OK or NG
OK
䊳
GO TO 14.
NG
䊳
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
䊳
GO TO 16.
NG
䊳
GO TO 15.
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-686
15
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors F57, F221
쐌
Harness for open and short between ignition coil and harness connector F18
䊳
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 engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
䊳
GO TO 17.
NG
䊳
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
䊳
GO TO 18.
NG
䊳
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
䊳
GO TO 19.
NG
䊳
Replace ignition coil with power transistor.
19
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
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IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-687
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
쐌
Engine: After warming up
쐌
Air conditioner switch: “OFF”
쐌
Shift lever: “N”
쐌
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-688
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