Infiniti I30. Emission Control System (2003 year). Manual — part 46
Component Description
NHEC1240
ASCD indicator lamp illuminates to indicate ASCD operation status.
Lamp has two indicators, CRUISE and SET, and is integrated in
combination meter.
CRUISE indicator illuminates when CRUISE switch on steering
switch is turned ON to indicate that ASCD system is ready for
operation.
SET indicator illuminates when following conditions are met.
CRUISE indicator illuminates, and SET switch on steering switch
is turned ON while vehicle speed is within range of ASCD setting.
SET indicator remains lit during ASCD control. Refer to EC-54 for
ASCD functions.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC1474
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
CRUISE LAMP
쐌
Ignition switch: ON
쐌
CRUISE switch: Pressed at the
1st time
,
at the 2nd time
ON
,
OFF
SET LAMP
쐌
CRUISE switch: ON
쐌
When vehicle speed is between 40 km/h
(25 MPH) and 144 km/h (89 MPH)
쐌
COAST/SET switch: Pressed
ON
쐌
COAST/SET switch: Released
OFF
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ASCD INDICATOR LAMP
Component Description
EC-721
Wiring Diagram
NHEC1242
MEC899D
ASCD INDICATOR LAMP
Wiring Diagram
EC-722
Diagnostic Procedure
NHEC1243
1
CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
MTBL1260
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 2.
2
CHECK COMBINATION METER OPERATION
Check that combination meter operates normally.
OK or NG
OK
䊳
GO TO 3.
NG
䊳
Check combination meter circuit. Refer to EL-129.
3
CHECK INDICATOR CIRCUIT
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminals 24, 25 and ground with CONSULT-II or tester.
SEC028D
Battery voltage should exist.
OK or NG
OK
䊳
GO TO 5.
NG
䊳
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors F53, M223
쐌
Harness for open or short between combination meter and ECM
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
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ASCD INDICATOR LAMP
Diagnostic Procedure
EC-723
Wiring Diagram
NHEC0604
FOR USA
NHEC0604S03
MEC374E
SEF642XC
ELECTRICAL LOAD SIGNAL
Wiring Diagram
EC-724
FOR CANADA
NHEC0604S04
MEC375E
SEF642XC
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ELECTRICAL LOAD SIGNAL
Wiring Diagram (Cont’d)
EC-725
Diagnostic Procedure
NHEC0605
1
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 51 and ground under the following conditions.
SEC090D
MTBL1165
OK or NG
OK
䊳
GO TO 2.
NG
䊳
GO TO 3.
2
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check voltage between ECM terminal 51 and ground under the following conditions.
SEC090D
MTBL1166
OK or NG
OK
䊳
INSPECTION END
NG
䊳
GO TO 7.
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure
EC-726
3
CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn “ON” the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up?
Yes or No
Yes
䊳
GO TO 4.
No
䊳
Refer to EL-184, “Rear Window Defogger”.
4
CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 51 and rear window defogger relay terminal 5 and 7.
SEC125D
5. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 6.
NG
䊳
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors B1, M5
쐌
Harness connectors M229, F66
쐌
Diode M35
쐌
Harness for open and short between ECM and rear window defogger relay
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
7
CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch “ON” at 1st position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK
䊳
GO TO 8.
NG
䊳
Refer to EL-38, “HEADLAMP (FOR USA)” or “EL-52, “HEADLAMP (FOR CANADA) —
DAYTIME LIGHT SYSTEM”.
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ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont’d)
EC-727
8
CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect headlamp RH relay (Models for USA), daytime light control unit harness connector (Models for Canada).
4. Check harness continuity between ECM terminal 51 and headlamp LH relay terminal 7 under the following conditions.
(Models for USA)
SEC126D
5. Check harness continuity between ECM terminal 51 and daytime light control unit terminal 7 under the following condi-
tions.(Model for Canada)
SEC127D
6. Also check harness for short to ground and short to power.
OK or NG
OK
䊳
GO TO 10.
NG
䊳
GO TO 9.
9
DETECT MALFUNCTIONING PART
Check the following.
쐌
Harness connectors E81, M15
쐌
Harness connectors M229, F66
쐌
Diode E79
쐌
Harness for open and short between ECM and headlamp RH relay or daytime light control unit
䊳
Repair open circuit or short to ground or short to power in harness or connectors.
10
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont’d)
EC-728
Wiring Diagram
NHEC0407
MEC376E
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DATA LINK CONNECTORS
Wiring Diagram
EC-729
Fuel Pressure Regulator
NHEC0408
Fuel pressure at idling kPa (kg/cm
2
, psi)
Approximately 350 (3.57, 51)
Idle Speed and Ignition Timing
NHEC0409
Target idle speed*1
No-load*2 (in “P” or N” position)
A/T: 675
±
50 rpm
Air conditioner: ON
In “P” or N” position
825 rpm or more
Ignition timing*1
In “P” or N” position
15°
±
5° BTDC
*1: Throttle position sensor harness connector connected
*2: Under the following conditions:
쐌
Air conditioner switch: OFF
쐌
Electric load: OFF (Lights, heater fan & rear window defogger)
쐌
Steering wheel: Kept in straight-ahead position
Mass Air Flow Sensor
NHEC0411
Supply voltage
Battery voltage (11 - 14)V
Output voltage at idle
1.1 - 1.5*V
Mass air flow (Using CONSULT-II or GST)
2.0 - 6.0
g·m/sec at idle*
7.0 - 20.0
g·m/sec at 2,500 rpm*
*: Engine is warmed up to normal operating temperature and running under no-load.
Engine Coolant Temperature Sensor
NHEC0412
Temperature °C (°F)
Resistance k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
Heated Oxygen Sensor 1 Heater
NHEC0414
Resistance [at 25°C (77°F)]
3.3 - 4.0
Ω
Fuel Pump
NHEC0415
Resistance [at 25°C (77°F)]
0.2 - 5.0
Ω
Injector
NHEC0417
Resistance [at 20°C (68°F)]
13.5 - 17.5
Ω
Calculated Load Value
NHEC0420
Calculated load value % (Using CONSULT-II or GST)
At idle
10 - 35
At 2,500 rpm
10 - 35
Intake Air Temperature Sensor
NHEC0421
Temperature °C (°F)
Resistance k
Ω
25 (77)
1.9 - 2.1
Heated Oxygen Sensor 2 Heater
NHEC0422
Resistance [at 25°C (77°F)]
3.3 - 4.0
Ω
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Pressure Regulator
EC-730
Fuel Tank Temperature Sensor
NHEC0424
Temperature °C (°F)
Resistance k
Ω
20 (68)
2.3 - 2.7
50 (122)
0.79 - 0.90
Throttle Control Motor
NHEC1332
Resistance [at 25°C (77°F)]
Approximately 1 - 15
Ω
Crankshaft Position Sensor (POS)
NHEC1414
Refer to “Component Inspection”, EC-316.
Camshaft Position Sensor (PHASE)
NHEC0639
Refer to “Component Inspection”, EC-325.
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SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Tank Temperature Sensor
EC-731
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