Page 1025 of 3171

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EC-45
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1 - 5: The numbers refer to the order of inspection.
ENGINE CONTROL
Crankshaft position sensor circuit 1 1 1 1EC-159
Camshaft position sensor circuit11EC-171
Turbocharger boost sensor circuit 1 1EC-153
Turbocharger boost control solenoid valve cir-
cuit11EC-309
Start signal circuitEC-348
Ignition switch circuitEC-71
Heat up switch circuitEC-319
Power supply for ECM circuit11EC-71
Cooling fan relay circuit 2EC-132
EGR volume control valve circuit 1EC-302
Glow relay circuit1EC-295
ECM relay (Self shut-off) circuit1EC-232
ECM 22 22222 2222EC-213
,
EC-215
,
EC-269
NATS (Nissan Anti-theft System)1EC-28
SYSTEM — Basic engine control systemSYMPTOM
Reference
page
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE)
Malfunction indicator illuminates.
Can be detected by CONSULT-II?BLACK SMOKE
WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA
Page 1026 of 3171
EC-46
TROUBLE DIAGNOSIS
Engine Control Component Parts Location
EBS01KCX
1. IPDM E/R 2. ECM 3. Glow relay
4. Turbocharger boost sensor 5. Refrigerant pressure sensor 6. Engine coolant temperature sensor
7. Fuel pump 8. Cooling fan motor 9. Intake air control valve actuator
10. Turbocharger boost control solenoid
valve11. Mass air flow sensor 12. Turbocharger boost control actuator
13. Camshaft position sensor 14. Glow plug 15. Fuel injector
16. Fuel rail pressure sensor 17. Intake air control valve control
solenoid valve18. EGR volume control valve
MBIB1198E
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: Vehicle front
1. Fuel pump temperature sensor 2. Fuel pump 3. Fuel rail pressure relief valve
4. Fuel rail 5. Engine coolant temperature sensor 6. EGR volume control valve
7. Fuel rail pressure sensor 8. Camshaft position sensor 9. Refrigerant pressure sensor
MBIB1388E
Page 1028 of 3171
EC-48
TROUBLE DIAGNOSIS
: Vehicle front
1. Glow relay 2. ECM 3. Crankshaft position sensor
(View from under the vehicle)
4. Turbocharger boost sensor
(View with front grille removed)5. ASCD brake switch 6. Stop lamp switch
7. Accelerator pedal position sensor
MBIB1249E
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TROUBLE DIAGNOSIS
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: Vehicle front
1. Turbocharger boost control solenoid
valve (View with air cleaner upper
case removed)2. Turbocharger boost control actuator 3. PNP switch (M/T)
(View from under the vehicle)
4. Intake air control valve control sole-
noid valve5. ASCD steering switch 6. RESUME/ACCELERATE switch
7. SET/COAST switch 8. MAIN switch 9. CANCEL switch
MBIB1289E
Page 1030 of 3171
EC-50
TROUBLE DIAGNOSIS
Circuit Diagram
EBS01KCY
MBWA1032E
Page 1031 of 3171
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EC-51
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MBWA1363E
Page 1032 of 3171

EC-52
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ECM Harness Connector Terminal Layout
EBS01KCZ
ECM Terminals And Reference ValueEBS01KD0
PREPARATION
1. ECM located in the engine room passenger side behind coolant
reservoir tank.
2. Remove ECM harness connector.
3. When disconnecting ECM harness connector, loosen it with
levers as far as they will go as shown in the figure.
4. Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.
lUse extreme care not to touch 2 pins at one time.
lData is for comparison and may not be exact.
ECM INSPECTION TABLE
Remarks: Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
MBIB0045E
BBIA0537E
PBIB1512E
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
1
2
3B
B
BECM ground[Engine is running]
lIdle speedApproximately 0V