Isuzu N-Series. Service manual — part 427
6E-44 EMISSION AND ELECTRICAL DIAGNOSIS
Equipped Without Exhaust Gas Recirculation and Variable Swirl System
Legend
1. Extension harness
12. FICD diaphragm
2. FICD vacuum S/W valve
13. Injection pump
3. ANECOM vacuum S/W valve
14. White stripe
4. I/T throttle vacuum S/W valve
15. Yellow stripe
5. VSV fix bolt
16. Green stripe
6. VSV bracket
17. Intake throttle diaphragm
7. Case fix bolt
18. Inter cooler
8. Vacuum hose assembly
19. Accelerator cable
9. Vacuum hose clip
20. Guide plate
10. Vacuum pipe
21. Frame
11. Heater hose
N6A1157E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-45
Exhaust Brake and Engine Warm-up Control
Legend
1. Batteries
15. Vacuum switch valve
2. Fusible link wire
16. Vacuum chamber: Exhaust brake
3. Charge relay
17. Exhaust brake valve
4. Fuse
18. Key switch
5. Exhaust brake relay
19. Engine warming-up switch
6. Exhaust brake switch
20. Engine warming cut relay
7. Indicator light
21. Engine coolant temperature sensor
8. Diode
22. ECM
9. Exhaust brake control relay
23. Vacuum chamber: Intake throttle
10. Neutral switch
24. Intake throttle
11. Clutch switch
25. Magnetic valve intake throttle
12. Accelerator switch
26. Actuator FICD
13. Magnetic valve: Exhaust brake
27. Generator (L)
14. Vacuum pump
28. Starter relay coil
N6A1158E
6E-46 EMISSION AND ELECTRICAL DIAGNOSIS
DTC-P13 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
N6A1159E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-47
Appearance of Water Temperature Sensor and
Connector Pin Assignment
Temperature Sensor
Connector Pin Assignment
Measure Resistance at Engine Coolant Temperature (ECT) Sensor
Caution:
When measuring resistance with a circuit tester, be careful not to damage or deform the terminals.
Legend
1. 3 pin connector
2. Engine coolant temperature sensor
N6A1160E
Legend
1. To ECT sensor
2. 3 pin gray
Connector No
Signal
1
Thermistor for engine
2
Thermistor for engine
3
Thermistor for meter
N6A1161E
Legend
1. Circuit tester
3. Engine coolant temperature sensor
2. Remove engine wire harness
4. Measure resistance between connector pin
N6A1162E
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