Isuzu N-Series. Manual — part 435
6E-76 EMISSION AND ELECTRICAL DIAGNOSIS
Appearance of Electronic Vacuum Regulating
Valve (EVRV): Exhaust Gas Recirculation
(EGR) Sensor and Connector Name
EVRV: EGR
EVRV: EGR Connector
Measure Resistance at EVRV: EGR
Caution:
When measuring resistance with a circuit tester, be careful not to damage or deform the terminals.
N6A1189E
Legend
1. To EVRV: EGR
2. 2 pin
Connector No
Signal
1
GND
2
SIG
N6A1190E
Legend
1. Circuit tester
3. Measure resistance between connector pin
2. Remove EVRV wire harness
N6A1191E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-77
Resistance value
Notice:
Resistance value is difference according to the engine temperature (condition of engine warming up).
Inspection Point
Resistance Value
(k
Ω)
Reference
Connector
Pin No.
2 pin Black
2
←→ 1
12
±1 (for 12 volt)
48
±2 (for 24 volt)
SIG
←→ GND
1
←→ Body
∞
SIG
←→ Body
Step
Action
Value
YES
NO
1
Was the “on-board diagnostic (OBD) system
check performed?
—
Go to self diag
system check
2
1. Ignition “OFF”
2. Disconnect the EVRV from the wiring har-
ness connector.
3. Check a short to voltage of the EVRV sig-
nal circuit and GND circuit between the
EVRV connector and the ECM.
4. Repair if necessary.
Has DTC32 been corrected?
—
3
1. Ignition “OFF”
2. Disconnect the ECM connector from
ECM.
3. Check the short to voltage of EVRV circuit
between the ECM and EVRV connector
4. Repair if necessary.
Has DTC32 been corrected?
—
4
Replace the ECM.
Is the action complete?
—
5
1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”
Is DTC32 all right under Scan Tool Check?
—
6
Is any current trouble other than DTC32 dis-
played by scan tool?
—
Go to trouble code
section
Trouble code clear
6E-78 EMISSION AND ELECTRICAL DIAGNOSIS
DTC-P33 Variable Swirl System (VSS) Control Circuit Low Voltage
N6A1196E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-79
Appearance of VSV for VSS and Connector
Name
VSV for VSS
VSV Connector
Measure Resistance at VSV for VSS
Caution:
When measuring resistance with a circuit tester, be careful not to damage or deform the terminals.
N6A1189E
Legend
1. 2 pin
Connector No
Signal
1
SIG
2 GND
N6A1198E
Legend
1. Circuit tester
3. Measure resistance between connector pin
2. Remove VSV wire harness
N6A1191E
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