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 Step 2

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?

—

Go to Step 5

Go to Step 3

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?

—

Go to Step 5

Go to Step 4

4

Replace the ECM.

Is the action complete?

Go to Step 5

—

5

1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”

Is DTC32 all right under Scan Tool Check?

—

Go to Step 6

Go to Step 2

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