Isuzu N-Series. Service manual — part 468

6E-208 EMISSION AND ELECTRICAL DIAGNOSIS

Working Check

Apply powervoltage between the terminals, there
is no problem if the negative pressure does not rise
when applied to the input port.

Caution:
When measuring resistance with a circuit tester, be
careful not to damage or deform the terminals.

3. Exhaust Gas Recirculation (EGR) Valve

With negative pressure applied to the diaphragm
chamber, make sure that the valve is smoothly ac-
tuated to make the area between (1) and (2) venti-
lated.
Startup: About -13.3

± 2.7 kPa (-100 ± 20 mmHg /

-1.93

± 0.39 psi)

Check to see if EGR valve is normally actuated un-
der the following conditions:
Engine coolant temp.: 80

°C (176°F) or higher

N6A1266E

N6A1362E

EMISSION AND ELECTRICAL DIAGNOSIS 6E-209

SPECIAL TOOLS

Illustration

Tool Number /

Description / Remarks

5-8840-0366-0 (J 39200)

/ High Impedance Multi-

meter (Digital Voltmeter-

DVM)

5-8840-0279-0 (J 23738-

A) / Vacuum Pump with

Gauge

5884003660

5884002790

6E-210 EMISSION AND ELECTRICAL DIAGNOSIS

EXHAUST 6F-1

ENGINE 4H SERIES

SECTION 6F

EXHAUST

Caution:
Exhaust system components must have enough clearance from the underbody to prevent overheating of the floor
pan and possible damage to the passenger compartment, insulation and trim materials.

Contents

GENERAL DESCRIPTION . . . . . . . . ... 6F-2

Component . . . . . . . . . . . . . . 6F-2
Gasket . . . . . . . . . . . . . . . ... 6F-2

ON-VEHICLE SERVICE . . . . . . . . . ... 6F-4

Component . . . . . . . . . . . . . . 6F-4
Removal . . . . . . . . . . . . . . . 6F-4
Installation . . . . . . . . . . . . . . . 6F-5