Isuzu KB P190. Manual - part 888

Engine Management – V6 – Service Operations 

Page 6C1-3–28 

 

2 

Using connector test adaptor kit J 35616-A, connect a 
12 V battery, an on / off switch and a 3 A fused wire to 
the EVAP canister purge valve terminals as follows: 

• 

Positive lead to terminal 1. 

• 

Negative lead to terminal 2. 

 

Figure 6C1-3 – 31 

 

Do not apply 12 V to the EVAP canister purge 
valve continuously for more than three 
seconds as the EVAP canister purge valve 
will be damaged. 

3 

Turn the switch on, and listen for an audible click as the EVAP canister purge valve operates. Whilst the switch is in 
the on position, blow air through the inlet port.  

4 

If no air passes through the EVAP canister purge valve, check the valve inlet and outlet ports for any obstructions 
and rectify if necessary. If there are no obstructions, replace the valve. 

Reinstall 

Reinstallation of the evaporative emission canister purge valve is the reverse of the removal procedure, noting the 
following: 

1 

Connect the purge valve hose quick connect fittings, refer to 2.11  Evaporative Emission (EVAP) Canister Purge 
Valve Quick Connect Fittings. 

2 

Road test the vehicle and check for correct operation, taking particular note that no air leaks are evident. 

2.13  Fuel Rail Assembly 

 

A depressurised fuel system contains 
residual fuel that can be spilled during service 
operations, refer to 6C Fuel System – V6 for 
further information on handling fuel. 

Remove 

1 

Depressurise the fuel system, refer to 6C Fuel System - V6. 

2 

Turn the ignition switch off. 

Engine Management – V6 – Service Operations 

Page 6C1-3–29 

 

N O T E  

After removing the upper intake manifold, plug 
the lower manifold opening to prevent dirt and 
other contaminants from entering. 

3 

Remove the upper intake manifold assembly, refer to 6A1 Engine Mechanical – V6. 

4 

Disconnect the fuel feed hose from the fuel rail, refer to 6C Fuel System - V6. Plug the fuel line openings to prevent 
dirt and other contaminants from entering. 

5 

Slide the engine wiring harness connector retaining 
latch (1) in the direction of the arrow to disconnect the 
connector from the fuel injector harness. 

 

Figure 6C1-3 – 32 

 

Clean around the area where the fuel 
injectors enter the lower intake manifold. 

6 

Remove the bolt (1), three places, attaching the fuel 
rail to the lower intake manifold. 

 

Care must be taken when removing the fuel 
rail and injector assembly to prevent damage 
to the injector spray tips and injector harness 
connector terminals. 

Support the fuel rail and injector assembly 
after removal. 

7 

Remove the fuel rail and injector assembly. 

8 

Plug all fuel line and manifold openings after removal 
to prevent dirt and other contaminants from entering.

Figure 6C1-3 – 33 

Engine Management – V6 – Service Operations 

Page 6C1-3–30 

 

Disassemble 

Fuel Injector 

Remove 

For each fuel injector: 

1 

Slide the fuel injector wiring connector locking tab (1) 
upwards in the direction of the arrow. 

2 

Disconnect the connector from the fuel injector. 

Figure 6C1-3 – 34 

3 

Using a flat blade screwdriver, remove the fuel injector 
retaining clip (1) from the fuel injector (2). Discard the 
retaining clip. 

 

Figure 6C1-3 – 35 

Engine Management – V6 – Service Operations 

Page 6C1-3–31 

 

4 

Remove the fuel injector (1) from the fuel rail. 

5 

Remove and discard the fuel injector seals (2). 

6 

As required, repeat for the remaining injectors and test 
each fuel injector, refer to the Test in this Section. 

Figure 6C1-3 – 36 

Test 

 

To prevent component damage use connector 
test adaptor kit J 35616-A. 

1 

Connect a digital ohmmeter using connector test 
adaptor kit J 35616-A to the fuel injector. 

2 

Measure the resistance across terminals A and B. 

3 

Compare the reading against the specification. 

Fuel injector resistance @ 20°C ............... 11.4 – 12.6 

Ω 

4 

If the resistance is not within specifications, replace 
the fuel injector.  

Figure 6C1-3 – 37 

Reinstall 

Reinstallation of the fuel injector is the reverse of the removal procedure, noting the following: 

1 

Install new fuel injector seals and lubricate with clean engine oil. 

2 

Install a new fuel injector retaining clip, refer to Figure 6C1-3 – 35.