6E–102 ENGINE DRIVEABILITY AND EMISSIONS
9 1. Connect the 5-8840-0378-0 Fuel Injector Testerand 5-8840-2589-0 Injector Adapter Cable to the
fuel injector harness connector.
2. Set the amperage supply selector switch on the fuel injector tester to the “Balance Test” 0.5-2.5
amp position.
3. Using the Scan Tool turn the fuel pump ON then OFF in order to pressurize the fuel system.
4. Record the fuel pressure indicated by the fuel pressure gauge after the fuel pressure stabilizes.
This is the first pressure reading.
5. Energize the fuel injector by depressing the “Push to Start Test” button on the fuel injector tester.
6. Record the fuel pressure indicated by the fuel pressure gauge after the fuel pressure gauge
needle has stopped moving. This is the second
pressure reading.
7. Repeat steps 1 through 6 for each fuel injector.
8. Subtract the second pressure reading from the first pressure reading for one fuel injector. The
result is the pressure drop value.
9. Obtain a pressure drop value for each fuel injector.
10. Add all of the individual pressure drop values. This is the total pressure drop.
11. Divide the total pressure drop by the number of fuel injectors. This is the average pressure drop.
Does any fuel injector have a pressure drop value that
is either higher than the average pressure drop or
lower than the average pressure drop by the specified
value? 10kPa
(1.5psi) Go to Step 10Go to
OBD
System Check
10 Re-test any fuel injector that does not meet the specification. Refer to the procedure in Step 11.
NOTE: Do not repeat any portion of this test before
running the engine in order to prevent the engine from
flooding.
Does any fuel injector still have a pressure drop value
that is either higher than the average pressure drop or
lower than the average pressure drop by the specified
value? 10kPa
(1.5psi) Go to Step 11Go to
Symptoms
11 1. Replace the faulty fuel injector(s). Refer to Fuel
Injector .
2. Disconnect the 5-8840-2589-0 Injector Adapter Cable for F/I check and re-connect the original F/I
check connector.
Is the action complete? — Verify repair —
Step
Action Value(s) Yes No
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ISUZU KB P190 2007
Engine Management – V6 – Diagnostics Page 6C1-2–43
6 Remove the upper intake manifold assembly, refer to 6A1 Engine Mechanical – V6.
NOTE
After removing the upper intake manifold, plug
the lower manifold opening to prevent dirt and
other contaminants from entering.
7 Connect Tool No. J 39021 Fuel Injector Tester (1), and Tool No. J 44602 (3) to the fuel injector connector. Refer to Figure 6C1-2 – 14.
Figure 6C1-2 – 14
Legend
1 Fuel Injector Tester – Special Tool J39021
2 Fuel Pressure Gauge – Special Tool SD28018
3 Fuel Injector Harness Adapter – Special Tool J44602
4 To Battery Positive Terminal 5 Battery Earth
6 First Pressure Reading
7 Second Pressure Reading
8 Connect the fuel injector tester battery positive lead (4) and battery negative lead (5) to the battery, refer to Figure 6C1-2 – 14.
9 Set the amperage supply selector of the fuel injector tester to the Balance Test 0.5 – 2.5 A position.
As the fuel pressure tends to increase after
the fuel injector stops fuel delivery, record the
fuel pressure value immediately after the fuel
injector stops fuel delivery. Do not record the
higher fuel pressure value.
10 Press the Push to Start Test Button on the fuel injector tester to activate the fuel injector.
11 Record the fuel pressure reading indicated by the fuel pressure gauge.
NOTE
The fuel pressure readings taken in Step 10 is
known as the second pressure reading
12 Repeat the balance test pressure reading for each fuel injector.
13 Perform the Fuel Injector Pressure Drop Calculation in this Section.
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ISUZU KB P190 2007
TRANSFER CONTROL SYSTEM 7D1-49
Step 4-3: (Same procedure as the step 3-3)
Stop the vehicle (close the accelerator and decrease the engine speed to L4: 3000rpm V6: 2000rpm or below).
(In case of AT): Set the transmission select lever to the N position.
(In case of MT): Set the transmission lever to the neutral position (stepping on the clutch lever is recommended).
Push the 4H button.
If shifting is not complete (indicator flashes at 2Hz), go to step 4-1.
5. When shifting from 4H or 4L to neutral
(Same procedure is required when shifting from 2H but in such a case, requirements for shifting from
2H to 4H are also applied.)
5-1 Neutral indicator continues flashing at 2Hz The neutral indicator continues flashing at 2Hz until 4H (4L) is completely separated in the transfer. If torsional
torque has accumulated between the transmission and road surface, separation may be difficult.
Step 5-1:
If the operation is not complete, execute step 7 for confirmation.
(In case of AT): Set the transmission select lever to the D position. After confirming that the gears are at the neutral position, return the lever to the N
position.
(In case of MT): Set the transmission lever to a vehicle running position and engage the clutch gently. After confirming that the gears are at the neutral position, return the lever to the
neutral position
5-2 When the neutral indicator flashes at 4Hz
As in the case of shifting from 4L to 4H, restriction is imposed to the operation from 4L or 4H (including 2H). If
the transmission lever is at a running range and engine speed is high (L4: 3000rpm, V6: 2000rpm or more)
while the vehicle is running, operation from the 4L or 4H (including 2H) of the transfer to the neutral is
impossible (restriction on operation).
Step 5-2:
Stop the vehicle.
(In case of AT): Set the transmission select lever to the N (or P) position.
(In case of MT): Set the transmission lever to the neutral position (at this time, stepping on the clutch is recommended).
Keep pushing the 2H and 4L button for 10 seconds.
Follow the start procedure for confirmation. (Confirmation of drive force is not transferred; same as in
step 5-1)
After the confirmation, set the transmission to the neutral position in the case of MT or to the neutral
position in the case of AT.
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ISUZU KB P190 2007
