Illustration 82
g02738616
Typical example of an electronic unit injector
(1) Location of the injector code
1.
Record the injector code for each electronic unit
injector.
2.
Connect the electronic service tool to the
diagnostic connector. Refer to Troubleshooting,
“Electronic Service Tools”.
3.
Turn the keyswitch to the ON position.
4.
Select the following menu options on the electronic
service tool:
• Service
• Calibrations
• Injector Trim Calibration
5.
Select the appropriate cylinder.
6.
Click on the
“
Change
”
button.
7.
Input the applicable injector code that was
recorded in Test Step 1.
8.
Click on the
“
OK
”
button.
The injector code is loaded into the ECM.
9.
Repeat the procedure for each cylinder, as
required.
Exchanging Electronic Unit Injectors
Exchanging electronic unit injectors can help
determine if a combustion problem is in the electronic
unit injector or in the cylinder. If two electronic unit
injectors that are currently installed in the engine are
exchanged between cylinders, the injector codes
must also be exchanged. Record the injector trim
codes for the two injectors that are to be exchanged.
Use the electronic service tool to enter the injector
codes for the correct cylinders.
UENR0612
247
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