Scan Tool User Guide 33
Read Codes
6: Diagnostic Trouble Codes
Idle Air Adjust
The Idle Air Adjust function checks the status of the
base idle RPM.
1 Follow the steps in Read and Display Codes on page
27 to display the Options screen.
Figure 6.16: Options Screen and Idle Air Test Instruction Screens
(KOER Test)
2 Select Idle Air Adjust and press the ENTER key.
Several instruction screens appear (shown above).
3 Read the screens and follow all instructions.
If necessary, use the function keys to answer any
questions.
NOTE: Use the Review Codes option to view the codes
again; refer to Review Codes
on page 37. To clear the
codes, refer to Read Flash Codes
on page 36.
Wiggle Test
The Wiggle Test function lets you check for intermit-
tent breaks in connections and for open or short
circuits by manually wiggling vehicle wires.
1 Follow the steps in Read and Display Codes on page
27 to display the Options screen.
Figure 6.17: Options Screen and Wiggle Test Screen
2 Select Wiggle Test and press the ENTER key to
display the Wiggle Test screen (shown above).
3 Select either KOEO or KOER to do the test with the
key on and the engine either off (KOEO) or running
(KOER).
4 If you select KOER, start the vehicle’s engine.
5 Press the ENTER key. This displays an instruction
screen (Figure 6.18
on page 33).
Figure 6.18: Wiggle Test Instruction Screen
6 Press the OK function key to continue. Several
instruction screens appear.
7 Read the screens and follow all instructions. If
necessary, use the function keys to answer any
questions. Do this until the test screen appears
(Figure 6.19
on page 34).
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