Test Point 1 - Idle Speed Contact
TEST POINT 1 - Idle speed contact (Ohms) Ground short Break - Fault code 2_12Possible Causes, Elimination, Remarks
Check with circuit input test, using 9288 system tester or 9268 tester
9268 tester - Select the test step and depress the accelerator pedal.
9288 display: Idle speed contact closed
Idle speed contact open
9268 display: 1332 (idle speed contact closed)
0000 (idle speed contact open).
- If the display does not change, disconnect the plugs from the EZK and LH control units.
- Using test leads, connect ohmmeter between terminals 8 and 18.
Display:
Throttle valve closed < 10 Ohms
Throttle valve opening angle > 1° = infinite resistance
If the idle speed contact values are not reached during this test, it must be repeated directly at the throttle valve switch:
- Pull off plug at throttle valve switch. Connect ohmmeter between terminals 2 and 3 of the throttle valve switch, using test leads.
Display:
Throttle valve closed < 10 Ohms
Throttle valve opening angle > 1° = infinite resistance
- Check that setting is correct and adjust if necessary.
Possible cause: incorrectly adjusted throttle valve switch or accelerator cable.