DIAGNOSTIC CODE 3-5 (BASIC)

Test 39

Checking effects of retarded static timing on high idle timing

1.If the high idle timing status was correct in Test 1 (the diagnostic tool indicated that timing was OK), or was too advanced (the diagnostic tool displayed “++”), proceed to the Electrical Diagnostic Test Section.

2.If the high idle timing status in Test 1 was too retarded (the diagnostic tool displayed “--”), reset the static timing. Retest to be sure the problem has been corrected.

3.Make a note that the static timing has been reset. Then proceed to the Electrical Diagnostic Test Section.

DIAGNOSTIC CODE 3-5 (ELECTRICAL)

DIAGNOSTIC BLINK CODE 3-5, ELECTRICAL TIMING ACTUATOR TESTS, ELECTRICAL SECTION

These diagnostic procedures are broken down into three sections: Basic Mechanical, Electrical and Advanced Mechanical. Begin with the Basic Mechanical Section.

When performing electrical tests, it is important to wiggle wires and connectors to identify intermittent connection problems.

This fault is only active above a specific engine speed and load. It may be inactive by the time the truck reaches the service shop.