DTC 16

ECM Wiring:

CIRCUIT DESCRIPTION
DTC 16 will set when the ignition is "ON" and the engine RPM is greater than 1000 and the ECM is seeing an ignition fuel reference voltage of less than 8 volts.

During the time the failure is present, all ECM outputs will be disengaged. (The setting of additional DTCs may result.)

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. Test generator output to determine proper operation of the voltage regulator. Run engine at moderate speed and measure voltage across the battery. If less than 8 or over 16.5 volts, repair generator.

DIAGNOSTIC AIDS:

^ An intermittent may be caused by a poor connections, rubbed through insulation, a wire broken inside the insulation or poor ECM grounds.

^ Intermittent Test - Monitor BATT/IGN VOLTS display with a Tech 1 (or equivalent) scan tool while moving related connectors. If the failure is induced, the display will abruptly change. This may help to isolate the location of the malfunction.