CODE 17, rpm signal problem 3.8l: Notes
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Verifies spark reference circuit is not shorted to ground or open in ignition jumper harness.
- If a window on harmonic balancer is lined up with 18X Hall Effect switch, ignition module will ground spark reference signal. Starter may have to be bumped several times to obtain a voltage reading.
- Voltage reading should be lower than reading obtained with engine not running, indicating a pulsed reference signal.