Test Number 3)
Because Code 43 sets when signal voltage on spark retard line remains low, this test should cause signal on that line to go high. Control module should see 12-volt signal as a "no knock" signal if control module and wiring are okay.
Because Code 43 sets when signal voltage on spark retard line remains low, this test should cause signal on that line to go high. Control module should see 12-volt signal as a "no knock" signal if control module and wiring are okay.