Code 43: Elect Spark Control: Notes
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1990 Pontiac Grand Prix, 1990 Pontiac Firebird, 1990 Pontiac 6000, 1990 Oldsmobile Cutlass Supreme, and 1990 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.
Code 43 indicates the ECM has seen high or low voltage at circuit No. 496 for longer than 5 seconds with the engine running.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- If conditions for test as described above are being met, Code 43 will currently set and the "SES" light will be illuminated.
- The ECM has a 5-volt pull-up resistor, which should be present at the knock sensor terminal.
- This test determines if internal resistance of knock sensor is within an acceptable range.