Code 43, Knock Sensor W/O Spark Module (Single Sensor) - A/T: Notes
WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Suburban, 1994 GMC Rally Camper Special, and 1994 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Code 43 will set when vehicle reaches normal operating temperature (but not overheating), high engine load is indicated by MAP sensor and voltage on circuit No. 496 is greater than 3.5 volts DC or less than 1.5 volts DC. This step determines if system is functioning properly at current time.
- This step determines state of 5-volt reference signal applied to sensor.
- Checks knock sensor internal resistance.