Functional Test
- Connect Diagnostic Readout Box II (DRB-II) diagnostic tester to vehicle and proceed to state display mode. Start engine and observe knock unit value.
- Using tip of screwdriver, gently tap cylinder block near knock sensor and observe knock value. Knock value should increase while tapping on cylinder block.
- If knock value does not increase while tapping on the cylinder block near knock sensor, check knock sensor for proper connection. If connection is good, replace knock sensor.