Rodeo S 4WD V6-3.2L (1999)
Knock Sensor: Testing and Inspection
System Inspection
Knock Sensor (KS) System Check (Engine Knock, Poor Performance, or Poor Economy)
Circuit Description
The knock sensor (KS) sends an AC voltage signal to the powertrain control module (PCM). As the KS detects engine knock, the signal to the PCM
changes in amplitude and frequency. The PCM retards timing if the engine speed is over 900 RPM.
Diagnostic Aids
If the KS system checks OK, but detonation is the complaint, refer to Diagnosis, Detonation/Spark Knock. Refer Diagnosis By Symptom.
