Intermittent Fault, Faulty Signal

Intermittent fault, faulty signal

Checking cables
Check engine control module (ECM) and knock sensor (KS) connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check for damaged or loose pins.
Check signal cable between engine control module (ECM) terminals 76 and 19 and knock sensor (KS) terminals 2 and 3 for an intermittent open-circuit and remedy according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check signal cable between engine control module (ECM) terminal 51 and knock sensor (KS) terminal 1 for an intermittent short-circuit to ground and remedy according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults , for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
If no fault is found in the above fault-tracing try a new knock sensor (KS).

Other information
- To connect the test box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.
- To replace the knock sensor (KS), see Replacing the knock sensor (KS) .













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