Intermittent Fault, Signal Absent

Intermittent fault, signal absent

Checking cables
Check flywheel/carrier plate for damage.
Check signal cables between engine control module (ECM) terminal 24 and terminal 54 and engine speed (RPM) sensor terminals 1 and 2 for an intermittent short-circuit to supply voltage Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and for an intermittent short-circuit to ground Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and for an intermittent short-circuit and for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.

Hint: With the ignition on the voltage between the engine speed (RPM) sensor connector terminals 1 and 2 and the ground terminal should be approximately 1.8 V.

If no fault was found in the above fault-tracing try a new engine speed (RPM) sensor.

Other information
- To connect the test box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.
- To replace the engine speed (RPM) sensor, see Replacing the engine speed (RPM) sensor Service and Repair.













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