International DT466 – ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS – Tachometer Output Circuit

The function diagram for the tachometer output circuit consists of the following:
• Remote tachometer
• Electronic Control Module (ECM)
• Camshaft Position (CMP) sensor
• Crankshaft Position (CKP) sensor
The ECM provides an output for a remote tachometer with a 0 V to 12 V digital signal that indicates engine speed. The frequency sent by the ECM is 1/5th of the actual engine rpm (12 pulses per engine revolution).

Tachometer Input Signal
The ECM receives a signal from the CMP sensor and calculates engine speed (rpm). The ECM sends the
calculated engine speed as a digital buffered TACH signal from the ECM connector to the owner installed tachometer.

Tachometer Diagnostic Trouble Codes (DTCs)
DTCs are not available for communication between the ECM and the remote tachometer.

 

24. November 2021 by samuel
Categories: International DT466 | Comments Off on International DT466 – ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS – Tachometer Output Circuit