CAT 3406E (Prefix 1MM or 2WS) Fault Code: 36 PID: SPN: 84 FMI: 10 Vehicle Speed signal rate of change
The ECM detects the following conditions:
•The vehicle speed signal changes more than 5 MPH on eight consecutive readings in three seconds.
•The engine speed is greater than the programmed “VSL Protection” minus 100 rpm.
•The “VSL Protection” parameter is programmed to a value that is less than 2120 rpm.
Probable Causes:
1) Fuel system restriction (Uncommon, but possible)
2) If speedometer is not accurate, then ECM is not programmed correctly
3) Vehicle speed sensor
4) Vehicle speed sensor wiring
5) ECM Connection/Harness
6) Speedometer failure
7) ECM Failure
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