Diagnostic Trouble Code (DTC) Information

ECM-6400 RESET VALVE, FAULTY SIGNAL
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
- Diagnostic trouble code (DTC) ECM-6400 is stored if the engine control module (ECM) registers a fault in the signal cable to the camshaft reset valve.

Condition
- shutting off the variable camshaft

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- defective reset valve

Signal too low:
- short-circuit to ground in the signal cable
- power supply cable short-circuited to ground
- defective camshaft reset valve
- contact resistance
- open-circuit in signal cable
- open-circuit in the power supply cable

Condition
- malfunction indicator lamp (MIL) lit
- uneven idle