Diagnostic Trouble Code (DTC) Information

ECM-91CF ENGINE CONTROL MODULE (ECM), INTERNAL FAULT
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION

Condition
The electronic throttle module has registered that the cruise control is active despite the brake light switch being closed. Diagnostic trouble code (DTC) ECM-91CF is stored in the engine control module (ECM).

Substitute value
- the accelerator pedal (AP) is ignored when braking
- the cruise control cannot be activated.

Possible source
- open-circuit, short-circuit to supply voltage or short-circuit to ground in signal cable for the stop lamp switch between the engine control module (ECM) and throttle unit
- defective engine control module (ECM)
- defective throttle unit.

Fault symptom[s]
- the accelerator pedal (AP) is ignored when braking
- the cruise control cannot be activated
- the ETS warning lamp lights (C70 and S/V70 -2000 only).