Diagnostic Trouble Code (DTC) Information

ECM-91B7 THROTTLE UNIT, INTERNAL FAULT
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
The throttle unit has registered an internal or external fault and is unable to follow the requested throttle angle from engine control module (ECM) during the start up test for the throttle unit. Diagnostic trouble code (DTC) ECM-91B7 is stored in the engine control module (ECM).

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

Possible source
- the power supply to the throttle unit
- something is blocking the throttle position sensor (an oil film, dust etc.)
- poorly charged battery or corroded in the connecting cables
- old software in the throttle unit
- 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).