Diagnostic trouble code (DTC) information
Condition
Model year 1999-2001.
If Engine control module (ECM) registers that the signal from the brake pedal position sensor is:
- Lower than 1.60 V for longer time than 0.32 seconds, then ECM-9400, Too low signal, is stored.
- Higher than 4.90 V for longer time than 0.32 seconds, then ECM-9400, Too high signal, is stored.
- Between 4.74 V and 4.90 V for longer time than 0.32 seconds, then ECM-9400, Faulty signal, is stored.
For upgraded software, released during year 2006 or later, the fault type Faulty signal is no longer necessary and therefore has been removed. With regards to detection times for the other fault types, these are increased from 0.32 to 10 seconds.
See Identifying upgraded software ECM/ETM
Model year 2002.
Engine control module (ECM) receives, via CAN-net, information about brake pedal position from brake control module (BCM). If Engine control module (ECM) registers that the signal is not updated on the CAN-net for longer time than 0.5 seconds, or that brake control module (BCM) indicates that the information is not usable for longer time than 0.5 seconds, then diagnostic trouble code ECM-9400, Faulty signal, is stored.
For upgraded software, released during year 2006 or later, the above detection times increased from 0.5 to 10 seconds.
See Identifying upgraded software ECM/ETM
For more information about the electronic throttle system and related components such as the electronic throttle module, accelerator pedal position sensor, brake light switch, clutch pedal position sensor, and brake pedal position sensor:
Substitute Value
Cruise control off.
Cruise control off during entire operating cycle in which fault was detected. If the fault is no longer present, the function is available the next time the car is started.
Possible Source
Signal too high:
- Open circuit on signal cable.
- Open-circuit in the ground lead.
- Short-circuit to supply voltage in the signal cable.
- defective brake pedal position sensor.
Signal too low:
- short-circuit to ground in the signal cable
- defective brake pedal position sensor.
Faulty signal:
- Incorrectly installed brake pedal sensor.
- contact resistance in terminals
- defective brake pedal position sensor.
This diagnostic trouble code is generated in combination with other trouble codes. Information on the possible root cause is described.
See Information about combined diagnostic trouble codes (DTCs)
Fault symptom[s]
- Electronic throttle system warning lamp lights
- cruise control does not function at all.