117 - Throttle Valve Signal Implausible

P0121 - THROTTLE VALVE SIGNAL IMPLAUSIBLE

Diagnosis conditions
- Engine running

Possible fault cause
- Open circuit or short circuit in the wiring
- Throttle position sensor faulty
- DME control module faulty

Affected terminals
- Terminal I/7, I/9, III/8, III/10, III/24 and III/25

NOTE:
- Fault P0121 only appears in conjunction with fault P1121 or P1122.
- The system operates in pedal sensor standby mode, i.e. the angle of the accelerator pedal is calculated from the residual position sensor signal.
- The opening angle of the throttle valve is limited to 30%.
- The dynamic of the throttle valve is restricted.

Diagnosis/Troubleshooting

Step 1:

Figure 1:

Figure 2:

Steps 2 - 3:

Step 4:

Figure 1:

NOTE: The wires to the throttle part are routed via connector X59/2.

Steps 5 - 6: