Processing the downstream temperature sensor, the data amount of frame DM 1DCU received by CAN is wrong. Key failure factors related to immediate torque limitation in DCU. Usually, the DCU module of urea aftertreatment is faulty. Please check the power supply, fuse and connector of DCU post-processing part related to maintenance.

Note: When the indicator light is flashing or always on, some instruments will have corresponding notes.

Faults that cause the NCD lamp to light up, which in turn leads to torque limitation and speed limitation are shown in the following table:

1. When the urea level of the whole vehicle is lower than 10%, the driver alarm system will be started immediately, and the NCD light will be yellow and always on. Normal driving will not be affected at this time, and urea needs to be added immediately. When the urea level is below 5%,

The engine will be limited to 75%. When the urea level is less than 2%, the speed limit of the whole vehicle is 20 km/h, and the urea injection exceeds 12%, the fault will be cured immediately.

2. When urea is not injected, the urea pressure fails to be established, or the urea nozzle is blocked due to unqualified quality, the driver alarm system will be started immediately, and the NCD light will be yellow all the time. Engine transportation

When the line exceeds 10 hour, the engine will be limited to 75%, and when the engine runs for more than 20 hours, the speed limit of the whole vehicle will be 20 km/h.