939005176 - Y049 P0638 - THROTTLE VALVE CONTROL (SC TO EARTH)

The diagnostic equipment signals: Error P0638 (throttle valve control), with detail "short circuit to earth"
This error is detected if there is a short circuit to earth in the circuit connected to Pin 59 of the junction unit for at least 0.24 secs.
0Preliminary checkALL OKPROBLEMS ENCOUNTEREDACTION
Check, in the junction unit under the dashboard, that fuse F35 has not blown (it is the second from the right in the top row)    See B002 JUNCTION UNIT UNDER DASHBOARD Move on to Step 1The fuse has blownContinue carrying out the    See Test 1064BE CHECK TURBO VALVE PROTECTION FUSE
1Check on throttle casing operationALL OKPROBLEMS ENCOUNTEREDACTION
Check that the integrated throttle casing actuator is working properly by carrying out the    See Test 1060GO INTEGRATED THROTTLE BODY OPERATION CHECKEnd of diagnosis