U0427

Implausible data was received from the electronic ignition switch.

Test 1: Check lines of circuit 15.

Test 2: Possible cause:

- Test connection terminal 15.
Affected functions:

- Engine diagnosis
- Fuel system

1. Check lines of circuit 15.
Test sequence

- Switch off ignition.
- Unplug 16-pin connector from control module N118 (Fuel pump control module).
- Measure direct voltage with multimeter between sockets [1.2] N118 and [1.13] N118
- Switch on ignition.
- Specified value:11V - 15V
Is the measurement value OK?

YES

Test 1.1: Check the CAN communication with control unit N73 (EIS [EZS] control unit).

1.1. Check the CAN communication with control unit N73 (EIS [EZS] control unit).
Warning!Communication with ECU required.


NO
The measurement value is not OK.Possible cause and remedy

- Test fuse, replace if necessary
- Inspect plug connections for corrosion, pinched insulation and loose contact.
- N10/1Fuse and relay modules
- Test terminal 15 connection from N10/1 (Front SAM control unit with fuse and relay module) and N3/10 (ME-SFI [ME] control unit).
End of test

2. No further information available.