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Test U

PINPOINT TEST U: NO COMMUNICATION WITH THE FRONT ELECTRONIC MODULE (FEM)


Test U1:






Test U2:






Normal Operation
The FEM controls RH exterior mirrors, power adjustable pedals, both interior and exterior lighting active antitheft functions and the brake shift interlock. Power is supplied through the central junction box (CJB) fuse 20 (10A) and fuse 30 (5A) on Circuits 29-DK20 (OG/GN), 29-DK21 (OG/WH) and grounded through circuit 31-DK20B (BK/RD), 31-DK20A (BK/RD), 31-DK20B (BK/RD), 31-DK20C (BK/RD) and 31-DK20D (BK/RD).

Possible Causes
- CJB fuse 20 (10A)
- CJB fuse 30 (5A)
- circuit 29-DK20 (OG/GN) open or shorted to ground
- circuit 29S-DK22 (OG/WH) open or shorted to ground
- circuit 31-DK20 (BK/RD) open
- circuit 31-DK20A (BK/RD) open
- circuit 31-DK20B (BK/RD) open
- circuit 31-DK20C (BK/RD) open
- circuit 31-DK20D (BK/RD) open
- FEM

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