Subaru 2009 IMPREZA Service Manual page 3410

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
R: DTC U1302 CAN-LS BUS OFF
DTC DETECTING CONDITION:
Communication with body integrated unit is not possible because of the following reasons.
• Open or power supply-output short, GND-output short occurs in both CAN line.
• Internal error in each control module
TROUBLE SYMPTOM:
Display error may occur in fuel gauge because the CAN communication is not transmitted (sending/receiv-
ing) normally.
WIRING DIAGRAM:
A:
i84
BODY INTEGRATED
UNIT
10 11 12 13 14 15 16 17 18 19 20
1 2 3 4
9 10 11 12
24 25 26 27 28 29
i85
1 2 3 4 5 6 7 8 9
A: i84
5 6 7 8
13 14 15 16 17 18 19 20 21 22 23
30 31 32 33 34 35
LAN(diag)-77
COMBINATION
METER
i10
WN
AUTO A/C
CONTROL
AUDIO
PANEL
i85
i88
i50
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
i88 i10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
LAN SYSTEM (DIAGNOSTICS)
ON : WITHOUT NAVIGATION SYSTEM
: WITH NAVIGATION SYSTEM
WN
ON
NAVIGATION
UNIT
i50
LAN00308