Yanmar 3TNV82A Troubleshooting Manual page 186

FAILURE DIAGNOSIS
Wiring Diagram
: Check points
EGR side coupler
(coupling face)
1 2
4 5
*For the E-ECU Pin Layout, see [E-ECU Pin Layout Diagram] (P.1-134).
1-184
Battery
Fuse
10A
3
6
EGR valve
2 4 1
6 3
Method and Procedure of Failure Diagnosis
＋ −
ECU
Main relay
5
E-ECU
E48
VB
E34
MAIN-RLY
Harness side coupler
(coupling face)
E01 E48 E21
E11 E48 E31
E01
STPM-D
E11
STPM-C
E21
STPM-B
E31
STPM-A
TNV DI Service Manual
017554-00E