Mitsubishi Electric 55624R(S)-MF Service Manual page 85

CHECKING THE CIRCUIT AND INDIVIDUAL COMPONENT
1. ETACS POWER-SUPPLY AND GROUND CIRCUITS
Battery
NOTE
989 models>
990 models>
Description of operation
The battery supplies a stabilized 5V power supply
to the electronic control unit, via the constant-
voltage circuit and terminal (36) directly connected
to the battery.
Electronic control unit terminal voltage (status of the electronic control unit connector)
ECU terminal No.
36 Electronic control unit
power supply
Checking the ground circuit (Disconnect the connector and check the wiring harness side.)
Terminal Connected
to/measured compo-
29 Electronic control unit
ground
30" Electronic control unit
ground
NOTE
LIGHTING SYSTEM - Troubleshooting
Main
fusible
link
Sub
fusible
Signal
At all times
Tester
connection
Resistance
Resistance
TSB Revision
<From 1991 models>
Battery
I-
+,
If there is. an abnormal condition of the power-
supply circuit, the other ETACS systems also will
not function.
Conditions
Check conditions
(Multi-purpose fuse)
or
storage
3 connector
control unit
(electronic
control unit)
voltage
Terminal
Battery positive
voltage
Standard
,
Continuity