Mitsubishi Electric 55624R(S)-MF Service Manual page 169

CHECKING THE CIRCUIT AND INDIVIDUAL PART
1 ETACS POWER-SUPPLY AND GROUND CIRCUITS
THEFT-ALARM SYSTEM
Description of operation
The battery supplies a stabilized 5V power supply to the ECU,
via the constant-voltage circuit and terminal @I (which is
directly connected to the battery).
ECU terminal voltage (Connection condition of the ECU
connector)
ECU
terminal No.
Checking the ground circuit (Disconnect the connector and
check at the wiring harness side)
ECU
No.
ECU
Condition
Signal
ECU power supply At all times Batterypositivevoltage
Connected
Tester
Measurement
component
ground
Terminal
voltage
Check
Standard
a l l times 1 Contn.uty 1