Mitsubishi Galant (2004+). Manual - part 343
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-563
INSPECTION PROCEDURE N-8: Transmitter: ETACS-ECU does not receive any signal from the lock,
unlock, trunk or panic switch.
.
CIRCUIT OPERATION
The ETACS-ECU receives signal through its receiver
from the transmitter, and operates the keyless entry
system according to the signal.
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the keyless entry transmit-
ter does not work normally.
.
TROUBLESHOOTING HINTS
• The transmitter may be defective
• The ETACS-ECU may be defective
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Register the transmitter.
Register the transmitter. Refer to GROUP 42, Keyless Entry
System, On-vehicle Service, How to register secret code
.
Q: Can the transmitter be registered correctly?
YES : If the transmitter works normally, the input signal from
the transmitter should be normal.
NO : Go to Step 2.
STEP 2. Check the transmitter battery.
Measure the voltage of the transmitter battery.
• The value should be approximately 2.5 - 3.2 volts.
Q: Is the measured voltage approximately 2.5 - 3.2 volts
(battery positive voltage)?
YES : Go to Step 3.
NO : Replace the battery. If the transmitter can be
registered normally, and operates normally, it
indicates that the transmitter is sending normal signal
to the ECU.
AC002099AB
Reciver and Transmitter Communication Circuit
ACX01609