CHASSIS ELECTRICAL
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CHECKING THE CIRCUIT AND INDIVIDUAL PART
1. ETACS POWER-SUPPLY AND GROUND CIRCUITS
Description of operation
The battery supplies a stabilized 5 V power supply to the
ECU, via the constant-voltage circuit and terminal 51 (which
is directly connected to the battery).
ECU terminal voltage (Connection condition of the ECU con-
nector).
I
ECU
Signal Condition
Terminal
terminal No.
voltage
51
ECU power supply
At all times
12v
2. KEY-REMINDER SWITCH INPUT CIRCUIT
Description of operation
The key-reminder switch is switched OFF and HIGH-level
signals are sent to the ECU when the key is inserted into
the ignition key cylinder: when the key is removed, the key-re-
minder switch is switched ON and LOW-level signals are sent
to the ECU.
ECU terminal voltage (Connection condition of the ECU con-
nector).
I
ECU
Terminal
terminal No.
Signal
Condition
voltage
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L)
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Key-reminder
switch
Key removed
12 V
Key inserted 0 V
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