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1
3
2
G19
3
2
4
1
TERMINAL
G19-1
Ground
Data link connector
G19-2
(Serial data terminal)
G19-3
Ignition signal
G19-4
Power source
Inspection of ECM, Immobilizer Control Mod-
ule and Its Circuit
ECM, Immobilizer Control Module and its circuit can be checked
at ECM wiring couplers and Immobilizer Control Module wiring
coupler by measuring voltage. Described here is only inspection
of Immobilizer Control Module. For inspection of ECM, refer to
"ENGINE AND EMISSION CONTROL INPUT/OUTPUT TABLE"
in Section 6E1.
CAUTION:
Immobilizer Control Module cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter
to Immobilizer Control Module with coupler disconnected
from it.
Voltage Check
1) Remove Immobilizer Control Module from steering lock
assembly with ignition switch OFF, referring to "Removal" of
"Immobilizer Control Module Removal and Installation" in
this section.
2) Connect Immobilizer Control Module coupler to Immobilizer
Control Module.
3) Check voltage at each terminal of coupler connected.
NOTE:
As each terminal voltage is affected by the battery volt-
age, confirm that it is 11V or more when ignition switch is
ON.
1. Immobilizer Control Module
2. Immobilizer Control Module coupler
3. Body ground
CIRCUIT
NOMAL VOLTAGE
IMMOBILIZER CONTROL SYSTEM 8G-19
–
4 – 5 V
Ignition switch ON
10 – 14 V
Ignition switch ON
0 – 1 V
Ignition switch OFF
10 – 14 V
Ignition switch ON
CONDITION
–
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