NOTE
Be sure the battery is fully charged.
Do not disconnect the connectors.

Special Tool - Needle Adapter Set: 57001-1457
Amplifier Input Voltage Connections to Amplifier Connector: Digital Meter (+) → BR/W lead Digital Meter (–) → BK/Y lead
If the reading is out of the standard, check the wiring (see Immobilizer System Circuit).
If the reading is within the standard, check the wiring to ECU (see Immobilizer System Circuit)
If the wiring is good, replace the amplifier (see Immobilizer System Parts Replacement in the Electrical System chapter).
The transponder [A] in the ignition key is malfunction.
When the spare key of unregistration is used.
When the ignition key is registered in the registered ECU.

Antenna Resistance Inspection
Blank Key Detection (Service Code 36, Equipped Models)Cylinder Head Removal
Remove:
Thermostat Housing (see Thermostat Removal in the
Cooling System chapter)
Exhaust Pipe (see Exhaust Pipe Removal)
Camshafts (see Camshaft Removal)
Heat Insulation Plate [A] (see Engine Removal in the
Engine Removal/Installation chapter)
Place a container under the coolant dr ...
Exhaust Butterfly Valve Actuator Resistance Inspection
Turn the ignition switch to OFF.
Disconnect the exhaust butterfly valve actuator lead connector
(2 pins connector) [A].
Set the hand tester to the × 1 Ω range and connect it to
the exhaust butterfly valve actuator connector.
Special Tool - Hand Tester: 57001-1394
Measure ...
Stick Coil Primary Peak Voltage Inspection
NOTE
Be sure the battery is fully charged.
Remove the stick coils (see Stick Coil Removal).
Do not remove the spark plugs.
Connect the ECU to the harness.
Measure the primary peak voltage as follows.
Install the new spark plug [A] into each stick coil [B], and
ground them onto ...