Inspection Procedure

Check voltage between terminals +B and GND of transponder key amplifier connector.
PREPARATION:
1. Turn the ignition switch OFF.
2. Disconnect the transponder key amplifier connector.
  
  Fig 1: Checking Voltage Between Transponder Key Amplifier Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK:

Measure the voltage between terminals +B and GND of the transponder key amplifier connector.

OK:

Voltage: 9 - 14 V

OK: Proceed to next circuit inspection shown in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).

NG: Go to next step.
Check EFI1 fuse.
PREPARATION:

Remove the EFI1 fuse from the FL block.

CHECK:

Check the continuity of the EFI1 fuse.

OK:

Continuity

Fig 2: Identifying EFI1 Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Check for short in all harness and components connected to EFI1 fuse.

OK: Go to next step.
Check harness and connector between transponder key amplifier and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
NG: Repair or replace harness or connector.

OK: Check and repair harness and connector between transponder key amplifier and battery (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).