Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

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.
CHECK:

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

Fig 1: Measuring Voltage At Transponder Key Amplifier
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:
1. Voltage: 9 - 14 V
1. OK : Proceed to next circuit inspection shown in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG : Go to Next Step
Check EFI1 fuse.
PREPARATION:

Remove the EFI1 fuse from the FL block.

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

CHECK:

Check the continuity of the EFI1 fuse.

OK:
1. Continuity
1. NG : Check for short in all harness and components connected to EFI1 fuse.
2. OK : Go to Next Step
Check harness and connector between transponder key amplifier and body ground (See PROCEDURE ).
1. NG : Repair or replace harness or connector.
2. OK : Check and repair harness and connector between transponder key amplifier and battery (See PROCEDURE ).