Inspection Procedure

WARNING: This page is about a different car, the 2002 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.

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

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.

OK = Voltage: 9-14V
1. OK: Proceed to next circuit inspection shown in Problem Symptoms .
2. NG: Go to next step.
Check EFI1 fuse.

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

PREPARATION:

Remove the EFI1 fuse from the FL block.

CHECK:

Check the continuity of the EFI1 fuse.

OK = Continuity
1. OK: Go to next step.
2. NG: Check for short in all harnesses and components connected to EFI1 fuse.
Check harness and connector between transponder key amplifier and body ground.
1. OK: Check and repair harness and connector between transponder key amplifier and battery.
2. NG: Repair or replace harness or connector.