Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check if trouble occurs in the service area or outside service area.
CHECK:

Check if trouble occurs in the service area or outside service area.

RESULT:
1. A: Trouble occurs in the service area.
2. B: Trouble occurs in the outside service area.
1. B : Check and operate again in the service area.
2. A : Go To Next Step
Check transceiver.
CHECK:

Check that the malfunction disappears when a good transceiver is installed.

RESULT:
1. A: Malfunction does not disappear.
2. B: Malfunction disappears.
1. B : Replace transceiver.
2. A : Go To Next Step
Check telephone antenna.
Check that malfunction disappears when a new antenna and telephone antenna cable are installed.

RESULT:
1. A: Malfunction does not disappear.
2. B: Malfunction disappears.
1. B : Repair or replace telephone antenna cable or antenna
2. A : Go To Next Step
Check for open and short circuit in harness and connector between transceiver and telephone ECU (Mayday ECU) (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace harness or connector.
2. OK : Check and replace telephone ECU (Mayday ECU) (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).