Without Scan Tool
DTC CHECK / CLEAR1. DTC CHECK
HINT: Turn the engine switch on (IG), wait 5 seconds, and then check the DTC.
a. Current DTC check
With the engine switch on (IG), press and hold the PTT button, and then press the VOL+ button 5 times with in 15 seconds.
b. Historic DTC check
With the engine switch on (IG), press and hold the PTT button, and then press the VOL- button 5 times with in 15 seconds.
c. Clear historic DTC
With the engine switch on (IG), press and hold the PTT button, and then press the door unlock switch of the power window regulator master switch 5 times with in 15 seconds.
2. LED BLINKING PATTERN
When the system is in the diagnosis mode, the red and green LEDs on the Mayday switch will blink in the applicable pattern. The blinking pattern given in the illustration is an example of DTC 3-2 and 4-3.
DTCs will be output in numerical order. A set of DTC blinking patterns will be output twice.
3. EXIT DIAGNOSIS MODE
Diagnostic mode can be exited by turning the engine switch off.
Part 1:
Part 2:
4. INFRASTRUCTURE TROUBLESHOOTING
HINT:
*1: If replacement of the ECU is necessary, replace the Mayday battery (backup battery) together with the ECU. After the replacement, register the ECU.
*2: Telephone antenna includes peripheral parts such as the telephone antenna (GPS antenna), telephone antenna base, antenna cord, etc.
*3: When running the vehicle, make sure it is in the LEXUS Link service area. If on a level surface, the vehicle may only need to be driven a short distance before a connection can be made. If in a mountainous area, the vehicle may have to be driven a long distance before the connection can be made.