Inspection Procedure

1. Check that the mayday switch is not stuck by pressing the switch several times.
2. Check for DTC again (see DTC CHECK / CLEAR  ).

   OK: Current DTC 4-5 is not output. 

NG: Go to step 2 

OK: CLEAR HISTORIC DTC (See  DTC CHECK / CLEAR   ) 

1. Remove the map light for standard body (see REMOVAL ) or long body (see REMOVAL ).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   30 (SIG1) - 32 (GND3)	EMERGENCY button is pressed	305 to 313 Ω
   30 (SIG1) - 32 (GND3)	VOL+ button is pressed	812 to 831 Ω
   30 (SIG1) - 32 (GND3)	VOL- button is pressed	1811 to 1848 Ω

   Fig 1: Inspecting Map Light Assembly (Mayday Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE MAP LIGHT ASSEMBLY (MAYDAY SWITCH) THEN CLEAR HISTORIC DTC 

OK: REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION