Inspection Procedure
- CHECK HARNESS AND CONNECTOR (MAYDAY ECU - MAP LIGHT (MAYDAY SWITCH))
- Disconnect the R23 ECU connector.
- Disconnect the X4 map light connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition R23-13 (SIG2) - X4-31 (SIG2) Always Below 1 Ω R23-12 (SIG-) - X4-32 (GND3) Always Below 1 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR THEN CLEAR HISTORIC DTC
OK: Go to Next Step
- INSPECT MAP LIGHT ASSEMBLY (MAYDAY SWITCH)
- Remove the map light for standard body (see REMOVAL ) or long body (see REMOVAL ).
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition 31 (SIG2) - 32 (GND3) SERVICES button is pressed 305 to 313 Ω 31 (SIG2) - 32 (GND3) PHONE button is pressed 812 to 831 Ω 31 (SIG2) - 32 (GND3) PTT button is pressed 1811 to 1848 Ω 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