Data List/Active Test

DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensor, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical/Mayday Gateway/Data List.

According to the display on the Techstream, read the "Data List".

Mayday Gateway

MAYDAY GATEWAY REFERRENCE CHART

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Lost Message from Vehicle Bus	Number of transmission buffer overrides (V BUS)/ 0 to 255	0	-
Lost Message from Mayday Bus	Number of transmission buffer overrides (mayday ECU)/ 0 to 255	0	-
Send Wait-Frame	Number of Wait-frame transmissions/ 0 to 255	0	-
Mayday ECU 1	ECU judgment/ WITH or WITHOUT	WITH	-
Mayday ECU 2	ECU judgment/ WITH or WITHOUT	WITHOUT	-
Mayday ECU 3	ECU judgment/ WITH or WITHOUT	WITHOUT	-
Mayday ECU 4	ECU judgment/ WITH or WITHOUT	WITHOUT	-
Wakeup from Vehicle Bus	Wakeup judgment (V BUS)/ YES or NO	YES	-
Wakeup from Mayday Bus	Wakeup judgment (mayday ECU)/ YES or NO	YES	-
Battery Voltage	Vehicle battery voltage 0 to 25.5 [V]	Displays present battery state	-
#DTC	Number of diagnosis codes	-	-