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Terminals Of Ecu

Fig 1: Identifying Terminals Of ECU
G03386907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
SYMBOLS CHART

Symbols (Terminal No.) Wiring color Condition STD voltage (V)
IG+ ES (C8-1 <=> C8 - 11) R - Y <=> BR Ignition switch OFF --> ON 0 V --> 10 - 14 V
MPX+ <=> ES (C8 - 2 <=> C8 - 11) Y <=> BR Multiplex communication circuit -
MPX- <=> ES (C8 - 3 <=> C8 - 11) L - O <=> BR Multiplex communication circuit -
S <=> ES (C8 - 4 <=> C8 - 11) B - Y <=> BR Engine running Pulse generation (*1)
CHK <=> ES (C8 - 5 <=> C8 - 11) R - B <=> BR Ignition switch ON and malfunction indicator light ON - OFF Below 1 V --> 10-14 V
A/B <=> ES (C8 - 7 <=> C8 - 11) R <=> BR Ignition switch ON and ODO/TRIP switch is pressed --> depressed Below 1 V --> 4.5 -5.5 V
RSET <=> ES (C8 - 8 <=> C8 - 11) P <=> BR Ignition switch ON and RSET switch is pressed --> depressed Below 1 V --> 4.5-5.5 V
PBLT <=> ES (C8 - 9 <=> C8 - 11) L-R <=> BR Ignition switch ON and passenger's seat belt warning unflash --> flash 10 - 14 V --> Below 1 V
SE <=> ES (C8 - 10 <=> C8 - 11) W-B <=> BR Constant Continuity
ES <=> Body ground (C8 - 11 <=> Body ground) BR <=> Body ground Constant Continuity
B <=> ES (C8 - 12 <=> C8 - 11) B <=> BR Constant 10 - 14 V
TURNL <=> ES (C8-13 <=> C8 - 11) G-B <=> BR Ignition switch ON and left turn indicator light OFF --> ON Below 1 V --> Below 1 V <=> 10 - 14 V
TURN R <=> ES (C8 - 14 <=> C8 - 11) G-Y <=> BR Ignition switch ON and right turn indicator light OFF --> ON Below 1 V --> Below 1 V <=> 10 - 14 V
ILL- <=> ES (C8 - 16 <=> C8 - 11) W-L <=> BR Ignition switch ON Pulse generation (*1)
SI <=> ES (C8 - 18 <=> C8 - 11) V <=> BR Ignition switch ON and turn rear wheel slowly Pulse generation (*1)
+S <=> ES (C8 - 19 <=> C8 - 11) W-R <=> BR Ignition switch ON and turn rear wheel slowly Pulse generation (*1)
FR <=> ES (C8 - 20 <=> C8 - 11) Y-R <=> BR Ignition switch ON and fuel level FULL --> EMPTY 0.5 V --> 5.5 V
FE <=> ES (C8 - 21 <=> C8 - 11) Y-G <=> BR Constant Continuity
SYMBOLS CHART

Symbols (Terminal No.) Wiring color Condition STD voltage (V)
+F <=> Body ground (1) (C9 - 1 <=> Body ground) Y <=> Body ground Ignition switch ON Pulse generation (2)
E <=> Body ground (1) (C9 - 2 <=> Body ground) BR <=> Body ground Constant Continuity
YSSR <=> Body ground (1) (C9 - 3 <=> Body ground) R <=> Body ground Compass circuit - (3)
COMN <=> Body ground (1) (C9 - 3 <=> Body ground) L <=> Body ground Ignition switch ON Approx. 2.5 V (4)
XSSR <=> Body ground (1) (C9 - 5 <=> Body ground) W <=> Body ground Compass circuit - (3)
CMP1 <=> Body ground (1) (C9 - 7 <=> Body ground) Shielded <=> Body ground Constant Continuity
(1) USA Only
(2) Reference: Using oscilloscope:
(3) The voltage values differ due to magnetization of the direction sensor, earth magnetism of the place of measurement, etc.
(4) If the CPU wakes up by communication, approx. 2.5 V will be output even in +B condition.
OSICILLOSCOPE CHART

Item Contents
Tool setting 10 V / DIV,20 ms / DV
Vehicle condition Engine idle speed
Fig 2: Using Osicilloscope
G03386908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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