Terminals Of Ecu

CHECK TRANSMISSION CONTROL ECU

HINT:

Inspect the connectors from the back side while the connector is connected.

Fig 1: Identifying ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECU CONNECTOR TERMINAL REFERENCE

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
+B (T4-1) - E1 (T4-15)	L - W-B	Power source	Power switch ON (IG)	9 to 14 V
E02 (T4-2) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
E01 (T4-3) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
RZ1 (T4-4) - E2 (T4-16)	L - P	Rotation angle sensor signal	Power switch ON (IG)	4 to 5.5 V
RB (T4-5) - E2 (T4-16)	GR - P	Rotation angle sensor signal	Power switch ON (IG)	4 to 5.5 V
RA (T4-6) - E2 (T4-16)	LG - P	Rotation angle sensor signal	Power switch ON (IG)	4 to 5.5 V
PCON (T4-7) - E1 (T4-15)	LG - W-B	Communication bus	Power switch ON (IG)	Pulse generation (see wave form 1)
PPOS (T4-8) - E1 (T4-15)	W - W-B	Communication bus	Power switch ON (IG)	Pulse generation (see wave form 2)
IND (T4-9) - E1 (T4-15)	R - W-B	P position switch indicator light	P position switch ON	Below 1 V
MWA (T4-10) - E1 (T4-15)	W - W-B	Parking lock motor	Power switch ON (IG)	9 to 14 V
MVA (T4-11) - E1 (T4-15)	R - W-B	Parking lock motor	Power switch ON (IG)	9 to 14 V
MUA (T4-12) - E1 (T4-15)	B - W-B	Parking lock motor	Power switch ON (IG)	9 to 14 V
BATT (T4-13) - E1 (T4-15)	L - W-B	Power source (RAM)	Always	9 to 14 V
BMA (T4-14) - E1 (T4-15)	B - W-B P	CON relay	Power switch ON (IG)	9 to 14 V
E1 (T4-15) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
E2 (T4-16) - Body ground	P - Body ground	Ground	Always	Below 1 V
VC (T4-17) - E2 (T4-16)	O - P	Power source (Rotation angle sensor)	Power switch ON (IG)	4 to 5.5 V
MPX2 (T4-18) - E1 (T4-15)	B - W-B	Multiplex communication	Power switch OFF Power switch ON (IG)	Below 1 V Pulse generation
MPX1 (T4-19) - E1 (T4-15)	GR - W-B	Multiplex communication	Power switch OFF Power switch ON (IG)	Below 1 V Pulse generation
SIL (T4-20) - E1 (T4-15)	W - W-B	Diagnosis tester communication	Power switch ON (IG)	8 V or higher

Using an oscilloscope, check the waveform 1.

Waveform 1 (Reference)

WAVEFORM 1 REFERENCE

Item	Content
Symbols (Terminal No.)	P CON (T4-7) - E1 (T4-15)
Tool setting	5 V/DIV., 20 msec./DIV.
Condition	Power switch ON (IG)

Fig 2: Oscilloscope Waveform 1 Graph

Using an oscilloscope, check the waveform 2.

Waveform 2 (Reference)

WAVEFORM 2 REFERENCE

Item	Content
Symbols (Terminal No.)	PPOS (T4-8) - E1 (T4-15)
Tool setting	5 V/DIV., 20 msec./DIV.
Condition	Power switch ON (IG)

Fig 3: Oscilloscope Waveform 2 Graph