U250E Automatic Transmission Transaxle. Automatic Transaxle System Terminals Of Ecm

Drivetrain. Corolla. Zre142 Aze141

U250E Automatic Transmission Transaxle. Corolla. Zre142 Aze141

Automatic Transaxle System -- Terminals Of Ecm

ECM

HINT:

Each ECM terminal's standard voltage is shown in the table below.

In the table, first follow the information under "Condition". Look under "Terminal No. (Symbols)" for the terminals to inspected. The standard voltage between the terminals is shown under "Specific Condition".

Use the illustration above as a reference for the ECM terminals.

Terminals No. (Symbols)	Terminal Description	Condition	Specified Condition
B31-56 (D) - B31-104 (E1)	D shift position switch signal	Ignition switch ON and shift lever D and S position	11 to 14 V
B31-56 (D) - B31-104 (E1)	D shift position switch signal	Ignition switch ON and shift lever except D and S position	Below 1 V
B31-53 (R) - B31-104 (E1)	R shift position switch signal	Ignition switch ON and shift lever R position	11 to 14 V
B31-53 (R) - B31-104 (E1)	R shift position switch signal	Ignition switch ON and shift lever except R position	Below 1 V
A50-8 (SPD) - B31-104 (E1)	Speed signal	Vehicle speed 20 km/h (12mph)	Pulse generation (See waveform 8)
A50-36 (STP) - B31-104 (E1)	Stop light switch signal	Brake pedal is depressed	7.5 to 14 V
A50-36 (STP) - B31-104 (E1)	Stop light switch signal	Brake pedal is released	Below 1.5 V
A50-51 (SFTD) - B31-104 (E1)	Down shift switch signal	Ignition switch ON and shift lever S position	11 to 14 V
A50-51 (SFTD) - B31-104 (E1)	Down shift switch signal	Ignition switch ON and shift lever "-" position (Down shift)	Below 1 V
A50-16 (SFTU) - B31-104 (E1)	Up shift switch signal	Ignition switch ON and shift lever S position	11 to 14 V
A50-16 (SFTU) - B31-104 (E1)	Up shift switch signal	Ignition switch ON and shift lever "+" position (Up shift)	Below 1 V
B31-74 (S) - B31-104 (E1)	S shift position switch signal	Ignition switch ON and shift lever S position	11 to 14 V
B31-74 (S) - B31-104 (E1)	S shift position switch signal	Ignition switch ON and shift lever except S position	Below 1 V
B31-73 (P) - B31-104 (E1)	Park position switch signal	Ignition switch ON and shift lever P position	11 to 14 V
B31-73 (P) - B31-104 (E1)	Park position switch signal	Ignition switch ON and shift lever except P position	Below 1 V
B31-54 (N) - B31-104 (E1)	Neutral position switch signal	Ignition switch ON and shift lever N position	11 to 14 V
B31-54 (N) - B31-104 (E1)	Neutral position switch signal	Ignition switch ON and shift lever except N position	Below 1 V
B31-52 (NSW) - B31-104 (E1)	Park neutral switch signal	Ignition switch ON and shift lever P and N position	Below 2 V
B31-52 (NSW) - B31-104 (E1)	Park neutral switch signal	Ignition switch ON and shift lever except P and N position	11 to 14 V
B31-79 (DSL) - B31-104 (E1)	DSL solenoid signal	Vehicle speed 65 km/h (40mph), lock-up (ON to OFF)	Pulse generation (See waveform 2)
B31-80 (SR) - B31-104 (E1)	SR solenoid signal	Ignition switch ON	Below 1 V
		3rd, 4th or 5th gear	11 to 14 V
		1st or 2nd gear	Below 1 V
B31-78 (S4) - B31-104 (E1)	S4 solenoid signal	Ignition switch ON	Below 1 V
		5th gear	11 to 14 V
		Except 5th gear	Below 1 V
B31-60 (SL3+) - B31-61 (SL3-)	SL3 solenoid signal	Engine idle speed	Pulse generation (See waveform 3)
B31-58 (SL2+) - B31-59 (SL2-)	SL2 solenoid signal	Engine idle speed	Pulse generation (See waveform 4)
B31-57 (SL1+) - B31-77 (SL1-)	SL1 solenoid signal	Engine idle speed	Pulse generation (See waveform 5)
B31-101 (NC+) - B31-102 (NC-)	Speed sensor (NC) signal	Vehicle speed 30 km/h (19mph): (3rd gear) Engine speed 1,400 rpm	Pulse generation (See waveform 6)
B31-125 (NT+) - B31-124 (NT-)	Speed sensor (NT) signal	Vehicle speed 20 km/h (12mph)	Pulse generation (See waveform 7)
B31-76 (SLT+) - B31-75 (SLT-)	SLT solenoid signal	Engine idle speed	Pulse generation (See waveform 1)
B31-72 (THO1) - B31-95 (ETHO)	ATF temperature sensor signal	ATF temperature: 115°C (239°F) or more	Below 1.5 V

Waveform 1
Reference:
Terminal
SLT+ - SLT-
Tool setting
5 V/DIV, 1ms/DIV
Vehicle condition
Engine idle speed

Waveform 2
Reference:
Terminal
DSL - E1
Tool setting
10 V/DIV, 100ms/DIV
Vehicle condition
Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)

Waveform 3
Reference:
Terminal
SL3+ - SL3-
Tool setting
5 V/DIV, 1ms/DIV
Vehicle condition
Engine idle speed

Waveform 4
Reference:
Terminal
SL2+ - SL2-
Tool setting
5 V/DIV, 1ms/DIV
Vehicle condition
Engine idle speed

Waveform 5
Reference:
Terminal
SL1+ - SL1-
Tool setting
5 V/DIV, 1ms/DIV
Vehicle condition
Engine idle speed

Waveform 6
Reference:
Terminal
NC+ - NC-
Tool setting
1 V/DIV, 1ms/DIV
Vehicle condition
Vehicle speed 30 km/h (19 mph): (3rd gear)
Engine speed 1.400 rpm

Waveform 7
Reference:
Terminal
NT+ - NT-
Tool setting
5 V/DIV, 0.5ms/DIV
Vehicle condition
Vehicle speed 20 km/h (12 mph)

Waveform 8
Reference:
Terminal
SPD - E1
Tool setting
5 V/DIV, 20ms/DIV
Vehicle condition
Vehicle speed 20 km/h (12 mph)
HINT:
Depending on the vehicle, the output waveform voltage, influenced by optionally installed systems, may become 5V.

Terminal	SLT+ - SLT-
Tool setting	5 V/DIV, 1ms/DIV
Vehicle condition	Engine idle speed

Terminal	DSL - E1
Tool setting	10 V/DIV, 100ms/DIV
Vehicle condition	Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)

Terminal	SL3+ - SL3-
Tool setting	5 V/DIV, 1ms/DIV
Vehicle condition	Engine idle speed

Terminal	SL2+ - SL2-
Tool setting	5 V/DIV, 1ms/DIV
Vehicle condition	Engine idle speed

Terminal	SL1+ - SL1-
Tool setting	5 V/DIV, 1ms/DIV
Vehicle condition	Engine idle speed

Terminal	NC+ - NC-
Tool setting	1 V/DIV, 1ms/DIV
Vehicle condition	Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1.400 rpm

Terminal	NT+ - NT-
Tool setting	5 V/DIV, 0.5ms/DIV
Vehicle condition	Vehicle speed 20 km/h (12 mph)

Terminal	SPD - E1
Tool setting	5 V/DIV, 20ms/DIV
Vehicle condition	Vehicle speed 20 km/h (12 mph)