Electronic Controlled Automatic Transmission System Terminals Of Ecm

Transmission. Lexus Gs430, Gs300. Uzs190 Grs190
A960E Automatic Transmission. Lexus Gs430, Gs300. Uzs190 Grs190

  1. ECM

  1. Cowl Side J/B ECU (Multiplex network Body ECU)

Electronic Controlled Automatic Transmission System -- Terminals Of Ecm



ECM

Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of 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 "Symbols (Terminal No.)" 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.

Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
D (E7-9) - E1 (E7-7)
R-W - BR
D shift position switch signal
Engine switch on (IG) and shift lever D and S position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever except D and S position
Below 1 V
R (E7-8) - E1 (E7-7)
R - BR
R shift position switch signal
Engine switch on (IG) and shift lever R position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever except R position
Below 1 V
STP (A7-4) - E1 (E7-7)
G - BR
Stop light switch signal
Brake pedal is depressed
7.5 to 14 V
↑
↑
↑
Brake pedal is released
Below 1.5 V
SFTD (A7-19) - E1 (E7-7)
O - BR
Down shift switch signal
Engine switch on (IG) and shift lever S position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever "-" position (Down shift)
Below 1 V
SFTU (A7-30) - E1 (E7-7)
Y-R - BR
Up shift switch signal
Engine switch on (IG) and shift lever S position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever "+" position (Up shift)
Below 1 V
S (A7-9) - E1 (E7-7)
W-G - BR
S shift position switch signal
Engine switch on (IG) and shift lever S position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever except S position
Below 1 V
P (E7-6) - E1 (E7-7)
W - BR
Park position switch signal
Engine switch on (IG) and shift lever P position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever except P position
Below 1 V
N (E7-32) - E1 (E7-7)
G-R - BR
Neutral position switch signal
Engine switch on (IG) and shift lever N position
10 to 14 V
↑
↑
↑
Engine switch on (IG) and shift lever except N position
Below 1 V
STAR (E7-4) - E1 (E7-7)
L-Y - BR
Park neutral switch signal
Engine switch on (IG) and shift lever P and N position
Below 1 V
↑
↑
↑
Engine switch on (IG) and shift lever except P and N position
10 to 14 V
SLU+ (E7-13) - SLU- (E7-12)
L-Y - L-R
SLU solenoid signal
5th (lock-up) or 6th (lock-up) gear
Pulse generation
(See waveform 2)
SR (E7-2) - E1 (E7-7)
G-W - BR
SR solenoid signal
1st, 2nd, 3rd or 4th gear
10 to 14 V
↑
↑
↑
5th or 6th gear
Below 1 V
S4 (E7-16) - E1 (E7-7)
G-R - BR
S4 solenoid signal
5th or 6th gear
10 to 14 V
↑
↑
↑
1st, 2nd, 3rd or 4th gear
Below 1 V
S3 (E7-17) - E1 (E7-7)
G - BR
S3 solenoid signal
1st, 2nd or 3rd gear
10 to 14 V
↑
↑
↑
4th, 5th or 6th gear
Below 1 V
S2 (E7-18) - E1 (E7-7)
W - BR
S2 solenoid signal
1st, 2nd or 6th gear
10 to 14 V
↑
↑
↑
3rd, 4th or 5th gear
Below 1 V
S1 (E7-19) - E1 (E7-7)
R - BR
S1 solenoid signal
1st gear
Below 1 V
↑
↑
↑
Except 1st gear
10 to 14 V
SL2+ (E7-11) - SL2- (E7-10)
L-W - W
SL2 solenoid signal
Engine idle speed
Pulse generation
(See waveform 3)
SL1+ (E7-25) - SL1- (E7-24)
Y - L
SL1 solenoid signal
5th or 6th gear
Pulse generation
(See waveform 4)
SP2+ (E7-23) - SP2- (E7-22)
L - Y
Speed sensor (SP2) signal
Vehicle speed 20 km/h (12 mph)
Pulse generation
(See waveform 6)
NT+ (E7-21) - NT- (E7-20)
R - G
Speed sensor (NT) signal
Engine idle speed
Pulse generation
(See waveform 5)
SLT+ (E7-35) - SLT- (E7-34)
B - G-B
SLT solenoid signal
Engine idle speed
Pulse generation
(See waveform 1)
OIL (E7-27) - EOIL (E7-26)
G-Y - BR
ATF temperature sensor signal
ATF temperature: 115°C (239°F) or more
Below 1.5 V
KD (A6-26) - E1 (E7-7)
O - BR
Kick-down switch signal
Engine switch on (IG) and Accelerator pedal is depressed
Below 1 V
↑
↑
↑
Engine switch on (IG) and Accelerator pedal is released
10 to 14 V


    Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  1. Waveform 1

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


    2. Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  2. Waveform 2

    Reference:
    Terminal
    		SLU+ - SLU-
    Tool setting
    		5 V/DIV, 1ms/DIV
    Vehicle condition
    		5th (lock-up) or 6th (lock-up) gear


    3. Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  3. Waveform 3

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


    4. Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  4. Waveform 4

    Reference:
    Terminal
    		SL1+ - SL1-
    Tool setting
    		5 V/DIV, 1ms/DIV
    Vehicle condition
    		5th or 6th gear


    5. Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  5. Waveform 5

    Reference:
    Terminal
    		NT+ - NT-
    Tool setting
    		1 V/DIV, 2ms/DIV
    Vehicle condition
    		Engine idle speed (P or N position)


    6. Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

  6. Waveform 6

    Reference:
    Terminal
    		SP2+ - SP2-
    Tool setting
    		2 V/DIV, 20ms/DIV
    Vehicle condition
    		Vehicle speed 20 km/h (12 mph)

Cowl Side J/B ECU (Multiplex network Body ECU)

Lexus Gs430, Gs300. Uzs190 Grs190.A960E Automatic Transmission.Electronic Controlled Automatic Transmission System.Electronic Controlled Automatic Transmission System Terminals Of Ecm

HINT:
Each ECU terminal's standard voltage is shown in the table below.
In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" 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 ECU terminals.

Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
PWR (L68-18) - Body ground
P
PWR switch signal
Engine switch on (IG) and Pattern select switch (PWR) ON
0 to 1.5 V
↑
↑
↑
Engine switch on (IG) and Pattern select switch (PWR) OFF
Pulse generation
*1
SNOW (L68-17) - Body ground
L
SNOW switch signal
Engine switch on (IG) and Pattern select switch (SNOW) ON
0 to 1.5 V
↑
↑
↑
Engine switch on (IG) and Pattern select switch (SNOW) OFF
Pulse generation
*1
HINT:
*1: Voltage is input intermittently as this is an intermittent circuit. (Voltage varies between a peak of 7.5 to 14 V and a low of 0 to1.5 V.)