Home › Drivetrain › Automatic Transmission/Transaxle › AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM
Last Modified: 11-27-2007 1.6 U
Service Category: Drivetrain Section: Automatic Transmission/Transaxle
Model Year: 2008 Model: LX570 Doc ID: RM000000W74075X
Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: TERMINALS OF ECM (2008 LX570)

TERMINALS OF ECM

1. CHECK ECM



HINT:

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

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

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A38-21 (L4) - C53-81 (E1)

BR-R - W-B

Transfer L4 position signal
  • Engine switch on (IG)
  • Transfer position switch on L4

Below 1.5 V

A38-21 (L4) - C53-81 (E1)

BR-R - W-B

Transfer L4 position signal
  • Engine switch on (IG)
  • Transfer position switch not on L4

11 to 14 V

A38-5 (TFN) - C53-81 (E1)

G - W-B

Transfer neutral position signal
  • Engine switch on (IG)
  • Transfer position in neutral

Below 1.5 V

A38-5 (TFN) - C53-81 (E1)

G - W-B

Transfer neutral position signal
  • Engine switch on (IG)
  • Transfer position not in neutral

11 to 14 V

C53-120 (NSW) - C53-81 (E1)

L - W-B

PNP switch signal
  • Engine switch on (IG)
  • Shift lever in P or N

Below 1 V

C53-120 (NSW) - C53-81 (E1)

L - W-B

PNP switch signal
  • Engine switch on (IG)
  • Shift lever not in P or N

11 to 14 V

C53-2 (P) - C53-81 (E1)

G-B - W-B

P shift position switch signal
  • Engine switch on (IG)
  • Shift lever in P

11 to 14 V

C53-2 (P) - C53-81 (E1)

G-B - W-B

P shift position switch signal
  • Engine switch on (IG)
  • Shift lever not in P

Below 1 V

C53-26 (R) - C53-81 (E1)

L-R - W-B

R shift position switch signal
  • Engine switch on (IG)
  • Shift lever in R

11 to 14 V

C53-26 (R) - C53-81 (E1)

L-R - W-B

R shift position switch signal
  • Engine switch on (IG)
  • Shift lever not in R

Below 1 V

C53-25 (N) - C53-81 (E1)

G-W - W-B

N shift position switch signal
  • Engine switch on (IG)
  • Shift lever in N

11 to 14 V

C53-25 (N) - C53-81 (E1)

G-W - W-B

N shift position switch signal
  • Engine switch on (IG)
  • Shift lever not in N

Below 1 V

C53-27 (D) - C53-81 (E1)

G - W-B

D shift position switch signal
  • Engine switch on (IG)
  • Shift lever in D

11 to 14 V

C53-27 (D) - C53-81 (E1)

G - W-B

D shift position switch signal
  • Engine switch on (IG)
  • Shift lever not in D

Below 1 V

A38-25 (S) - C53-81 (E1)

W - W-B

S shift position switch signal
  • Engine switch on (IG)
  • Shift lever in S

11 to 14 V

A38-25 (S) - C53-81 (E1)

W - W-B

S shift position switch signal
  • Engine switch on (IG)
  • Shift lever not in S

Below 1 V

A38-38 (SFTU) - C53-81 (E1)

Y - W-B

Up-shift position switch signal
  • Engine switch on (IG)
  • Shift lever in S

11 to 14 V

A38-38 (SFTU) - C53-81 (E1)

Y - W-B

Up-shift position switch signal
  • Engine switch on (IG)
  • Shift lever "+" position (up-shift)

Below 1 V

A38-27 (SFTD) - C53-81 (E1)

L - W-B

Down-shift position switch signal
  • Engine switch on (IG)
  • Shift lever in S

11 to 14 V

A38-27 (SFTD) - C53-81 (E1)

L - W-B

Down-shift position switch signal
  • Engine switch on (IG)
  • Shift lever "-" position (down-shift)

Below 1 V

A38-36 (STP) - C53-81 (E1)

R - W-B

Stop light switch signal

Brake pedal depressed

11 to 14 V

A38-36 (STP) - C53-81 (E1)

R - W-B

Stop light switch signal

Brake pedal released

Below 1.5 V

C53-7 (S1) - C53-81 (E1)

R - W-B

Shift solenoid valve S1 signal

1st gear

Below 1 V

C53-7 (S1) - C53-81 (E1)

R - W-B

Shift solenoid valve S1 signal

Not in 1st gear

11 to 14 V

C53-6 (S2) - C53-81 (E1)

W - W-B

Shift solenoid valve S2 signal

1st, 2nd or 6th gear

11 to 14 V

C53-6 (S2) - C53-81 (E1)

W - W-B

Shift solenoid valve S2 signal

3rd, 4th or 5th gear

Below 1 V

C53-3 (S3) - C53-81 (E1)

B-R - W-B

Shift solenoid valve S3 signal

1st, 2nd or 3rd gear

11 to 14 V

C53-3 (S3) - C53-81 (E1)

B-R - W-B

Shift solenoid valve S3 signal

4th, 5th or 6th gear

Below 1 V

C53-5 (S4) - C53-81 (E1)

G-R - W-B

Shift solenoid valve S4 signal

5th or 6th gear

11 to 14 V

C53-5 (S4) - C53-81 (E1)

G-R - W-B

Shift solenoid valve S4 signal

1st, 2nd, 3rd or 4th gear

Below 1 V

C53-4 (SR) - C53-81 (E1)

G - W-B

Shift solenoid valve SR signal

1st, 2nd, 3rd or 4th gear

11 to 14 V

C53-4 (SR) - C53-81 (E1)

G - W-B

Shift solenoid valve SR signal

5th or 6th gear

Below 1 V

C53-14 (SL1+) - C53-15 (SL1-)

Y - L

Shift solenoid valve SL1 signal

5th or 6th gear

Pulse generation

(see waveform 1)

C53-12 (SL2+) - C53-13 (SL2-)

G-R - L-W

Shift solenoid valve SL2 signal

Engine idling

Pulse generation

(see waveform 2)

C53-9 (SLT+) - C53-8 (SLT-)

B - G-B

Shift solenoid valve SLT signal

Engine idling

Pulse generation

(see waveform 3)

C53-10 (SLU+) - C53-11 (SLU-)

L-Y - L-R

Shift solenoid valve SLU signal

5th (lock-up) gear or 6th (lock-up) gear

Pulse generation

(see waveform 4)

C53-122 (THO1) - C53-98 (ETHA)

G-Y - BR

No. 1 ATF temperature sensor signal

No. 1 ATF temperature: 115°C (239°F) or higher

Below 1.5 V

C53-99 (THO2) - C53-98 (ETHA)

L - BR

No. 2 ATF temperature sensor signal

No. 2 ATF temperature: 115°C (239°F) or higher

Below 1.5 V

C53-101 (SP2+) - C53-100 (SP2-)

Y - B

Speed sensor SP2 signal

Vehicle speed 20 km/h (12 mph)

Pulse generation

(see waveform 5)

C53-124 (NT+) - C53-123 (NT-)

Y - B

Speed sensor NT signal

Engine idling

(shift lever in P or N)

Pulse generation

(see waveform 6)

A38-10 (CANH) - C53-81 (E1)

P - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

(see waveform 7)

A38-11 (CANL) - C53-81 (E1)

B - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

(see waveform 8)

A38-51 (PWR) - C53-81 (E1)

L-B - W-B

Pattern select switch (PWR) signal
  • Engine switch on (IG)
  • Pattern select switch (PWR) off

11 to 14 V

A38-51 (PWR) - C53-81 (E1)

L-B - W-B

Pattern select switch (PWR) signal
  • Engine switch on (IG)
  • Pattern select switch (PWR) on

Below 1.5 V

A38-4 (SNWI) - C53-81 (E1)

R - W-B

Pattern select switch (2ND) signal
  • Engine switch on (IG)
  • Pattern select switch (2ND) off

11 to 14 V

A38-4 (SNWI) - C53-81 (E1)

R - W-B

Pattern select switch (2ND) signal
  • Engine switch on (IG)
  • Pattern select switch (2ND) pressed and held

Below 1.5 V

(a) Using an oscilloscope, check waveform 1.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-14 (SL1+) - C53-15 (SL1-)

5 V/DIV., 1 msec./DIV.

Engine idling

(b) Using an oscilloscope, check waveform 2.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-12 (SL2+) - C53-13 (SL2-)

5 V/DIV., 1 msec./DIV.

Engine idling

(c) Using an oscilloscope, check waveform 3.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-9 (SLT+) - C53-8 (SLT-)

5 V/DIV., 1 msec./DIV.

Engine idling

(d) Using an oscilloscope, check waveform 4.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-10 (SLU+) - C53-11 (SLU-)

5 V/DIV., 1 msec./DIV.

5th (lock-up)

(e) Using an oscilloscope, check waveform 5.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-101 (SP2+) - C53-100 (SP2-)

2 V/DIV., 2 msec./DIV.

Vehicle speed 20 km/h (12 mph)

(f) Using an oscilloscope, check waveform 6.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

C53-124 (NT+) - C53-123 (NT-)

1 V/DIV., 2 msec./DIV.

Engine idling (shift lever in P or N)

(g) Using an oscilloscope, check waveform 7.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

A38-10 (CANH) - C53-81 (E1)

1 V/DIV., 10 μsec./DIV.

Engine switch on (IG)

(h) Using an oscilloscope, check waveform 8.

Reference:

Terminal No. (Symbol)

Tool Setting

Condition

A38-11 (CANL) - C53-81 (E1)

1 V/DIV., 10 μsec./DIV.

Engine switch on (IG)