Last Modified: 4-30-2014 6.6 U Doc ID: RM000001A5F002X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TERMINALS OF ECU; 2006 MY LX470 [05/2005 -        ]

TERMINALS OF ECU

1. CHECK SKID CONTROL ECU

(a) Measure the voltage and resistance of the connectors.

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

SA1 (A39-2) - GND (A39-6, 31, A40-8, 17)

G - W-B

Front RH ABS switching solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SA2 (A39-3) - GND (A39-6, 31, A40-8, 17)

B - W-B

Front LH ABS switching solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SA3 (A39-4) - GND (A39-6, 31, A40-8, 17)

G-W - W-B

Rear ABS switching solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

STR (A39-5) - GND (A39-6, 31, A40-8, 17)

G-Y - W-B

VSC switching solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SFLR (A39-7) - GND (A39-6, 31, A40-8, 17)

B-Y - -W-B

Front left decompression solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SRRH (A39-8) - GND (A39-6, 31, A40-8, 17)

W - W-B

Rear right holding solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SRRR (A39-9) - GND (A39-6, 31, A40-8, 17)

B-O - W-B

Rear right decompression solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

VCM (A39-10) - E2 (A39-12)

B - W

Master cylinder pressure sensor power source

Ignition switch ON

4.5 to 5.5 V

PH (A39-11) - GND (A39-6, 31, A40-8, 17)

O - W-B

Pressure switch (high) input

Ignition switch ON, pressure switch (PH) ON

Below 1 V

PH (A39-11) - GND (A39-6, 31, A40-8, 17)

O - W-B

Pressure switch (high) input

Ignition switch ON, pressure switch (PH) OFF

5 to 8 V

FR+ (A39-14) - FR- (A39-13)

L-P

Front right wheel speed sensor input

Ignition switch ON, slowly turn right front wheel

Pulse generation

FL+ (A39-16) - FL- (A39-15)

R-G

Front left wheel speed sensor input

Ignition switch ON, slowly turn left front wheel

Pulse generation

SR (A39-19) - R1+ (A39-1)

G-Y - P

Solenoid relay output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SFLH (A39-21) - GND (A39-6, 31, A40-8, 17)

Y - W-B

Front left holding solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

PMC (A39-22) - E2 (A39-12)

R-W

Master cylinder pressure sensor input

Ignition switch ON, stop light switch OFF

0.3 to 0.7 V

E2 (A39-12) - GND (A39-6, 31, A40-8, 17)

W - W-B

ACC pressure sensor ground

Ignition switch OFF

Below 1 Ω

MTT (A39-27) - GND (A39-6, 31, A40-8, 17)

B-R - W-B

Motor test input

Ignition switch ON (Motor relay is OFF)

Below 1.5 V

MT+ (A39-28) - MT- (A39-18)

L - GR

Motor relay input

Ignition switch ON

Below 1.5 V

MR1 (A39-29) - R1+ (A39-1)

R - P

Motor relay output 1

Ignition switch ON, hydraulic brake booster pump motor ON

10 to 14 V

WA (A40-1) - GND (A39-6, 31, A40-8, 17)

R-L - W-B

ABS warning light output

Ignition switch ON, ABS warning light OFF

Below 2.0 V

BZ (A40-2) - GND (A39-6, 31, A40-8, 17)

L - W-B

VSC buzzer output

Ignition switch ON, VSC buzzer is sounded

Below 1.5 V

D/G (A40-3) - GND (A39-6, 31, A40-8, 17)

V-W - W-B

Diagnostics tester communication line

Ignition switch ON

10 to 14 V

P (A40-5) - GND (A39-6, 31, A40-8, 17)

G-W - W-B

Shift position indicator "P" input

Ignition switch ON, shift lever is in P position

10 to 14 V

IG1 (A40-6) - GND (A39-6, 31, A40-8, 17)

B-W - W-B

IG1 power source

Ignition switch ON

10 to 14 V

STP (A40-10) - GND (A39-6, 31, A40-8, 17)

G-W - W-B

Stop light switch input

Stop light switch OFF

Below 1.5 V

STP (A40-10) - GND (A39-6, 31, A40-8, 17)

G-W - W-B

Stop light switch input

Stop light switch ON

10 to 14 V

TC (A40-11) - GND (A39-6, 31, A40-8, 17)

P-B - W-B

Terminal TC of DLC3

Ignition switch OFF

Below 1 V

TC (A40-11) - GND (A39-6, 31, A40-8, 17)

P-B - W-B

Terminal TC of DLC3

Ignition switch ON

10 to 14 V

TS (A40-12) - GND (A39-6, 31, A40-8, 17)

W - W-B

Terminal TS of DLC3

Ignition switch OFF

Below 1 V

TS (A40-12) - GND (A39-6, 31, A40-8, 17)

W - W-B

Terminal TS of DLC3

Ignition switch ON

10 to 14 V

PKB (A40-13) - GND (A39-6, 31, A40-8, 17)

R-W - W-B

Parking brake switch input

Ignition switch ON, parking brake switch ON

Below 1.5 V

PKB (A40-13) - GND (A39-6, 31, A40-8, 17)

R-W - W-B

Parking brake switch input

Ignition switch ON, parking brake switch OFF

10 to 14 V

ENG+ (A40-14) - ENG- (A40-22)

R - G

Translate ECU communication input

Ignition switch ON

Pulse generation

RL+ (A40-18) - RL- (A40-19)

R - G

Rear left wheel speed sensor input

Ignition switch ON, slowly turn left rear wheel

Pulse generation

RR+ (A40-20) - RR- (A40-21)

B - W

Rear right wheel speed sensor input

Ignition switch ON, slowly turn right rear wheel

Pulse generation

TRC+ (A40-24) - TRC- (A40-16)

Y - L

Translate ECU communication output

Ignition switch ON

Pulse generation

EXI2 (A41-2) - GND (A39-6, 31, A40-8, 17)

B-L - W-B

L4 switch input

Ignition switch ON, L4 switch ON

8 to 14 V

EXI2 (A41-2) - GND (A39-6, 31, A40-8, 17)

B-L - W-B

L4 switch input

Ignition switch ON, L4 switch OFF

Below 1.5 V

EXI (A41-3) - GND (A39-6, 31, A40-8, 17)

P-B - W-B

Center differential lock switch input

Ignition switch ON, differential lock switch ON

Below 1.5 V

EXI (A41-3) - GND (A39-6, 31, A40-8, 17)

P-B - W-B

Center differential lock switch input

Ignition switch ON, differential lock switch OFF

10 to 14 V

VSCW (A41-4) - GND (A39-6, 31, A40-8, 17)

L-W - W-B

VSC TRAC warning light output

Ignition switch ON, VSC TRAC warning light ON

Below 2.0 V

VSCW (A41-4) - GND (A39-6, 31, A40-8, 17)

L-W - W-B

VSC TRAC warning light output

Ignition switch ON, VSC TRAC warning light OFF

10 to 14 V

BRL (A41-5) - GND- (A39-6, 31, A40-8, 17)

Y-G - W-B

BRAKE warning light output

Ignition ON, BRAKE warning light ON

10 to 14 V

BRL (A41-5) - GND- (A39-6, 31, A40-8, 17)

Y-G - W-B

BRAKE warning light output

Ignition ON, BRAKE warning light OFF

Below 2.0 V

IND (A41-6) - GND- (A39-6, 31, A40-8, 17)

L-B - W-B

SLIP indicator light input

Ignition switch ON, SLIP indicator light ON

Below 2.0 V

IND (A41-6) - GND- (A39-6, 31, A40-8, 17)

L-B - W-B

SLIP indicator light input

Ignition switch ON, SLIP indicator light OFF

10 to 14 V

WT (A41-7) - GND (A39-6, 31, A40-8, 17)

L-R - W-B

VSC OFF indicator light input

Ignition switch ON, DSC OFF indicator light ON

Below 2.0 V

WT (A41-7) - GND (A39-6, 31, A40-8, 17)

L-R - W-B

VSC OFF indicator light input

Ignition switch ON, VSC OFF indicator light OFF

10 to 14 V

VYS (A41-9) - GYAW (A41-27)

B-R

Yaw rate sensor power supply

Ignition switch ON

4.5 to 5.5 V

GL2 (A41-10) - GYAW (A41-27)

Y - R

Decelerate sensor input2

Ignition switch ON, vehicle is on level surface

2.0 to 3.0 V

SS1+ (A41-14) - SS1- (A41-23)

W - G

Steering sensor (+) input

Engine idling, slowly turn steering wheel

Pulse generation

INFR (A41-15) - GND (A39-6, 31, A40-8, 17)

B-R - W-B

VSC TRAC indicator light input

Ignition switch ON, VSC TRAC indicator light ON

Below 1.5 V

INFR (A41-15) - GND (A39-6, 31, A40-8, 17)

B-R - W-B

VSC TRAC indicator light input

Ignition switch ON, VSC TRAC indicator light OFF

10 to 14 V

YD (A41-19) - GND (A39-6, 31, A40-8, 17)

L - W-B

Yaw rate signal diagnosis output

Approximately 1 sec. after ignition switch ON

4.5 to 5.3 V

GL1 (A41-22) - GYAW (A41-27)

G - R

Decelerate sensor input1

Ignition switch ON, vehicle is on level surface

2.0 to 3.0 V

FRO (A41-24) - GND (A39-6, 31, A40 -8, 17)

R-W - W-B

Front right wheel speed output

Vehicle driving at about 20 km/h (12 mph)

Pulse generation

FLO (A41-25) - GND (A39-6, 31, A40-8, 17)

R-Y - W-B

Front left wheel speed output

Vehicle driving at about 20 km/h (12 mph)

Pulse generation

GYAW (A41-27) - GND (A39-6, 31, A40-8, 17)

R - W-B

Yaw rate sensor ground

Ignition switch OFF

Below 1 Ω

YAW (A41-28) - GYAW (A41-27)

W - R

Yaw rate sensor input

Ignition switch ON, vehicle is in stationary condition

2 to 3 V

SRLR (A42-1) - GND (A39-6, 31, A40-8, 17)

R-G - W-B

Rear left decompression solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

MR2 (A42-2) - R2+ (A42-3)

Y-B - W-L

Motor relay output

Ignition switch ON, hydraulic brake booster pump motor stops

10 to 14 V

AFS+ (A42-5) - AFS- (A42-13)

LG-R - GR-B

VGRS communication signal

Ignition switch ON

Pulse generation

AST (A42-6) - GND (A39-6, 31, A40-8, 17)

R-Y - W-B

Solenoid relay test input

Ignition switch ON, ABS warning light OFF

10 to 14 V

SRLH (A42-7) - GND (A39-6, 31, A40-8, 17)

R-W - W-B

Rear left holding solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

SFRR (A42-8) - GND (A39-6, 31, A40-8, 17)

B-W - W-B

Front right decompression solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

PL (A42-9) - GND (A39-6, 31, A40-8, 17)

W - W-B

Pressure switch (Low) input

Ignition switch ON, pressure switch (PL) ON

3 to 5 V

PL (A42-9) - GND (A39-6, 31, A40-8, 17)

W - W-B

Pressure switch (Low) input

Ignition switch ON, pressure switch (PL) OFF

7 to 11 V

SFRH (A42-16) - GND (A39-6, 31, A40-8, 17)

LG - W-B

Front right holding solenoid output

Ignition switch ON, ABS warning light OFF

10 to 14 V

VSC+ (A42-17) - VSC- (A42-18)

V - Y-G

VGRS communication signal

Ignition switch ON

Pulse generation

TRIG (A42-20) - GND (A39-6, 31, A40-8, 17)

L-R - W-R

Steering sensor trigger output

Ignition switch ON, ABS warning light OFF

10 to 14 V

+BO (A42-21) - GND (A39-6, 31, A40-8, 17)

LG - W-B

Steering sensor power source

Ignition switch ON, ABS warning light OFF

10 to 14 V

IG2 (A42-22) - GND (A39-6, 31, A40-8, 17)

B-R - W-B

IG2 power source

Ignition switch ON

10 to 14 V

2. CHECK TRANSLATE ECU

(a) Measure the voltage of the connector.

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

IG1 (T39-1) - GND (T39-40)

B-W - W-B

IG1 power source

Ignition switch ON

10 to 14 V

CANH (T39-7) - CANL (T39-10)

R - W

Multiplex communication line

Ignition switch ON

Pulse generation

ENG+ (T39-14) - ENG-(T39-15)

R - G

ECM communication line

Ignition switch ON

Pulse generation

TRC+ (T39-16) - TRC- (T39-17)

Y - L

ECM communication line

Ignition switch ON

Pulse generation