DI−261
DIAGNOSTICS − ELECTRONIC MODULATED AIR SUSPENSION
DI1MW−06
TERMINALS OF ECU
A20 A21 A22
F10575
Symbols (Terminals No.) Wiring Color Condition STD Voltage (V)
FAR+ (A20 − 1) − FAR− (A20 −
O ↔ R−Y IG switch ON Continuity (Ω)
2)
FBR+ (A20 − 3) − FBR− (A20 −
R−G ↔ LG IG switch ON Continuity (Ω)
4)
SHFR (A20 − 6) − GND (A22 − IG switch ON 0.5 − 4.5
B−W ↔ W−B
22) Engine idling, height control switch ”NORM” Approx. 2.5
SHFL (A20 − 7) − GND (A22 − IG switch ON 0.5 − 4.5
L ↔ W−B
22) Engine idling, height control switch ”NORM” Approx. 2.5
SBR1 (A20 − 10) − GND (A22 −
V−R ↔ W−B IG switch ON 4.5 − 5.5
22)
SBL1 (A20 − 11) − GND (A22 −
LG−R ↔ W−B IG switch ON 4.5 − 5.5
22)
FAL+ (A20 − 12) − FAL− (A20 −
G−B ↔ G−R IG switch ON Continuity (Ω)
13)
IG switch ON Below 1
SLRL (A20 − 14) − GND (A22 −
P−L ↔ W−B Engine idling, height control switch from ”NORM” to ”HIGH” or
22) 8 or more
reverse
IG switch ON Below 1
SLRR (A20 − 15) − GND (A22 −
P ↔ W−B Engine idling, height control switch from ”NORM” to ”HIGH” or
22) 8 or more
reverse
HSW (A21 − 16) − GND (A22 − IG switch ON, height control switch ”NORM” position 10 − 14
LG−B ↔ W−B
22) IG switch ON, height control switch ”HIGH” position Below 1.5
SGL1 (A20 − 17) − GND (A22 −
LG−B ↔ W−B Always Continuity (Ω)
22)
SGR1 (A20 − 18) − GND (A22
R−L ↔ W−B Always Continuity (Ω)
− 22)
SGFL (A20 − 20) − GND (A22 − IG switch ON, keep the vehicle still without any vertical move-
P ↔ W−B Approx. 2.5
22) ment for 1 second
SGFR (A20 − 21) − GND (A22 IG switch ON, keep the vehicle still without any vertical move-
V ↔ W−B Approx. 2.5
− 22) ment for 1 second
RM+ (A20 − 22) − GND (A22 − Engine idling, height control switch from ”NORM” to ”HIGH”
BR−Y ↔ W−B Below 1
22) during compressor operation
RM− (A20 − 23) − GND (A22 −
BR−B ↔ W−B Always Continuity (Ω)
22)
L1 (A20 − 24) − GND (A22 − IG switch ON, accelerator pedal is released 10 − 14
GR−B ↔ W−B
22) IG switch ON, accelerator pedal is depressed 0 − 1.5
2001 LEXUS LS430 (RM812U)
Author: Date: 436
DI−262
DIAGNOSTICS − ELECTRONIC MODULATED AIR SUSPENSION
FBL+ (A20 − 26) − FBL− (A20 −
G−W ↔ G−O IG switch ON Continuity (Ω)
25)
CHS+ (A21 − 2) − GND (A22 −
L ↔ W−B IG switch ON Pulse generation
22)
SS2+ (A21 − 3) − GND (A22 −
R ↔ W−B IG switch ON, steering wheel is being turned slowly Repeat 1.5 − 3.5
22)
TACH (A21 − 4) − GND (A22 −
B−Y ↔ W−B Condition that the engine is running Below 1 − 12
22)
IG switch ON Below 1
RC (A21 − 5) − GND (A22 − 22) G−Y ↔ W−B Engine idling, height control switch from ”NORM” to ”HIGH”
8 or more
during compressor operation
SLEX (A21 − 6) − GND (A22 − IG switch ON Below 1
V−Y ↔ W−B
22) Engine idling, height control switch from ”HIGH” to ”NORM” 8 or more
IG switch ON Below 1
SLFR (A21 − 7) − GND (A22 −
BR−W ↔ W−B Engine idling, height control switch from ”NORM” to ”HIGH” or
22) 8 or more
reverse
IG switch ON Below 1
SLFL (A21 − 8) − GND (A22 −
R−W ↔ W−B Engine idling, height control switch from ”NORM” to ”HIGH” or
22) 8 or more
reverse
IG switch ON, disconnect between terminals OPB and CG of
TD (A21 − 9) − GND (A22 − 22) GR ↔ W−B 10 − 14
DLC3
CHS− (A21 − 10) − GND (A22 −
LG ↔ W−B IG switch ON Pulse generation
20)
SS2− (A21 − 11) − GND (A22 −
W ↔ W−B IG switch ON, steering wheel is being turned slowly Repeat 1.5 − 3.5
22)
FRO (A21 − 12) − GND (A22 −
V ↔ W−B Vehicle speed 12 mph (20 km/h) or higher Pulse generation
22)
VT (A21 − 13) − GND (A22 −
B−L ↔ W−B IG switch ON, absorber control switch ”SPORT” Below 1
22)
VH (A21 − 14) − GND (A22 −
LG−R ↔ W−B IG switch ON, height control switch ”HIGH” Below 1
22)
SW1 (A21 − 15) − GND (A22 − Engine idling, absorber control switch ”NORM” position 10 − 14
O ↔ W−B
22) Engine idling, absorber control switch ”SPORT” position 0 − 1.5
RBR+ (A22 − 1) − RBR− (A22 −
Y−B ↔ Y−G IG switch ON Continuity (Ω)
2)
RAL+ (A22 − 3) − RAL− (A22 −
L−O ↔ L−R IG switch ON Continuity (Ω)
4)
RBL+ (A22 − 5) − RBL− (A22 −
L−B ↔ L−Y IG switch ON Continuity (Ω)
6)
SBL2 (A22 − 7) − GND (A22 −
LG−R ↔ W−B IG switch ON 4.5 − 5.5
22)
SHRR (A22 − 8) − GND (A22 − IG switch ON 0.5 − 4.5
B−O ↔ W−B
22) Engine idling, height control switch ”NORM” Approx. 2.5
SHRL (A22 − 9) − GND (A22 − IG switch ON 0.5 − 4.5
W ↔ W−B
22) Engine idling, height control switch ”NORM” Approx. 2.5
SGR2 (A22 − 10) − GND (A22
BR−Y ↔ W−B Always Continuity (Ω)
− 22)
B (A22 − 11) − GND (A22 − 22) W−R ↔ W−B IG switch ON 10 − 14
2001 LEXUS LS430 (RM812U)
Author: Date: 437
DI−263
DIAGNOSTICS − ELECTRONIC MODULATED AIR SUSPENSION
RAR+ (A22 − 13) − RAR− (A22
Y ↔ Y−R IG switch ON Continuity (Ω)
− 12)
SBR3 (A22 − 17) − GND (A22 −
O ↔ W−B IG switch ON 4.5 − 5.5
22)
SBR2 (A22 − 18) − GND (A22 −
BR ↔ W−B IG switch ON 4.5 − 5.5
22)
SGRR (A22 − 19) − GND (A22 IG switch ON, keep the vehicle still without any vertical move-
BR−R ↔ W−B Approx. 2.5
− 22) ment for 1 second
SGR3 (A22 − 20) − GND (A22
BR−W ↔ W−B Always Continuity (Ω)
− 22)
SGL2 (A22 − 21) − GND (A22 −
LG−B ↔ W−B Always Continuity (Ω)
22)
GND (A22 − 22) − Body ground W−B ↔ Body Always Continuity (Ω)
2001 LEXUS LS430 (RM812U)
Author: Date: 438
