2003 LEXUS LS430 sensor

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Page 214 of 4500

LEXUS LS430 2003  Factory Repair Manual The hand-held tester can be used in steps 3, 6, 7 and 11.
1.VEHICLE BROUGHT TO WORK SHOP  
2.(SEE CUSTOMER PROBLEM ANALYSIS CHECK
 ) 
a. Confirm problem symptoms.  
3.CHECK AND CLEAR THE DTCS (SEE DTC

Page 226 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 21: Display Code - Conditions Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
1.DATA LIST 
HINT: 
From the DATA LIST displayed on the hand-held tester, you can read the values of the display

Page 227 of 4500

LEXUS LS430 2003  Factory Repair Manual ROOM TEMP
Room temperature sensor / min.: -
6.5°C (20.3°F) max.: 57.25°C 
(126.95°F)
Actual room temperature is displayed-
AMBI TEMP 
SENSAmbient temperature sensor / 
min.: -23.3°C (-9.94°F) ma

Page 228 of 4500

LEXUS LS430 2003  Factory Repair Manual AIR MIX STEP-
DAir mix servomotor target STEP 
(Driver side) / min.: 257 STEP 
max.: 1571 STEPMAX COOL: Approx. 257 STEP 
MAX HOT: Approx. 1,571 STEP-
AIR MIX STEP-
PAir mix servomotor target STEP 
(P

Page 229 of 4500

LEXUS LS430 2003  Factory Repair Manual DATA LIST / ENGINE AND ECT / ALL:  
DATA LIST / ENGINE AND ECT / ALL 
2.ACTIVE TEST 
HINT: 
Performing the ACTIVE TEST
 using the hand-held tester allows the relays, VSV, actuators and so on to 
opera

Page 231 of 4500

LEXUS LS430 2003  Factory Repair Manual IG - GND (A11-9 
- A11-1)LG-R - 
W-BPower source (IG)Ignition switch OFF.0 V
TSDr - GND 
(A11-19 - A11-1)L - W-BSolar sensor signal (Driver 
side)Ignition switch ON. Solar sensor 
subjected to electri

Page 232 of 4500

LEXUS LS430 2003  Factory Repair Manual DS3 - GND 
(A12-8 - A11-1)B-R - W-
BSwing grill STEP motor 
signal
Ignition switch ON. Blower 
motor: Operating Mode selector: 
BI-LEVEL Intelligent swing 
register: ON
Pulse 
generation
DS4 - GND 
(A

Page 233 of 4500

LEXUS LS430 2003  Factory Repair Manual 12)side)switch ON.
DrDN - DrGND 
(A12-21 - A12-
11)P-L - LG-
RTemperature control 
switch signal (Driver side)Push driver temperature switch 
OFF.10 to 14 V
DrDN - DrGND 
(A12-21 - A12-
11)P-L - LG-
R