LEXUS LS430 2003 Factory Repair Manual

HVAC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
LIGHTING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
SENSOR/SWITCH "D"/"E" VOLTAGE
CORRELATION
DTC P2121 THROTTLE/PEDAL POSITION
SENSOR/SWITCH "D" CIRCUIT
RANGE/PERFORMANCE
DTC U0001 HIGH SPEED CAN COMMUNICATION
CIRCUIT
DTCDescription
DTC B1411 ROOM TEMPERATURE SENSOR CIRCUIT
DTC B1412 AMBIENT TEMPERATURE SENSOR CIRCUIT
DTC B1413 EVAPORATOR TEMPERATURE SENSOR CIRCUIT
DTC B1415 AIR DUCT SENSOR CIRCUIT (DRIVER SIDE)
DTC B1416 AIR DUCT SENSOR CIRCUIT (PASSENGER SIDE)
DTC B1418 EMISSION GAS SENSOR CIRCUIT
DTC B1421 SOLAR SENSOR CIRCUIT (PASSENGER SIDE)
DTC B1423 PRESSURE SWITCH CIRCUIT
DTC B1424 SOLAR SENSOR CIRCUIT (DRIVER SIDE)
DTC B1428 REAR SOLAR SENSOR CIRCUIT
DTC B1432 AIR INLET DAMPER POSITION SENSOR CIRCUIT
DTC B1434 MAX COOL DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE)
DTC B1435 MAX COOL DAMPER POSITION SENSOR CIRCUIT (PASSENGER SIDE)
DTC B1442 AIR INLET DAMPER CONTROL SERVOMOTOR CIRCUIT
DTC B1451 COMPRESSOR SOLENOID CIRCUIT
DTC B1461 EMISSION GAS NOX SENSOR CIRCUIT
DTCDescription
DTC B1244 LIGHT SENSOR CIRCUIT MALFUNCTION
DTC B1268 BACK-UP COMMUNICATION BUS MALFUNCTION
DTC B2402, B2403 TRANSISTOR RELAY OVERLOAD/OVERHEAT MALFUNCTION
DTC B2412, B2413 HEADLIGHT SWIVEL MOTOR LH/RH MALFUNCTION
DTC B2414 STEERING POSITION SENSOR MALFUNCTION
DTC B2415 VEHICLE SPEED SENSOR MALFUNCTION
DTC B2416 HEIGHT CONTROL SENSOR MALFUNCTION
DTC B2417, B2418 HEADLIGHT BEAM LEVEL CONTROL MOTOR LH/RH
MALFUNCTION

MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
DTC B2419 BEAN COMMUNICATION MALFUNCTION
DTC B2420 AFS ECU MALFUNCTION
DTCDescription
DTC B1205 AFS ECU COMMUNICATION STOP
DTC B1211 DRIVER DOOR ECU COMMUNICATION STOP
DTC B1212 FRONT PASSENGER DOOR ECU COMMUNICATION STOP
DTC B1213 TILT AND TELESCOPIC ECU COMMUNICATION STOP
DTC B1214, B1215 DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/
(GND SHORT)
DTC B1216 REAR RIGHT DOOR ECU COMMUNICATION STOP
DTC B1217 REAR LEFT DOOR ECU COMMUNICATION STOP
DTC B1219 REAR SEAT SWITCH COMMUNICATION STOP
DTC B1248 AVC-LAN COMMUNICATION IMPOSSIBLE
DTC B1262 A/C ECU COMMUNICATION STOP
DTC B1263 LUGGAGE ROOM JUNCTION BLOCK ECU COMMUNICATION STOP
DTC B1266, B1267 INSTRUMENT PANEL SYSTEM COMMUNICATION BUS MALFUNCTION
(+B SHORT)/(GND SHORT)
DTC B1269 THEFT DETERRENT ECU COMMUNICATION STOP
DTC B1271 COMBINATION METER ECU COMMUNICATION STOP
DTC B1272 POWER SEAT ECU COMMUNICATION STOP
DTC B1273 SLIDING ROOF ECU COMMUNICATION STOP
DTC B1275 ACCESSORY BUS BUFFER COMMUNICATION STOP
DTC B1277 CENTER INTEGRATION ECU COMMUNICATION STOP
DTC B1278 COMBINATION SWITCH ECU COMMUNICATION STOP
DTC B1279 RAIN SENSOR COMMUNICATION STOP
DTC B1281 AIRBAG ECU COMMUNICATION STOP
DTC B1283 DRIVER SIDE JUNCTION BLOCK ECU COMMUNICATION STOP
DTC B1284 PASSENGER SIDE JUNCTION BLOCK ECU COMMUNICATION STOP
DTC B1285 STEERING PAD SWITCH COMMUNICATION STOP
DTC B1291, B1292 LIGHT SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT)/
(GND SHORT)
DTC B1294 IMMOBILIZER ECU COMMUNICATION STOP
DTC B1296 FRONT LIGHT ECU COMMUNICATION STOP
DTC B1297 CLEARANCE SONAR ECU COMMUNICATION STOP
DTC B1298 REAR RIGHT SEAT ECU COMMUNICATION STOP
DTC B1299 REAR LEFT SEAT ECU COMMUNICATION STOP

PRE-COLLISION SAFETY SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
POWER DOOR LOCK CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
POWER TILT & TELESCOPIC STEERING COLUMN DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
DTCDescription
DTC B2000 RIGHT SIDE MOTOR LINE MALFUNCTION HI
DTC B2001 RIGHT SIDE MOTOR LINE MALFUNCTION LO
DTC B2002 RIGHT SIDE MOTOR LINE MALFUNCTION
OPEN
DTC B2005 LEFT SIDE MOTOR LINE MALFUNCTION HI
DTC B2006 LEFT SIDE MOTOR LINE MALFUNCTION LO
DTC B2007 LEFT SIDE MOTOR LINE MALFUNCTION
OPEN
DTC B2015, B2016, B2020, B2021, B2025,
B2026, B2027, B2030, B2031, B2032, B2035,
B2036, B2040, B2041, B2047
RIGHT/LEFT SIDE UPPER/LOWER MOS
MALFUNCTION OPEN, RIGHT SIDE CURRENT
DETECTION CIRCUIT MALFUNCTION HI/LO,
RIGHT/LEFT SIDE OVER-CURRENT
MALFUNCTION, LEFT SIDE CURRENT
DETECTION CIRCUIT MALFUNCTION HI/LO,
POWER SUPPLY RELAY ADHERENCE
MALFUNCTION, POWER SUPPLY RELAY
MALFUNCTION OPEN, EEPROM
MALFUNCTION, FALL OF THE RAISED
VOLTAGE, PRE-COLLISION SAFETY ECU
INNER CIRCUIT MALFUNCTION
DTC B2043 FALL OF THE +B VOLTAGE
DTC B2059 VEHICLE SPEED MALFUNCTION OF
DISTANCE CONTROL ECU
DTC B2064 VEHICLE TYPE SIGNAL MALFUNCTION
DTCDescription
DTC B1222 DOOR LOCK SWITCH CIRCUIT ON DRIVER
DOOR
DTC B1224 DOOR LOCK SWITCH CIRCUIT ON
PASSENGER DOOR
DTCDescription

POWER WINDOW CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
STEERING LOCK SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
DTC B2602 KEY UNLOCK WARNING SWITCH CIRCUIT
MALFUNCTION
DTC B2610 TILT POSITION SENSOR OR TILT MOTOR
CIRCUIT MALFUNCTION
DTC B2611 TELESCOPIC POSITION SENSOR OR
TELESCOPIC MOTOR CIRCUIT
MALFUNCTION
DTC B2620 ECU POWER SOURCE CIRCUIT
MALFUNCTION
DTC B2621 COMMUNICATION INTERRUPTION
DTCDescription
DTC B1221 POWER WINDOW SWITCH CIRCUIT ON DRIVER DOOR
DTC B1223 POWER WINDOW SWITCH CIRCUIT ON PASSENGER DOOR
DTC B1226 POWER WINDOW SWITCH CIRCUIT ON REAR LEFT DOOR
DTC B1225 POWER WINDOW SWITCH CIRCUIT ON REAR RIGHT DOOR
DTC B1231, B1232 JAM PROTECTION LIMIT SWITCH CIRCUIT ON DRIVER DOOR, JAM
PROTECTION PULSE SWITCH CIRCUIT ON DRIVER DOOR
DTC B1233, B1234 JAM PROTECTION LIMIT SWITCH CIRCUIT ON PASSENGER DOOR, JAM
PROTECTION PULSE SWITCH CIRCUIT ON PASSENGER DOOR
DTC B1237, B1238 JAM PROTECTION LIMIT SWITCH CIRCUIT ON REAR LEFT DOOR, JAM
PROTECTION PULSE SWITCH CIRCUIT ON REAR LEFT DOOR
DTC B1235, B1236 JAM PROTECTION LIMIT SWITCH CIRCUIT ON REAR RIGHT DOOR,
JAM PROTECTION PULSE SWITCH CIRCUIT ON REAR RIGHT DOOR
DTCDescription
DTC B2775 INTERIOR VERIFICATION ABNORMAL (TO
THEFT DETERRENT ECU)
DTC B2776 STEERING LOCK MOTOR MALFUNCTION
DTC B2777 +B CIRCUIT MALFUNCTION
DTC B2778 INTERLOCK CABLE MALFUNCTION
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
DTC B2799 ENGINE IMMOBILIZER SYSTEM
MALFUNCTION

WIRELESS DOOR LOCK CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
DTCDescription
DTC B1242With Smart-Key: WIRELESS DOOR LOCK TUNER CIRCUIT
MALFUNCTION
Without Smart-Key: WIRELESS DOOR LOCK TUNER CIRCUIT
MALFUNCTION

PRECAUTION
SYSTEM NAME AND PAGE REFERENCE
Keep in mind the following points when inspecting the dynamic laser cruise control system.
As there is a limitation to the vehicle-to-vehicle distance controlling capability, do not overly rely on the
dynamic laser cruise control system.
Do not neglect to pay constant attention to the vehicle-to-vehicle distance and the traffic conditions when
using the dynamic laser cruise control system. Decelerate with the brake pedal, or accelerate with the
accelerator pedal, according to the situation, to keep an appropriate distance with the vehicle in front.
When the vehicle in front decelerates rapidly or another vehicle pulls out in front of the vehicle,
decelerating in time to avoid a collision may not be possible without additional braking.
The dynamic laser cruise control system is designed to assist in maintaining an appropriate distance with
the vehicle in front. However, the system alone is not sufficient. It is imperative that the driver pays
attention at all times.
The laser sensor has functions to automatically detect dirt on the sensor face and inform the driver, but it
is not perfect. Keep the sensor face clean.
The dynamic laser cruise control system does not work, or give vehicle-approaching warning, for vehicles
which are stopped or driving at significantly slower speeds. Always pay attention to those other vehicles.
The laser sensor detection area is narrow at close range, so detection of a vehicle pulling out just in front
may be delayed, or a motorcycle running on the side of the same lane may not be detected. The distance
to the vehicle in front may not be maintained properly due to these reasons.
Even if ACCEL is operated to increase the set vehicle speed, the vehicle does not accelerate because the
speed is controlled in accordance with the speed of the vehicle in front while driving with the vehicle-to-
vehicle distance control mode on (follow-up cruising). However, as the set vehicle speed has been
increased by ACCEL operation, the vehicle keeps accelerating when there is no vehicle in front. Check
the set speed with the set vehicle speed indication on the display.
The controlled vehicle distance may be shorter than the set vehicle distance when cruising on a long
downhill road.
Push the cruise control main switch ON-OFF button off and reset the cruise control if the master warning
light comes on, the CRUISE main indicator light blinks, and the fail indication is shown on the display
with a "pong" sound during dynamic laser cruise control operation.
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION

The vehicle-approaching warning buzzer does not sound in the constant speed control mode because the
existence of the vehicle in front and the distance to it are not judged as in the vehicle-to-vehicle distance
control mode. Pay attention to the distance to the vehicle in front.
The dynamic laser cruise control system has two cruise control modes: the constant speed control mode
and vehicle-to-vehicle distance control mode. Confirm which mode is selected when using the dynamic
laser cruise control system.

Fig. 1: Identifying Dynamic Laser Cruise Control System Electrical Location (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 2: Identifying Dynamic Laser Cruise Control System Electrical Location (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 3: Wiring Diagram - Dynamic Laser Cruise Control System
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Input and output signals of each ECU.