engine LEXUS LS430 2003 Factory Repair Manual

AUTOMATIC TRANSMISSION DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
CIRCUIT, B+ SHORT CIRCUIT IN ABS MOTOR
RELAY CIRCUIT, SHORT CIRCUIT IN ABS
MOTOR FAIL SAFE RELAY CIRCUIT
DTC C0278/11, C0279/12 OPEN/SHORT CIRCUIT IN ABS SOLENOID
RELAY CIRCUIT
DTC C1201/51 ENGINE CONTROL SYSTEM MALFUNCTION
DTC C1203/53 ECM COMMUNICATION CIRCUIT
MALFUNCTION
DTC C1210/36, C1336/39 ZERO POINT CALIBRATION OF YAW
RATE/DECELERATION SENSOR UNDONE
DTC C1223/43 ABS CONTROL SYSTEM MALFUNCTION
DTC C1231/31 MALFUNCTION IN STEERING ANGLE
SENSOR CIRCUIT
DTC C1232/32, C1234/34, C1243/43, C1244/44,
C1245/45, C1381/97
MALFUNCTION IN DECELERATION/YAW
RATE SENSOR, OPEN OR SHORT IN
DECELERATION SENSOR CIRCUIT,
MALFUNCTION IN POWER SUPPLY VOLTAGE
YAW/DECELERATION SENSOR
DTC C1235/35, C1236/36, C1238/38, C1239/39 FOREIGN MATTER IS ATTACHED ON TIP OF
RIGHT/LEFT FRONT/REAR SENSOR
DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE
DTC C1246/46 MALFUNCTION IN MASTER CYLINDER
PRESSURE SENSOR
DTC C1249/49 OPEN CIRCUIT IN STOP LIGHT SWITCH
CIRCUIT
DTC C1251/51 PUMP MOTOR IS LOCKED/OPEN CIRCUIT IN
PUMP MOTOR GROUND
DTC C1267/67 Brake Pedal Load Sensing Switch
DTCDescription
DTC P0705, P0850 TRANSMISSION RANGE SENSOR CIRCUIT
MALFUNCTION (PRNDL INPUT),
PARK/NEUTRAL SWITCH INPUT CIRCUIT
DTC P0710, P0712, P0713 TRANSMISSION FLUID TEMPERATURE
SENSOR "A" CIRCUIT LOW/HIGH INPUT
DTC P0711 TRANSMISSION FLUID TEMPERATURE
SENSOR "A" PERFORMANCE
DTC P0717 TURBINE SPEED SENSOR CIRCUIT NO
SIGNAL
DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH
DTC P0729 GEAR 6 INCORRECT RATIO

ENGINE IMMOBILIZER DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION (W/SMART
KEY)
ENGINE IMMOBILIZER DIAGNOSTIC TROUBLE CODES (DTC) IDENTIFICATION (W/O
SMART KEY)
C1714, DTC C1714 CIRCUIT
DTC C1715, DTC C1716, DTC C1717, DTC
C1791, DTC C1792, DTC C1793
RIGHT FRONT ACCELERATION SENSOR CIRCUIT
DTC C1725, DTC C1726, DTC C1727, DTC
C1728
RIGHT FRONT ABSORBER CONTROL ACTUATOR
CIRCUIT
DTC C1735 EXHAUST SOLENOID VALVE CIRCUIT
DTC C1737, DTC C1738, DTC C1739, DTC
C1740
RIGHT FRONT HEIGHT CONTROL SOLENOID
VALVE CIRCUIT
DTC C1741 AIR SUS RELAY CIRCUIT
DTC C1742 HEIGHT CONTROL COMPRESSOR CIRCUIT
DTC C1751, DTC C1752 CONTINUOUS ELECTRIC CURRENT TO HEIGHT
CONTROL COMPRESSOR
DTC C1761 ECU MALFUNCTION
DTC C1774 POWER SOURCE CIRCUIT
DTC C1776 SPEED SENSOR CIRCUIT
DTC C1777 STEERING ANGLE SENSOR CIRCUIT
DTC C1786 HEIGHT CONTROL SWITCH CIRCUIT (TEST
DIAGNOSIS)
DTC C1787 ABSORBER CONTROL SWITCH CIRCUIT (TEST
DIAGNOSIS)
DTCDescription
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
DTC B2793 TRANSPONDER CHIP MALFUNCTION
DTC B2794 UNMATCHED ENCRYPTION CODE
DTC B2795 UNMATCHED KEY CODE
DTC B2797 COMMUNICATION MALFUNCTION NO.1
DTC B2799 ENGINE IMMOBILIZER SYSTEM
MALFUNCTION
DTCDescription
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
DTC B2793 TRANSPONDER CHIP MALFUNCTION

ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
DTC B2794 UNMATCHED ENCRYPTION CODE
DTC B2795 UNMATCHED KEY CODE
DTC B2796, DTC B2798 NO COMMUNICATION IN IMMOBILIZER
SYSTEM
DTC B2797 COMMUNICATION MALFUNCTION NO.1
DTC B2799 ENGINE IMMOBILIZER SYSTEM
MALFUNCTION
DTCDescription
DTC P0230 FUEL PUMP PRIMARY CIRCUIT
DTC P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308
RANDOM/MULTIPLE CYLINDER MISFIRE
DETECTED, CYLINDER 1/2/3/4/5/6/7/8 MISFIRE
DETECTED
DTC P0325, P0327, P0328, P0330, P0332, P0333 KNOCK SENSOR 1 CIRCUIT (BANK 1 OR
SINGLE SENSOR), KNOCK SENSOR 1 CIRCUIT
LOW/HIGH INPUT (BANK 1 OR SINGLE
SENSOR), KNOCK SENSOR 2 CIRCUIT (BANK
2), KNOCK SENSOR 2 CIRCUIT LOW/HIGH
INPUT (BANK 2)
DTC P0335, P0339 CRANKSHAFT POSITION SENSOR "A"
CIRCUIT, CRANKSHAFT POSITION SENSOR
"A" CIRCUIT INTERMITTENT
DTC P0340: P0341, P0345, P0346: CAMSHAFT
POSITION SENSOR "A" CIRCUIT (BANK 1
OR SINGLE SENSOR), CAMSHAFT
POSITION SENSOR "A" CIRCUIT
RANGE/PERFORMANCE (BANK 1 OR
SINGLE SENSOR), CAMSHAFT POSITION
SENSOR "A" CIRCUIT (BANK 2),
CAMSHAFT POSITION SENSOR "A"
CIRCUIT RANGE/PERFORMANCE (BANK
2)
P0341, P0345, P0346: CAMSHAFT POSITION
SENSOR "A" CIRCUIT (BANK 1 OR SINGLE
SENSOR), CAMSHAFT POSITION SENSOR "A"
CIRCUIT RANGE/PERFORMANCE (BANK 1 OR
SINGLE SENSOR), CAMSHAFT POSITION
SENSOR "A" CIRCUIT (BANK 2), CAMSHAFT
POSITION SENSOR "A" CIRCUIT
RANGE/PERFORMANCE (BANK 2)
DTC P0351, P0352, P0353, P0354, P0355, P0356,
P0357, P0358
IGNITION COIL "A"/"B"/"C"/"D"/"E"/"F"/"G"/"H"
PRIMARY/SECONDARY CIRCUIT
DTC P0420, P0430 CATALYST SYSTEM EFFICIENCY BELOW
THRESHOLD (BANK 1)/(BANK 2)
DTC P043E, P043F EVAPORATIVE EMISSION SYSTEM LEAK
DETECTION REFERENCE ORIFICE LOW
FLOW; EVAPORATIVE EMISSION SYSTEM
REFERENCE ORIFICE HIGH FLOW
DTC P0441 EVAPORATIVE EMISSION CONTROL SYSTEM
INCORRECT PURGE FLOW

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

Fig. 16: Inspecting Mode Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
If the system cannot switch to the constant speed control mode, push the ON-OFF button off once, and
perform the same procedures as shown above. If a malfunction is still detected in the system, start the
engine again and perform the above procedure.

Fig. 18: Multi-Information Display Chart On Combination Meter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
The indication is immediately set to "LONG" each time the engine is started.
If a normal system code is displayed during the DTC check but the problem still occurs, check the suspected
areas for each problem symptom in the order given in the table below and proceed to the relevant
troubleshooting page.
HINT:
Inspect the "Fuse" and "Relay" before confirming the suspected areas as shown in the chart below. Inspect each
suspected area for the correspondin
g symptom in numerical order.

Fig. 18: Multi-Information Display Chart On Combination Meter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
The indication is immediately set to "LONG" each time the engine is started.
If a normal system code is displayed during the DTC check but the problem still occurs, check the suspected
areas for each problem symptom in the order given in the table below and proceed to the relevant
troubleshooting page.
HINT:
Inspect the "Fuse" and "Relay" before confirming the suspected areas as shown in the Fig. 19
below. Inspect
each suspected area for the correspondin
g symptom in numerical order.

BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES LOCATION
ComponentLocation
ABS CUT RelayOn engine room No. 3 R/B. See Fig. 7 .
ABS MTR RelayOn engine room No. 3 R/B. See Fig. 7 .
A/C COMP RelayOn engine room No. 1 R/B. See Fig. 5 .
AIR SUS RelayOn fusible link block. See Fig. 8 .
Clearance Sonar Buzzer (Front)Behind left side of dash. See Fig. 2 .
Clearance Sonar Buzzer (Rear)Near center of rear speaker shelf, at base of rear
window. See Fig. 19
.
C/OPN RelayOn engine room No. 1 R/B. See Fig. 5 .
D-ACC RelayOn driver side J/B. See Fig. 9 .
DEFOG RelayOn engine room No. 2 R/B. See Fig. 6 .
D-IG1 RelayOn driver side J/B. See Fig. 9 .
EFI MAIN RelayOn engine room No. 1 R/B. See Fig. 5 .
FAN RelayOn fusible link block. See Fig. 8 .
F/PMP RelayOn engine room No. 1 R/B. See Fig. 5 .
Headlight Cleaner Control RelayBelow left headlight. See Fig. 1 .
HEAD LP RelayOn engine room No. 1 R/B. See Fig. 5 .
IG1 RelayOn engine room No. 1 R/B. See Fig. 5 .
IG2 RelayOn engine room No. 1 R/B. See Fig. 5 .
Keyless BuzzerInside top of left front fender, near base of "A"
pillar. See Fig. 14
.
L-ACC RelayOn luggage room J/B. See Fig. 11 .
L-IG1 RelayOn luggage room J/B. See Fig. 11 .
P-ACC RelayOn driver side J/B. See Fig. 10 .
P-IG1 RelayOn driver side J/B. See Fig. 10 .
Rear Sunshade Control RelayBelow center of rear speaker shelf. See Fig. 4 .
RR S/SHADE RelayOn luggage room J/B. See Fig. 11 .
STARTER RelayOn fusible link block. See Fig. 8 .
Telephone Transceiver & Speaker RelayOn left side of luggage compartment. See Fig. 4 .
VSC Warning BuzzerBehind lower left side of dash. See Fig. 18 .
ComponentLocation

CONTROL UNITS LOCATION
Blower Motor ResistorCenter rear of vehicle. See Fig. 29 .
Engine Room No. 1 J/BOn left front of engine compartment, behind
headlight. See Fig. 1
.
Engine Room No. 1 R/BOn left front of engine compartment, behind
headlight. See Fig. 1
.
Engine Room No. 2 R/BOn left front of engine compartment, behind
headlight. See Fig. 1
.
Engine Room No. 3 R/BOn left rear of engine compartment. See Fig. 1 .
Fuel Pump ResistorLeft rear of engine compartment. See Fig. 13 .
Fusible Link BlockOn right rear of engine compartment. See Fig. 1 .
Luggage Room J/BOn left side of luggage compartment. See Fig. 4 .
Overhead J/BAt front of roof opening. See Fig. 4 .
ComponentLocation
AFS ECURight side of dash. See Fig. 2 .
Air Suspension ECUBehind right side of dash. See Fig. 2 .
Canister Pump ModuleLeft rear of vehicle. See Fig. 19 .
Clearance Sonar ECUOn left side of luggage compartment. See Fig. 4 .
Climate Control Seat ECU (Driver's Seat)Under right side of driver's seat. See Fig. 31 .
Climate Control Seat ECU (Front Passenger's Seat)Under front passenger's seat. See Fig. 31 .
Climate Control Seat ECU (Rear LH Seat)In left side of rear seat. See Fig. 32 .
Climate Control Seat ECU (Rear RH Seat)In right side of rear seat. See Fig. 32 .
Cooling Fan ECUOn front center of engine compartment, on radiator
support. See Fig. 1
.
Distance Control ECUBehind right side of dash. See Fig. 16 .
Door Lock Control ReceiverRight rear of luggage compartment. See Fig. 19 .
Driver Door ECUInside front of left front door. See Fig. 4 .
Driver Seat ECUBelow left side of driver's seat. See Fig. 31 .
Driver Side J/B ECUAt left kick panel. See Fig. 16 .
Engine Control ModuleOn left front of engine compartment, in protective
case. See Fig. 1
.
Front ControllerOn engine room No. 2 R/B. See Fig. 6 .
Front Passenger Door ECUInside right front door. See Fig. 4 .
Gateway ECUBehind left end of dash. See Fig. 16 .
Headlight Control ECU LHBehind left headlight. See Fig. 1 .
Headlight Control ECU RHBehind right headlight. See Fig. 1 .
Luggage Room J/B ECUOn left side of luggage compartment. See Fig. 4 .
Moon Roof Control ECUAt front of roof opening. See Fig. 4 .
On lower right side of luggage compartment. See

Fuel Lid Opener MotorOn left side of luggage compartment, behind left
rear fenderwell. See Fig. 19
.
Headlight Beam Level Control Actuator LHBehind left headlight. See Fig. 13 .
Headlight Beam Level Control Actuator RHBehind right headlight. See Fig. 13 .
Headlight Cleaner MotorBelow left headlight. See Fig. 13 .
Height Control CompressorOn right front of engine compartment. See Fig. 13 .
Luggage Compartment Door Closer MotorOn center rear of luggage compartment lid. See Fig.
28 .
Power Seat Module (Rear Passenger's RH Seat Slide
Control)Right side of rear seat. See Fig. 32 .
Power Seat Motor (Driver's Seat Cushion Control)Lower left side of driver's seat. See Fig. 31 .
Power Seat Motor (Driver's Seat Front Vertical
Control)Lower left side of driver's seat. See Fig. 31 .
Power Seat Motor (Driver's Seat Lifter Control)Lower right side of driver's seat bottom. See Fig.
31 .
Power Seat Motor (Driver's Seat Lumbar Support
Lower Side Control)Lower right side of driver's seat cushion. See Fig.
31 .
Power Seat Motor (Driver's Seat Lumbar Support
Upper Side Control)Upper right side of driver's seat back. See Fig. 31 .
Power Seat Motor (Driver's Seat Reclining Control)Lower left rear side of driver's seat bottom. See Fig.
31 .
Power Seat Motor (Driver's Seat Slide Control)In lower left side of driver's seat cushion. See Fig.
31 .
Power Seat Motor (Front Passenger's Seat Front
Vertical Control)In lower right side of front passenger's seat bottom.
See Fig. 31
.
Power Seat Motor (Front Passenger's Seat Head
Rest Control)In upper left side of front passenger's seat back. See
Fig. 31
.
Power Seat Motor (Front Passenger's Seat Lifter
Control)In lower left side of front passenger's seat bottom.
See Fig. 31
.
Power Seat Motor (Front Passenger's Seat Lumbar
Support Control)Lower left rear of front passenger seat cushion. See
Fig. 31
.
Power Seat Motor (Front Passenger's Seat Reclining
Control)Lower right side of front passenger's seat. See Fig.
31 .
Power Seat Motor (Front Passenger's Seat Slide
Control)Under passenger's seat cushion. See Fig. 31 .
Power Seat Motor (Rear Passenger's LH Seat Slide
Control)Left side of rear seat. See Fig. 32 .
Power Window Motor Front LHIn left front door. See Fig. 29 .
Power Window Motor Front RHIn right front door. See Fig. 29 .
Power Window Motor Rear LHIn left rear door. See Fig. 29 .
Power Window Motor Rear RHIn right rear door. See Fig. 29 .
Rear Blower MotorCenter rear of vehicle. See Fig. 29 .
Rear Damper Servo MotorRear center of luggage compartment. See Fig. 29 .