2003 LEXUS LS430 evap

As the temperature increases, the voltage decreases.
Result:
AIR CONDITIONING AMPLIFIER (TE - SG) TEST RESULT
B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT )
Fig. 49: Inspecting Air Conditioning Amplifier (TE
- SG)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
A: Go to next step
3.INSPECT A/C EVAPORATOR TEMPERATURE SENSOR
a. Remove the A/C evaporator temperature sensor.
b. Measure the resistance according to the value (s) in table below.
NGA
OK (Checking from the PROBLEM SYMPTOM TABLE)B
OK (Checking from the DTC)C

Standard:
A/C EVAPORATOR TEMPERATURE SENSOR RESISTANCE
<0029004c004a0011000300180013001d0003002c005100560053004800460057004c0051004a000300240012002600030028005900440053005200550044005700520055000300370048005000530048005500440057005800550048000300360048005100
5600520055[

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Tester connectionConditionSpecified condition
1 - 2-10°C (14°F)7.40 to 9.20 kohms
1 - 2-5°C (23°F)5.65 to 7.00 kohms
1 - 20°C (32°F)4.35 to 5.40 kohms
1 - 25°C (41°F)3.40 to 4.20 kohms
1 - 210°C (50°F)2.68 to 3.30 kohms
1 - 215°C (59°F)2.10 to 2.60 kohms
1 - 220°C (68°F)1.66 to 2.10 kohms
1 - 225°C (77°F)1.32 to 1.66 kohms
1 - 230°C (86°F)1.05 to 1.35 kohms

HINT:
As the temperature increases, the resistance decrease (see the graph below).
Fig. 51: Resistance/Temperature Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE A/C EVAPORATOR TEMPERATURE SENSOR
HINT:
When replacing the evaporator temperature sensor, the attached sub-harness should be replaced along
with the sensor.
OK: Go to next step
4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - A/C
EVAPORATOR TEMPERATURE SENSOR) (SEE ELECTRONIC CIRCUIT INSPECTION
PROCEDURE )
a. Measure the resistance according to the value (s) in the table below.
Standard:
AIR CONDITIONING AMPLIFIER - A/C EVAPORATOR TEMPERATURE SENSOR

Fig. 53: Identifying Terminals Of A/C Evaporator Temperature Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
This sensor detects the register temperature and sends the appropriate signals to the A/C amplifier.
Fig. 54: DTC Detection Item Trouble Area Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 57: Heating Ring Gear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. After the moisture on the ring gear has completely evaporated, quickly install the ring gear to the
differential case.
HINT:
Align the matchmarks on the ring gear and the differential case.
e. Tighten the new 2 bolts temporarily so that the bolt holes in the ring gear and differential case are
not misaligned.

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

DTC P0450, DTC P0451, DTC P0452, DTC
P0453
EVAPORATIVE EMISSION CONTROL SYSTEM
PRESSURE SENSOR MALFUNCTION;
EVAPORATIVE EMISSION CONTROL SYSTEM
PRESSURE SENSOR RANGE/PERFORMANCE;
EVAPORATIVE EMISSION CONTROL SYSTEM
PRESSURE SENSOR/SWITCH LOW INPUT;
EVAPORATIVE EMISSION CONTROL SYSTEM
PRESSURE SENSOR/SWITCH HIGH INPUT
DTC P0455, DTC P0456 EVAPORATIVE EMISSION CONTROL SYSTEM
LEAK DETECTED (GROSS LEAK);
EVAPORATIVE EMISSION CONTROL SYSTEM
LEAK DETECTED (VERY SMALL LEAK)
DTC P0500, P0503 VEHICLE SPEED SENSOR "A", VEHICLE
SPEED SENSOR "A"
INTERMITTENT/ERRATIC/HIGH
DTC P0504, P0571 BRAKE SWITCH "A"/"B" CORRELATION,
BRAKE SWITCH "A" CIRCUIT
DTC P0505 IDLE AIR CONTROL SYSTEM
DTC P0560 SYSTEM VOLTAGE
DTC P0604, P0606, P0607, P0657 INTERNAL CONTROL MODULE RANDOM
ACCESS MEMORY (RAM) ERROR, ECM/PCM
PROCESSOR, CONTROL MODULE
PERFORMANCE, ACTUATOR SUPPLY
VOLTAGE CIRCUIT/OPEN
DTC P0617 STARTER RELAY CIRCUIT HIGH
DTC P0630 VIN NOT PROGRAMMED OR MISMATCH -
ECM/PCM
DTC P1340, P1341 CAMSHAFT POSITION SENSOR "A" (BANK 1
SENSOR 2)
DTC P2102, P2103 THROTTLE ACTUATOR CONTROL MOTOR
CIRCUIT LOW/HIGH
DTC P2111, P2112 THROTTLE ACTUATOR CONTROL SYSTEM -
STUCK OPEN/CLOSED
DTC P2118 THROTTLE ACTUATOR CONTROL MOTOR
CURRENT RANGE/PERFORMANCE
DTC P2119 THROTTLE ACTUATOR CONTROL THROTTLE
BODY RANGE/PERFORMANCE
DTC P2120, P2122, P2123, P2125, P2127, P2128,
P2138
THROTTLE/PEDAL POSITION
SENSOR/SWITCH "D" CIRCUIT,
THROTTLE/PEDAL POSITION
SENSOR/SWITCH "D" CIRCUIT LOW/HIGH
INPUT, THROTTLE/PEDAL POSITION
SENSOR/SWITCH "E" CIRCUIT, DTC
THROTTLE/PEDAL POSITION
SENSOR/SWITCH "E" CIRCUIT LOW/HIGH
INPUT, THROTTLE/PEDAL POSITION

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