2003 LEXUS LS430 B2799

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

1.STEERING LOCK ECU DTC CHART
Fig. 27: Steering Lock ECU DTC Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.ECM DTC CHART
Fig. 28: ECM DTC Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DTC B2793TRANSPONDER CHIP MALFUNCTION
DTC B2794UNMATCHED ENCRYPTION CODE
DTC B2795UNMATCHED KEY CODE
DTC B2797COMMUNICATION MALFUNCTION NO.1
DTC B2799ENGINE IMMOBILIZER SYSTEM
MALFUNCTION

Fig. 24: Theft Warning ECU Assy Data List
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.ACTIVE TEST
HINT:
Performing the hand-held tester's ACTIVE TEST allows relay, VSV, actuator and other items to be
operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way
to save time. The DATA LIST can be displayed during the ACTIVE TEST.
a. Connect the hand-held tester (with CAN VIM) to the DLC3.
b. Turn the ignition switch ON.
c. Perform the ACTIVE TEST by following the directions on the tester screen.
Transponder key ECU assy:
TRANSPONDER KEY ECU ASSY - ACTIVE TEST
DIAGNOSTIC TROUBLE CODE CHART
1.TRANSPONDER KEY ECU DTC CHART
ItemTester Details
SECURITY INDICTurn security indicator ON/OFF
DTCDescription
DTC B2780PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
DTC B2793TRANSPONDER CHIP MALFUNCTION
DTC B2794UNMATCHED ENCRYPTION CODE
DTC B2795UNMATCHED KEY CODE
DTC B2796, DTC B2798NO COMMUNICATION IN IMMOBILIZER
SYSTEM
DTC B2797COMMUNICATION MALFUNCTION NO.1
DTC B2799ENGINE IMMOBILIZER SYSTEM
MALFUNCTION

Fig. 43: DTC B2799 - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - ECM)
a. Disconnect the T9 ECU connector.
b. Disconnect the E2 ECM connector.
c. Measure the resistance of the wire harness side connectors.