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HINT:Troubleshooting of the theft deterrent system is based on the premise that the door lock control system isoperating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain thatthe door lock control system is operating normally.
DI01V–01N22059A/C Control AssemblyTheft Deterrent ECUINDT410R–YIJ14R–YA145N2204621DI–406–DIAGNOSTICSTHEFT DETERRENT SYSTEM558AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)CIRCUIT INSPECTIONIndicator Light CircuitCIRCUIT DESCRIPTIONWhen the theft deterrent system is preparing to set, this circuit lights up the indicator light. When the systemhas been set, it continually turns the indicator light on for 1 second and turns it off for 1 second, thus blinkingthe indicator light.WIRING DIAGRAMINSPECTION PROCEDURE1Check indicator light.PREPARATION:(a)Remove A/C control assembly.(b)Disconnect indicator light connector.CHECK:Connect the positive (+) lead to terminal 1 and the negative (–)lead to terminal 2 of indicator light connector.OK:Indicator light comes on.NG Replace indicator light.OK
–DIAGNOSTICSTHEFT DETERRENT SYSTEMDI–407559AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)2Check harness and connector between theft deterrent ECU and indicator light,indicator light and body ground (See page IN–27).NG Repair or replace harness or connector.OKCheck and replace theft deterrent ECU.*1*1: When there is a malfunction that the theft deterrent systemcannot be set, proceed to the next numbered circuit inspectionshown on matrix chart (See page DI–405).
N22060Theft Deterrent ECUEJ/CJ/CAAAIGA+B1J35CE/G Room J/B No.2FL BLOCKCFL MAIN3.0 WBattery1114ALT11Instrument Panel J/BInstrument Panel J/BJ16J/CJ6J5T4T3RL–WL–W11W81G122JRR12ASHORT PIN7.5A DOME11D41B25A DOORB–RF11F6F8B100AB–GW–BW–B+B21T3DI–408–DIAGNOSTICSTHEFT DETERRENT SYSTEM560AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)ECU Power Source CircuitCIRCUIT DESCRIPTIONThis circuit provides power to operate the theft deterrent ECU.WIRING DIAGRAMDI01W–01
N20674N20675I00632E/G Room J/B No.2Instrument Panel J/BDOME FuseDOOR FuseN20676E (–)+B1 (+)+B2 (+)–DIAGNOSTICSTHEFT DETERRENT SYSTEMDI–409561AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)INSPECTION PROCEDURE1Check DOME and DOOR fuse.PREPARATION:(a)Remove DOME fuse from engine room junction blockNo.2.(b)Remove DOOR fuse from instrument panel junction blockNo.1.CHECK:Check continuity of DOME and DOOR fuse.OK:ContinuityNGCheck for short in all the harness and compo-nents connected to the DOME and DOOR fuse(See attached wiring diagram).OK2Check voltage between terminals +B1, +B2 and E of theft deterrent ECU connec-tor.PREPARATION:Disconnect the theft deterrent ECU connector.CHECK:Measure voltage between terminals +B1, +B2 and E of theft de-terrent ECU connector.OK:Voltage: 10∼14VOKProceed to next circuit inspection shown onmatrix chart (See page DI–405).
DI–410–DIAGNOSTICSTHEFT DETERRENT SYSTEM562AuthorĂ:DateĂ:1997 LEXUS ES300 (RM511U)NG3Check for open in harness and connector between ECU and body ground (See page IN–27).
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