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Home >> Lexus >> 2007 >> IS 250 AWD >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Starting (4GR-FSE) >> Smart Access System With Push-Button Start >> Problem Symptoms Table
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Problem Symptoms Table

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SMART ACCESS SYSTEM WITH PUSH-BUTTON START 

PROBLEM SYMPTOMS TABLE

Symptom Suspected area Reference
Power does not turn on (neither ACC nor IG is possible). Place the electrical key on the drivers seat, move the shift lever to the P position, and depress the brake pedal. Check that the engine switch indicator comes on in green. (If the indicator does not come on or comes on in amber, see "ID code matching inside the cabin cannot be performed" in this table.) (A/T) CUSTOMIZE PARAMETERS
Place the electrical key on the drivers seat and depress the clutch pedal. Check that the engine switch indicator comes on in green. (If the indicator does not come on or comes on in amber, see "ID code matching inside the cabin cannot be performed" in this table.) (M/T) CUSTOMIZE PARAMETERS
AM1 and AM2 circuit (B2271) DTC B2271 Ignition Hold Monitor Malfunction 
Check the IG1 relay (DTC B2272). DTC B2272 Ignition 1 Monitor Malfunction 
Check the IG2 relay (DTC B2273). DTC B2273 Ignition 2 Monitor Malfunction 
Check the ACC relay (DTC B2274). DTC B2274 ACC Monitor Malfunction 
Check the input terminal of the engine switch (DTC B2278). DTC B2278 Engine Switch Circuit Malfunction 
Replace the power source control ECU. -
Power is not turned on (only ACC is not turned on). AM1 and AM2 circuit (B2271) DTC B2271 Ignition Hold Monitor Malfunction 
ACCD circuit (B2274) DTC B2274 ACC Monitor Malfunction 
Check steering lock position (DTC B2285, B2288) DTC B2285, B2288: Steering Lock Position Signal Circuit Malfunction; Steering Lock Signal Circuit Malfunction 
Check LIN communication line (DTC B2287) DTC B2287: LIN Communication Master Malfunction 
Replace power source control ECU. -
Power is not turned on (only IG is not turned on). AM1 AM2 circuit (B2271) DTC B2271 Ignition Hold Monitor Malfunction 
IG1D circuit (B2272) DTC B2272 Ignition 1 Monitor Malfunction 
IG2D circuit (B2273) DTC B2273 Ignition 2 Monitor Malfunction 
Check steering lock position (DTC B2285, B2288) DTC B2285, B2288: Steering Lock Position Signal Circuit Malfunction; Steering Lock Signal Circuit Malfunction 
Check LIN communication line (DTC B2287) DTC B2287: LIN Communication Master Malfunction 
Replace power source control ECU. -
Power source mode does not change. - Power Source Mode does not Change 
Engine does not start. (Cranking does not occur.) Check for DTCs in the smart access system with push button start. DTC CHECK / CLEAR
Check that the engine switch is turned on (IG). Engine Does Not Start 
Check cranking operation. (If cranking operation is possible, see "Engine does not start due to the engine immobilizer" in this table.) HOW TO PROCEED WITH TROUBLESHOOTING
Check "SHIFT P SIG" in the DATA LIST of the power source control ECU and confirm that the shift signal is normal (A/T). TERMINALS OF ECU 
Check clutch start switch (M/T) ON-VEHICLE INSPECTION
Check whether the steering wheel is locked or unlocked. (If it is locked, see "Steering wheel cannot be unlocked" in the steering lock function table.) HOW TO PROCEED WITH TROUBLESHOOTING
Check the output signal from the STSW of the power source control ECU (DTC B2275). DTC B2275 STSW Monitor Malfunction 
Terminals of ACCR and CTSW are turned starting the engine (DTC B2276). DTC B2276 ACCR Signal Circuit Malfunction 
Stop light switch circuit (B2284) DTC B2284 Brake Signal Malfunction (Cable-Information does not Match to Bean-Information) 
Clutch start switch circuit (M/T) -
Starter relay circuit SYSTEM DIAGRAM 
Engine does not start. (First combustion does not occur.) Check for DTCs in the smart access system with pushbutton start. DTC CHECK / CLEAR
SFI system READINESS MONITOR DRIVE PATTERN
Engine switch indicator light does not come on. Engine switch indicator light circuit Engine Switch Indicator Circuit