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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 48 (Engine Control System (1AR-FE) (Diagnostic Codes (P0420-P1603) & Circuit Tests)) >> SFI System >> DTC P1603: Engine Stall History; DTC P1605: Rough Idling >> Description

DTC P1603: Engine Stall History; DTC P1605: Rough Idling: Description

WARNING: This page is about a different variant/trim than selected.

P1603 

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.

Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

DTC No. DTC Detection Condition Trouble Area
P1603 After monitoring for startability problems (P1604) finishes and 5 seconds or more elapse after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 RPM or less) without the ignition switch being operated for 0.5 seconds or more
(1 trip detection logic)
  • Air leak in intake system
  • Purge VSV
  • Brake booster hose not connected properly
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Wire harness or connector
  • Air fuel ratio sensor
  • Power supply circuit (purge VSV, fuel injector assembly, ignition coil)
  • Fuel pump
  • Fuel pump control system
  • Fuel line
  • Throttle body
  • Camshaft timing oil control valve assembly
  • VVT system
  • Air conditioning system
  • Power steering system
  • Electrical load signal system
  • A/T system
  • Park/neutral position switch
  • ECM

P1605 

This DTC is stored if the engine speed drops below the set speed.

Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when idling is unstable due to running out of fuel.

DTC No. DTC Detection Condition Trouble Area
P1605 After 5 seconds or more elapse after starting the engine, with the engine running, the engine speed drops to 400 RPM or less (1 trip detection logic).
  • Air leak in intake system
  • Purge VSV
  • Brake booster hose not connected properly
  • Mass air flow meter
  • Engine coolant temperature sensor
  • Wire harness or connector
  • Air fuel ratio sensor
  • Power supply circuit (purge VSV, fuel injector assembly, ignition coil)
  • Fuel pump
  • Fuel pump control system
  • Fuel line
  • Throttle body
  • Camshaft timing oil control valve assembly
  • VVT system
  • Knock sensor
  • Ignition coil
  • Fuel injector assembly
  • Spark plug(s)
  • Air conditioning system
  • Power steering system
  • Electrical load signal system
  • A/T system
  • Park/neutral position switch
  • ECM
  1. Reference waveforms showing a normal cold engine start 
    Fig 1: Identifying Waveform 1
    GTY296901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Reference waveforms showing a normal warm engine start 
    Fig 2: Identifying Waveform 2
    GTY297008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Reference waveforms showing an engine stop after normal idling 
    Fig 3: Identifying Waveform 3
    GTY295729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reference values when there is an air leak in the intake system during rough idling 
    FREEZE FRAME DATA P1605 ROUGH IDLING

    Parameter -3 -2 -1 0 1 Unit
    Engine Speed 533 516 612 420 416 RPM
    Calculate Load 39.2 40.0 40.0 41.1 42.3 %
    Vehicle Load 24.7 27.0 16.8 40.7 35.2 %
    MAF 3.56 3.75 2.81 4.59 3.93 gm/sec
    Atmosphere Pressure 14.5 14.5 14.5 14.5 14.5 psi(gauge)
    Coolant Temp 189 189 189 189 189 F
    Intake Air 109 109 109 109 109 F
    Battery Voltage 13.105 13.144 13.359 12.949 12.910 V
    Throttle Sensor Volt % 17.2 15.6 15.2 16.8 16.4 %
    Throttle Sensor #2 Volt % 49.4 47.4 47.0 49.0 48.6 %
    Throttle Sensor Position 0.0 0.0 0.0 0.0 0.0 %
    Throttle Motor DUTY 17.6 15.2 15.2 15.2 16.8 %
    Injector (Port) 4160 4194 4056 4979 5042 μs
    Injection Volume (Cylinder 1) 0.175 0.175 0.228 0.228 0.228 ml
    Fuel Pump/Speed Status ON ON ON ON ON  
    EVAP (Purge) VSV 0.0 0.0 0.0 0.0 0.0 %
    Evap Purge Flow 0.0 0.0 0.0 0.0 0.0 %
    Purge Density Learn Value 0.000 0.000 0.000 0.000 0.000  
    EVAP purge VSV OFF OFF OFF OFF OFF  
    Target Air-Fuel Ratio 0.999 0.999 0.999 0.999 0.999  
    AF Lambda B1S1 1.232 1.232 1.232 1.232 1.232  
    AFS Voltage B1S1 4.996 4.996 4.996 4.996 4.996 V
    O2S B1 S2 0.000 0.000 0.000 0.000 0.000 V
    Short FT #1 18.750 18.750 18.750 18.750 18.750 %
    Long FT #1 3.906 3.906 3.906 3.906 3.906 %
    Total FT #1 0.000 0.000 0.000 0.000 0.000  
    Fuel System Status #1 CL CL CL CL CL  
    IGN Advance 15.0 14.0 14.5 15.0 0.5 deg
    Knock Feedback Value -3.0 -3.0 -3.0 -3.0 -3.0 CA
    Knock Correct Learn Value 19.0 19.0 19.0 19.0 19.0 CA
    VVT Control Status #1 OFF OFF OFF OFF OFF  
    Starter Signal Close Close Close Close Close  
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