Toyota/Lexus uses these Electronic Systems:

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DTC on Toyota / Lexus from al tech page (www.alflash.narod.ru/)                  1

                      Toyota/Lexus uses these Electronic Systems:

 Engine (Gas and Diesel)                               Gateway
 Hybrid Vehicle ECU                                    TDS
 ECT (Electronic controlled                            Clearance Sonar
  Transmission)                                         Rain Sensor
 Sequental MT                                          Steering Pad
 Toyota Free Tronic                                    Security
 ABS (Anti-Lock Braking System)                        Mirror
 Traction Control                                      Door
 Air Suspension                                        Seat
 EMS                                                   Slide Roof
 EHPS                                                  Tilt and Telescopic
 AHC                                                   Meter
 EMPS                                                  Combination Switch
 VGRS                                                  Tire Pressure Warning System
 CCS                                                   Rtrctbl Hardtop
 Air Conditioning                                      Wiper
 SRS                                                   Stop and Go
 Body                                                  Manual emergency calling (Sw.
 Body Number 2                                          "Services")
 Body Number 3                                         Lexus Link System (USA only)
 Body Number 4                                         RSCA off Sw
 Body Number 5                                         etc.


  All cars and light trucks built for sale in the United States after 1996 are required to be OBD-II
compliant. The European Union adopted (directive 98/69/EC) a similar law in 2001 for gasoline-
powered vehicles, and in 2003 for cars with diesel engines.
  SAE J2012 (Diagnostic Trouble Codes1) defines a set of diagnostic trouble codes (DTCs) where
industry uniformity has been achieved. DTCs consist of an alpha character followed by four
characters.
  Pxxxx is reserved for powertrain DTCs
  Bxxxx is reserved for body DTCs
  Cxxxx is reserved for chassis DTCs
  Uxxxx is reserved for network DTCs (UART the body electronics like door and roof control, air
conditioning, and lightning, as well as for the entertainment control).
  The second character designates whether the DTCs and a generic SAE DTC or a manufacturer-
specific DTC.
   Powertrain codes                                   Body codes
   P0xxx - Generic                                    B0xxx - Generic
   P1xxx - Manufacturer-specific                      B1xxx - Manufacturer-specific
   P2xxx - Generic                                    B2xxx - Manufacturer-specific
   P30xx-P33xx - Manufacturer-specific                B3xxx - Generic
   P34xx-P39xx - Generic
   Chassis codes                                      Network Communication codes
   C0xxx - Generic                                    U0xxx - Generic
   C1xxx - Manufacturer-specific                      U1xxx - Manufacturer-specific
   C2xxx - Manufacturer-specific                      U2xxx - Manufacturer-specific
   C3xxx - Generic                                    U3xxx - Generic
  The remaining characters designate the system associated with the fault. The characters are hex
and can range from 0  F.
  The third digit defines the specific system or sub-system within the car where the problem is
located:
      Third digit / System or sub-system

1
    Note: Not all trouble codes are used on all models
                          Note: Not all trouble codes are used on all models
                  DTC on Toyota / Lexus from al tech page (www.alflash.narod.ru/)                     2

      1 Fuel and Air Metering
      2 Fuel and Air Metering (injector circuit malfunction only)
      3 Ignition System or Misfire
      4 Auxiliary Emission Control System
      5 Vehicle Speed Control and Idle Control System
      6 Computer Output Circuits
      7 Transmissions
      8 Transmissions
      9 Control Modules, input and output signals
Note. Standardized Electronic Format of Service Information (J2008). Beginning January 1, 2002,
manufacturers shall make available at a fair and reasonable price, all 2002 and newer model year
vehicle emission-related diagnosis and repair information provided to the manufacturer's
franchised dealers (e.g., service manuals, technical service bulletins, etc.) in the electronic format
specified in SAE Recommended Practice J2008 Draft Technical Report, "Recommended
"Organization of Service Information" (J2008), October, 1998, November, 1995. The information
shall be made available within 30 days of its availability to franchised dealers.
Note. Courtesy regulations on June 8, 2001 (66 FR 30830) "...OEMs must make full text
emissions-related service information available via the World Wide Web2. Second, that OEMs
must provide equipment and tool companies with information that allows them to develop pass-
through reprogramming tools. Third, OEMs must make available enhanced diagnostic information
to equipment and tool manufacturers and to make available OEM-specific diagnostic tools for
sale...".
  Testifying on behalf of the Alliance of Automobile Manufacturers, Greg Dana, Vice President for
Environmental Affairs stated, "Historically, about 75* percent of vehicle service and repairs are
performed in non-dealer shops. The auto industry views these non-dealer shops as their partners
in providing service to their mutual customers, the driving public. Automakers are required by law
to provide all information to diagnose and repair engine, transmission, fuel, and emission control
systems."
  Note.CAN ISO 11898 (Controller Area Network) is the newest computer protocol in the
automotive industry and is mandatory on all cars by 2008.
  The CAN protocol has been integrated into the OBD-II spec by the International Standards
Organization (ISO) committee and has been accepted as the standard diagnostic protocol by
manufacturers. In addition, the California Air Resources Board (CARB) has embraced CAN and
made it mandatory for all vehicles. Manufacturers can begin implementing CAN in 2003 and must
be CAN compliant by 2008 model year. The CAN standard is also a mandatory part of each new
state emissions inspection and maintenance program and will be retrofitted into the established
programs.
  Note.In most newer computer systems, fault codes are stored in a "nonvolatile" memory that is
not lost if the battery is disconnected. The codes remain intact until they are cleared using a scan
tool (which few motorists own). What's more, disconnecting the battery or computer's power
supply can have undesirable consequences because it causes the loss of the engine
computer's "learned" memory - the adjustments that are made over time to compensate for
engine wear and driving habits. On some vehicles where the computer also regulates the
electronic transmission, the computer may have to be put through a special learning procedure to
relearn the proper operation of the transmission if power has been lost!
  Another issue that is related to OBD II is that of reprogramming vehicle computers. Most late-
model computers have some type of flash PROM memories that can be reprogrammed if
MAINT REQD, VGRS


2
  Industry estimates indicate that independent technicians perform up to 80% of all vehicle service and
repairs (These conclusions are confirmed by statistics issued from the Motor and Equipment Manufacturers
Association (Automotive Industry Status Report, 1999. EPA Air Docket A-2000-49, item II-F-05)




                            Note: Not all trouble codes are used on all models
                       DTC on Toyota / Lexus from al tech page (www.alflash.narod.ru/)     3

    CodeNo.                                                 Description
     B0100    Short In D Squib Circuit / 13
     B0101    Open in Driver-Side Air Bag Module Squib Circuit /14
     B01023   Short in D Squib Circuit (to Ground) / 11
     B0103    Short in D Squib Circuit (to B+) / 12
     B0105    Short in P Side Air Bag Squib Circuit / 53
     B0106    Open In P Side Air Bag Squib Circuit / 54
     B0107    Short In P Side Air Bag Squib Circuit (to Ground) / 51
     B0108    Short In P Side Air Bag Squib Circuit (to B+) / 52
     B0110    Short In Side Squib (RH) Circuit / 43
     B0111    Open In Side Squib (RH) Circuit / 44
     B0111    Cab Side Airbag Circuit (Range/Performance) Malfunction ( 4 AV.'99)
     B0112    Short In Side Air Bag Module Squib (RH) Circuit (to Ground) / 41
     B0113    Short In Side Squib (RH) Circuit (to B+) / 42
     B0115    Short in Side Air Bag Module Squib (LH) Circuit / 47
     B0116    Open In Side Air Bag Module Squib (LH) Circuit / 48
     B0117    Short In Side Squib (LH) Circuit (to Ground) / 45
     B0118    Short In Side Air Bag Module Squib (LH) Circuit (to B+) / 46
     B0121    Seat Belt Buckle Swith, RH malfunction / 26
     B0122    Seat Belt Buckle Swith, RH malfunction / 26
     B0126    Seat Belt Buckle Swith, LH malfunction / 27
     B0127    Seat Belt Buckle Swith, LH malfunction / 27
     B0130    Short in P-Side Seat Belt Pretensioner Squib (RH) Circuit / 63
     B0131    Open in P-Side Seat Belt Pretensioner Squib (RH) Circuit / 64
     B0132    Short in P-Side Seat Belt Pretensioner Squib (RH) Circuit (to Ground) / 61
     B0133    Short in P-Side Seat Belt Pretensioner Squib (RH) Circuit (to B+) / 62
     B0135    Short in D-Side Seat Belt Pretensioner Squib (LH) Circuit / 73
     B0136    Open in D-Side Seat Belt Pretensioner Squib (LH) Circuit / 74
     B0137    Short in D-Side Seat Belt Pretensioner Squib (LH) Circuit (to Ground) / 71
     B0138    Short in D-Side Seat Belt Pretensioner Squib (LH) Circuit (to B+) / 72
     B1100    Airbag Sensor Assembly Malfunction (Progr. Avens) / 31 
     B1135    SRS Control Module  poor multi-plug connection / 24
     B1140    Side Airbag Sensor Assembly (RH) Malfunction / 32
     B1141    Side Airbag Sensor Assembly (LH) Malfunction / 33
     B1142    Door Side Airbag Sensor (RH) Malfunction
     B1143    Door Side Airbag Sensor (RH) Malfunction
     B1144    Door Side Airbag Sensor (LH) Malfunction
     B1145    Door Side Airbag Sensor (LH) Malfunction
     B1146    Side Crach Sensor, RH B post Malfunction / 32
     B1147    Side Crach Sensor, LH B post Malfunction / 33
     B1148    Front Crach Sensor, RH Malfunction / 36
     B1149    Front Crach Sensor, LH Malfunction / 37
     B1153    Seat Position Sensor malfunction / 25
     B1154    Side Crach Sensor, Rear RH in C posts / 38
     B1155    Side Crach Sensor, Rear LH in C posts / 39
     B1156    Front Airbag (Front crach) Sensor (RH) Malfunction / 15
     B1157    Front Airbag (Front crach) Sensor (RH) Malfunction / 15
     B1158    Front Airbag (Front crach) Sensor (LH) Malfunction / 16
     B1159    Front Airbag Sensor (LH) Malfunction / 16
     B1160    Inflatable curtain RH short circuit / 83
     B1161    Inflatable curtain RH open circuit / 84
     B1162    Inflatable curtain RH short circuit to Earth / 81
     B1163    Inflatable curtain RH short circuit to Positive / 82
     B1165    Inflatable curtain LH short circuit / 87
     B1166    Inflatable curtain LH open circuit / 88
     B1167    Inflatable curtain LH short circuit to Earth / 85
     B1168    Inflatable curtain LH short circuit to Positive / 86
     B1180    Driver's Air Bag, Stage 2  short circuit / 17
     B1181    Driver's Air Bag, Stage 2  open circuit / 18
     B1182    Driver's Air Bag, Stage 2   short circuit to Earth / 19
     B1183    Driver's Air Bag, Stage 2  short circuit tp Positive / 22

3
    e.g. on a `00 Toyota Celica GT-S, Avensis D-4D `03
4
    I read on this Vehicles
                                 Note: Not all trouble codes are used on all models
                    DTC on Toyota / Lexus from al tech page (www.alflash.narod.ru/)             4

    B1185    Passenger Air Bag Stage 2 short circuit / 57
    B1186    Passenger Air Bag Stage 2 open circuit / 58
    B1187    Passenger Air Bag Stage 2 short circuit to Earth / 55
    B1188    Passenger Air Bag Stage 2 short circuit to Positive / 56
    B12115   No Communication Between Driver's Door ECU & Body ECU/11
    B1212    No Communication Between Passenger's Front Door ECU & Body ECU / 12
    B1214    Door System Bus Communication Circuit is Shorted To Battery Voltage / 14
    B1215    Door System Bus Communication Circuit is Shorted To Ground / 15
    B1216    No Communication Between Right Rear Door ECU & Body ECU / 16
    B1217    No Communication Between Left Rear Door ECU & Body ECU / 17
    B1221    Power Window Master Switch Circuit / 21
    B1222    Driver's Door Lock Control Switch Circuit / 22
    B1223    Passenger's Front Window Switch Circuit / 23
    B1224    Passenger's Door Lock Control Switch Circuit / 24
    B1225    Right Rear Window Switch Circuit / 25
    B1226    Left Rear Window Switch Circuit / 26
    B1231    Driver's Jam Protection Limit Switch Circuit / 31
    B1232    Driver's Jam Protection Pulse Switch Circuit / 32
    B1233    Passenger's Front Jam Protection Limit Switch Circuit / 33
    B1234    Passenger's Front Jam Protection Pulse Switch Circuit / 34
    B1235    Right Rear Jam Protection Limit Switch Circuit / 35
    B1236    Right Rear Jam Protection Pulse Switch Circuit / 36
    B1237    Left Rear Jam Protection Limit Switch Circuit / 37
    B1238    Left Rear Jam Protection Pulse Switch Circuit / 38
    B1241    Body ECU Switch Circuit Diagnosis ONE OF MONITORED SWITCHES HAS ABNORMAL OUTPUT / 41
    B1242    Wireless Door Lock Tuner Circuit Malfunction (WIRELESS DOOR LOCK RECEIVER) / 42
    B1243    GSW TERMINAL CIRCUIT MALFUNCTION / 43
    B1244    Light Sensor Circuit Malfunction / 44
    B1251    MIRROR CONTROL SWITCH / 51
    B1256    Instrument Control Panel Circuit Diagnosis / 56
    B1261    No Communication Between ECM & Body ECU / 61
    B1269    THEFT DETERRENT ECU COMMUNICATION STOPPED / 69
    B1272    No Communication between Power Seat ECU (W/Memory) & Body ECU (POWER SEAT ECU
             COMMUNICATION STOPPED) / 72
    B1273    No Communication Between Sun Roof Control ECU & Body ECU / 73
    B1275    No Communication Between Accessory Bus Buffer & Body ECU / 75
    B1276    No Communication Between Combination Meter ECU & Body ECU
    B1277    No Communication Between Instrument Control Panel & Body ECU
    B1300    Engine Coolant Temperature Sensor for Hydraulic Cooling Fan Circuit Malfunction
    B1305    Solenoid for Hydraulic Cooling Fan Circuit Malfunction
    B14216   Solar Sensor Circuit (Passenger Side) (Progr., RX3))
    B1423    Open in pressure Sensor Circuit / Abnormal refrigerant Pressure (Progr, RX3)
    B1424    Solar Sensor Circuit (Driver Side) (Progr.)
    B2785    Ignition Switch ON Malfunction / 99
    B2786    Ignition Switch OFF Malfunction / 99
    B2790    Key Unlock Warning Switch ON Malfunction
    B2791    Key Unlock Warning Switch Off Malfunction / 99
    B2793    B2793
    B2794    B2794
    B2795    Unmatched Key Code 7 / 99
    B2796    No Communication in Immobiliser System 8 / 99
    B2797    Communication Malfunction No.1 / 99
    B2798    Communication Malfunction No.2 / 99
    B2799    Engine Immobiliser System Malfunction 9
    C0200    FR Whell Speed Sensor Malfunction (Cald,Cam, RX3, Cel.)
    C0205    FL Whell Speed Sensor Malfunction (Cald, Cel.)
    C0210    RR Whell Speed Sensor Malfunction (Cald,Cam, Cel.)

5
  MULTIPLEX CONTROL SYSTEM (RX, AV)
6
  A/C SYSTEM
7
  TSB EL002-99 Troubleshooting Immobilizer DTC B2795
8
  TSB EL003-99 Troubleshooting Immobilizer DTC B2796
9
  REGISTER THE IMMOBILIZER TO THE ENGINE ECU WITH THE KEY ON BUT ENGINE NOT RUNNING SHORT
TERMINALS Tc & CG IN THE DLC CONNECTOR. LEAVE IT LIKE THIS FOR 30 MIN. (LS430)
                            Note: Not all trouble codes are used on all models
                     DTC on Toyota / Lexus from al tech page (www.alflash.narod.ru/)                 5

  C0215     LR Speed Sensor Circuit (Cel.)
  C0226     ABS Actuator Solenoid Circuit (Cel.) or ABS Solenoid Valve Circuit (MR)
  C0236     ABS Actuator Solenoid Circuit (MR, Cel.)
  C0237     Speed Sensor Circuit (Cel.)
  C0238     Speed Sensor Circuit (Cel.)
  C0239     Speed Sensor Circuit (Cel.)
  C0246     ABS Actuator Solenoid Circuit (MR, Cel.)
  C0256     ABS Actuator Solenoid Circuit (MR, Cel.)
  C0273     ABS Motor Relay Circuit (MR, Cel.)
  C0274     ABS Motor Relay Circuit (MR, Cel.)
  C0278     ABS Motor Relay Circuit (MR, Cel.)
  C0279     ABS Motor Relay Circuit (MR, Cel.)
  C0274     Water Pump Motor Relay Circuit Voltage to High (?)(Cam.)
  C0278     Solenoid Relay Circuit Voltage to Low (Cam.)
  C0279     Solenoid Relay Circuit Voltage to High (Cam.)
  C0371     VSC Sensor Signal or Circuit malfunction
  C1200     Brake Boost Sensor Circuit Malfunction / 98
  C1201     Brake Boost Sensor Circuit Range/Performance (!?)
  C1201     Engine Control System Malfunction (VCS lamp ON-RX3) or ECM/TCM malfunction / 51
  C1203     ECM/TRC communication Circuit malfunction / 53 (RX, LC)
  C1207     Starter Signal block malfunction / 37 (?)
  C1208     Steering Position Sensor Signal or Circuit malfunction / 72
  C1210     No learned (adaptation) VSC Sensor/36
  C1223     Malfunction in ABS Control System (RX3) / 43
  C1224     NEO Signal Circuit Open or Short / 44
  C1231     Steering Angle Sensor Signal or Circuit malfunction (Progr.)
  C1232     Accel. Sensor Signal or Circuit malfunction/32
  C1233     VSC Sensor Circuit Open or Short/33 or Yaw Sensor Circuit Open or Short (Progr., RX3)
  C1234     VSC Sensor Signal Out of Range (malfunction) / 34
  C1235     Speed Sensor Rotor / Right Front (Cel.)
  C1236     Speed Sensor Rotor / Left Front (Cel.)
  C1336     No learned (adaptacion) VSC Sensor/39?
  C1238     Speed Sensor Circuit (MR), Speed Sensor Rotor / Right Rear (Cel.)
  C1239     Speed Sensor Circuit (MR), Speed Sensor Rotor / Left Rear (Cel.)
  C1340     Block Diff. Circuit malfunction/47?
  C1241     IG Power Source Circuit (MR, Cel.)
  C1244     Deceleration Sensor Circuit Open or Short (Progr.)
  C1249     Brake Light Switch Circuit Malfunction (Cam., MR)
  C1251     ABS Pump Motor Lock (MR, Cel.)
  C1271     Low Output Voltage of Right Front Speed Sensor (MR) / 71
  C1272     Low Output Voltage of Left Front Speed Sensor (MR) / 72
  C1273     Low Output Voltage of Right Rear Speed Sensor (MR) / 73
  C1274     Low Output Voltage of Left Rear Speed Sensor (MR) / 74
  C1275     Abnormal Change in Input Voltage of Right Front Speed Sensor (MR) / 75
  C1276     Abnormal Change in Input Voltage of Left Front Speed Sensor (MR) / 76
  C1277     Abnormal Change in Input Voltage of Right Rear Speed Sensor (MR) / 77
  C1278     Abnormal Change in Input Voltage of Left Rear Speed Sensor (MR) / 78
 C1511 -    Torque Sensor Circuit Malfunction (11 / 14)
  C1514
                                                                         10
  C1515     Calibration of torque sensor zero point Not Performed / 15
  C1516     Calibration of torque sensor zero point Not completed / 16
 C1521 11   Power Steering Motor Malfunction / 21 12 (MR2, Pri)
  C1522     Power Steering Motor Malfunction / 22 (MR2, Pri)
  C1523     Power Steering Motor Malfunction / 23 (MR2, Pri)
 C1531 -    Power Steering ECU Malfunction / (31-33) (MR2, Pri)

10
   DTC from the PS warning light.
11
   Avaible Reading and Clearing Diagnostic Trouble Codes Without Scan Tool by using DLC No.3
12
   Read the DTC and Input Signal Check (Test Mode) from the P/S warning light on the combination meter.
For example (courtesy Mr. Serally from Mauritius Island), for Toyota Corolla NZE121 (VIN: JTDBT23E90)
Code 15 - Calibration of torque sensor zero point not performed.
Code 32 - EMPS ECU malfunction
Code 33 - EMPS ECU malfunction
Code 54 - EMPS relay circuit malfunction
                              Note: Not all trouble codes are used on all models
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