Diagnostic Trouble Code Chart

HINT:

• Using SST 09843-18040, connect terminals TC and CG of the DLC3.
• If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For details of each code, refer to the DTC chart below.
  Fig 1: Diagnostic Trouble Code Information Chart

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  DIAGNOSTIC TROUBLE CODE
  
  

  DTC No. (Refer To)	Circuit Inspection	Trouble Area
  DTC P0500/21: VEHICLE SPEED SENSOR CIRCUIT, DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH	Vehicle speed sensor "A"	Combination meter Vehicle speed sensor Vehicle speed sensor signal circuit ECM
  DTC P0500/21: VEHICLE SPEED SENSOR CIRCUIT, DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH	Vehicle speed sensor "A" Intermittent/Erratic/High
  DTC P0571/52: BRAKE SWITCH "A" CIRCUIT	Brake switch "A" circuit	Stop lamp switch Stop lamp switch signal circuit ECM
  DTC P0607/54: CONTROL MODULE PERFORMANCE	Control module performance	ECM (This DTC indicates a malfunction in the ECM. When this DTC is output, it is necessary to replace the ECM.)
  DTC P1615/61: COMMUNICATION ERROR FROM DISTANCE CONTROL ECU TO ECM	Communication error from distance control ECU to engine ECU	Communication circuit Cruise control ECU (Distance control ECU) ECM
  DTC P1616/62: COMMUNICATION ERROR FROM ECM TO DISTANCE CONTROL ECU	Communication error from engine ECU to distance control ECU
  DTC U0122/64: LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE	Lost communication with vehicle dynamics control module	Communication circuit ABS & traction actuator assy (Skid control ECU) ECM
  DTC U0100/65: LOST COMMUNICATION WITH ECM/PCM	Lost communication with ECM/PCM
  DTC P1575/66: WARNING BUZZER MALFUNCTION	Warning buzzer malfunction	VSC system (Buzzer active test) Skid control buzzer assy Skid control buzzer circuit ABS & traction actuator assy (Skid control ECU)
  (1)DTC P1578/69: MALFUNCTION IN BRAKE SYSTEM	Brake system malfunction	VSC system
  DTC U0235/71: COMMUNICATION ERROR FROM LASER RADAR SENSOR TO DISTANCE CONTROL ECU	Communication error from laser radar sensor to distance control ECU	Communication circuit Laser radar sensor Cruise control ECU (Distance control ECU)
  DTC U0235/72: COMMUNICATION ERROR FROM DISTANCE CONTROL ECU TO LASER RADAR SENSOR	Communication error from distance control ECU to laser radar sensor
  DTC P1570/73: LASER RADAR SENSOR MALFUNCTION	Laser sensor malfunction	Laser radar sensor
  DTC P1572/75: IMPROPER AIMING OF LASER RADAR SENSOR BEAM AXIS	Improper aiming of laser sensor beam axis
  DTC P0571/76: BRAKE SWITCH "A" CIRCUIT	Brake switch "A" circuit	BRK relay BRK relay circuit ABS & traction actuator assy (Skid control ECU)
  (1) When DTC P1578 (69) is output, check for the DTCs on the skid control ECU in the diagnosis mode. Only when any code is output, inspect the trouble area based on following the DTC.