Hybrid Vehicle ECU Diagnostic Trouble Codes In addition to the letter-plus-four-digit DTC, the HV-ECU generates "information codes" consisting of three digits. These give a more finely detailed definition of the problem. They can be retrieved by the THHT (Toyota Hand-Held Tester) but not by a normal OBD-II scanner. How the THHT retrieves information codes has not been determined, therefore they cannot be retrieved by the Prius Mini-Scanner. From pages DI-199 through to DI-205, in the Hybrid Vehicle Control System chapter of the Repair Manual. B2799 - Immobilizer Malfunction 101 No input of signal from transponder key ECU C2692 - Regenerative Brake Check 102 Regenerative Brake Check C2693 - Regenerative Brake Check 103 Regenerative Brake Check P1120 - Accelerator Pedal Position Sensor Circuit Malfunction This DTC has been caught in the wild on an early 2001 model year Prius. The accelerator pedal position sensor is know to cause problems on these cars and there is a TSB out on it. 104 Open or short circuit in main accelerator sensor circuit 105 +B short in main accelerator sensor circuit 106 Main sensor internal error 107 Open or short in sub accelerator sensor circuit 108 +B short in sub accelerator sensor circuit 109 Sub sensor internal error 110 When difference between main sensor value and sub sensor value is large 111 When sub sensor value changes while main sensor value does not 112 When main sensor value changes while sub sensor value does not 113 When any of information code 104-112 continues to appear 114 Accelerator pedal not smoothly returning to original position P1520 - Stop Light Switch (Cruise Control System) Malfunction 115 Open or short in stop light switch circuit P1566 - Cruise Control System Malfunction 116 When STP signal of HV ECU is inconsistent with that of brake ECU, with cruise control indicator ON P1600 - BATT Malfunction 117 HV ECU back-up power source circuit malfunction P1780 - Park/Neutral Position Switch System Malfunction 118 When more than 2 main signals are ON 119 When main signal is not turned ON even though sub signal has been input 120 Open or short in sub sensor circuit 121 When shift position detected by main signal is different from that detected by sub signal P3000 - HV Battery Malfunction 123 Input of abnormal signal from battery ECU (HV Battery System Malfunction) 124 Input of abnormal signal from battery ECU (high voltage fuse blown out) 388 Discharge Inhibition Control Malfunction. When charged battery is low due to leaving the vehicle in N position, gas shortage or HV system malfunction 389 Drop of high voltage. When main battery is dead or main battery is dead due to HV system malfunction P3001 - HV Battery ECU Malfunction 129 Battery ECU malfunction P3004 - Power Cable Malfunction 130 HV Battery Malfunction. When HV battery voltage becomes lower than inverter voltage 131 Power Cable Malfunction. When main fuse is blown out, service plug is disconnected or limiter resistance is cut off 133 HV Battery Malfunction. When inverter voltage sensor is malfunctioning or limiter resistance value increases P3100 - HV ECU Malfunction 127 IB Circuit Malfunction. +B short in IB terminal circuit of HV ECU 128 IB Circuit Malfunction. Open or short in IB terminal circuit of HV ECU 134 HV ECU Internal Error 135 HV ECU Internal Error 136 GO Signal Error. Open or short in GO circuit 137 Engine Speed Sensor Malfunction 138 IB Circuit Malfunction. When the difference between current of HV ECU and current of battery is large 139 HV ECU internal error. IG Signal Circuit Malfunction 140 HV ECU internal error. RAM Braked 141 HV ECU internal error. ROM Braked 142 ST Signal Circuit Malfunction. When ST signal of HV ECU is ON, with ignition switch turned OFF 143 HV ECU internal error. Immobilizer Malfunction 144 HV ECU internal error. Primary Check Malfunction 145 HV ECU internal error. Primary Check Malfunction 146 HV ECU internal error. Primary Check Malfunction 147 HV ECU internal error. Primary Check Malfunction 148 HV ECU internal error. HV CPU Malfunction 149 HV ECU internal error. HV CPU Malfunction 150 HV ECU internal error. Motor CPU Malfunction 151 HV ECU internal error. Motor CPU Malfunction 152 HV ECU internal error. Motor CPU Malfunction 153 HV ECU internal error. Motor CPU Malfunction 154 HV ECU internal error. Motor CPU Malfunction 155 HV ECU internal error. Motor CPU Malfunction 156 HV ECU internal error. Motor CPU Malfunction 157 HV ECU internal error. Motor CPU Malfunction 158 HV ECU internal error. Motor CPU Malfunction 159 HV ECU internal error. Motor ECU Communication Circuit Malfunction 160 HV ECU internal error. Motor ECU Communication Circuit Malfunction 161 HV ECU internal error. Motor ECU Power Source Malfunction 162 HV ECU internal error. Motor ECU Power Source Malfunction 163 HV ECU internal error. Motor ECU Power Source Malfunction 164 HV ECU internal error. Motor ECU Power Source Malfunction 165 HV ECU internal error. Motor ECU Power Source Malfunction 166 HV ECU internal error. Motor R/D Malfunction 167 HV ECU internal error. Motor R/D Malfunction 168 HV ECU internal error. Motor R/D Malfunction 169 HV ECU internal error. Motor R/D Malfunction 170 HV ECU internal error. Motor R/D Malfunction 171 HV ECU internal error. Motor REF Signal Malfunction 172 HV ECU internal error. Motor REF Signal Malfunction 173 HV ECU internal error. Motor REF Signal Malfunction 174 HV ECU internal error. Motor Inverter Current Sensor Malfunction 175 HV ECU internal error. Motor Inverter Current Sensor Malfunction 176 HV ECU internal error. Motor Gate Shutdown Signal Line Connection Malfunction 177 HV ECU internal error. Motor Main CPU Malfunction 178 HV ECU internal error. Motor Main CPU Malfunction 179 HV ECU internal error. Motor Main CPU Malfunction 180 HV ECU internal error. Rotation Angle Check CPU Malfunction 181 HV ECU internal error. Rotation Angle Check CPU Malfunction 182 HV ECU internal error. Rotation Angle Check CPU Malfunction 183 HV ECU internal error. Rotation Angle Check CPU Malfunction 184 HV ECU internal error. Rotation Angle Check CPU Malfunction 185 HV ECU internal error. Rotation Angle Check CPU Malfunction 186 HV ECU internal error. Rotation Angle Check CPU Malfunction 187 HV ECU internal error. Important RAM Malfunction 188 HV ECU internal error. Generator CPU Malfunction 189 HV ECU internal error. Generator CPU Malfunction 190 HV ECU internal error. Genarator CPU Malfunction 191 HV ECU internal error. Generator CPU Malfunction 192 HV ECU internal error. Generator CPU Malfunction 193 HV ECU internal error. Generator CPU Malfunction 194 HV ECU internal error. Generator CPU Malfunction 195 HV ECU internal error. Generator CPU Malfunction 196 HV ECU internal error. Generator CPU Malfunction 197 HV ECU internal error. Generator R/D Malfunction 198 HV ECU internal error. Generator R/D Malfunction 199 HV ECU internal error. Generator R/D Malfunction 200 HV ECU internal error. Generator R/D Malfunction 201 HV ECU internal error. Generator R/D Malfunction 202 HV ECU internal error. Generator R/D Malfunction 203 HV ECU internal error. Generator Shutdown Signal Line Connection Malfunction 271 HV ECU internal error. Motor PWN Line Connection Malfunction 310 HV ECU internal error. Generator PWN Line Connection Malfunction 390 HV ECU internal error. Charge Inhibition Control Malfunction 391 HV ECU internal error. Motor CPU malfunction 392 HV ECU internal error. Motor CPU malfunction 393 HV ECU internal error. HV CPU Operation Malfunction P3101 - Engine System Malfunction 204 Input of abnormal signal from the ECM (abnormal engine output) 205 Input of abnormal signal from the ECM (engine unable to start) 238 Transaxle Malfunction. When engine does not start even though cranking it P3105 - Battery ECU Communication Circuit Malfunction 206 When communication between battery ECU and HV ECU is abnormal 1 sec. after ignition is turned ON 207 When communication between battery ECU and HV ECU is abnormal 1 sec. after ignition is turned ON 208 When communication between battery ECU and HV ECU is abnormal 1 sec. after ignition is turned ON P3106 - ECM Communication Circuit Malfunction 209 When communication between ECM and HV ECU is abnormal 1 sec. after ignition is turned ON 210 When communication between ECM and HV ECU is abnormal 1 sec. after ignition is turned ON 211 When communication between ECM and HV ECU is abnormal 1 sec. after ignition is turned ON 212 Input of abnormal signal from ECM 394 When ECM does not operate P3107 - Airbag ECU Communication Circuit Malfunction 213 When communication between airbag ECU and HV ECU is abnormal 10 sec. after ignition is turned ON 214 When communication between airbag ECU and HV ECU is abnormal 10 sec. after ignition is turned ON 215 When communication between airbag ECU and HV ECU is abnormal 10 sec. after ignition is turned ON P3108 - A/C Amplifier Communication Circuit Malfunction 216 When communication from A/C amplifier to HV ECU is abnormal 217 When communication from A/C amplifier to HV ECU is abnormal P3109 - Brake ECU Communication Circuit Malfunction 218 When communication between brake ECU and HV ECU is abnormal 1.5 sec. after ignition is turned ON 219 When communication between brake ECU and HV ECU is abnormal 1.5 sec. after ignition is turned ON 220 When communication between brake ECU and HV ECU is abnormal 1.5 sec. after ignition is turned ON 221 When communication between brake ECU and HV ECU is abnormal 1.5 sec. after ignition is turned ON 222 When abnormal data is received from brake ECU P3110 - IGCT Relay Malfunction 223 When IGCT relay is always closed P3115 - System Main Relay Malfunction 224 SMR Cont 1 Malfunction. Open or +B short in system main relay No. 1 circuit 225 SMR Cont 1 Malfunction. Short in system main relay No. 1 circuit 226 SMR Cont 2 Malfunction. Open or +B short in system main relay No. 2 circuit 227 SMR Cont 2 Malfunction. Short in system main relay No. 2 circuit 228 SMR Cont 3 Malfunction. Open or +B short in system main relay No. 3 circuit 229 SMR Cont 3 Malfunction. Short in system main relay No. 3 circuit 231 Deposit of SMR. System main relay + terminal deposited 232 Deposit of SMR. System main relay - terminal deposited 233 Deposit of SMR. System main relay + & - terminal deposited P3120 - HV Transaxle Malfunction 234 Energy Balance Malfunction. Small reduction of motor magnetism 235 Energy Balance Malfunction. Large reduction of motor magnetism 236 Energy Balance Malfunction. Small reduction of generator magnetism 237 Energy Balance Malfunction. Large reduction of generator magnetism 239 HV Transaxle Malfunction. Shaft damaged 240 HV Transaxle Malfunction. Generator locked 241 HV Transaxle Malfunction. Torque limiter sliding 242 HV Transaxle Malfunction. Planetary gear locked 243 Motor Resolver Malfunction. Motor resolver inter-phase short 244 Motor Resolver Malfunction. Motor resolver inter-phase short (When there is a history that the state of malfunction continued during inverter fail safe mode) 245 Motor Resolver Malfunction. Open or short in motor resolver circuit 246 Motor Resolver Malfunction. Open or short in motor resolver circuit (When there is a history that the state of malfunction continued during inverter fail safe mode) 247 Motor Temperature Sensor Malfunction. GND short in motor temperature sensor 248 Motor Temperature Sensor Malfunction. Motor temperature sensor malfunction 249 Motor Temperature Sensor Malfunction. Open or +B short in motor temperature sensor 250 Motor Temperature Sensor Malfunction. Motor temperature sensor performance problem 253 Generator Resolver Malfunction. Generator resolver inter-phase short 254 Generator Resolver Malfunction. Generator resolver inter-phase short (When there is a history that the state of malfunction continued during inverter fail safe mode) 255 Generator Resolver Malfunction. Open or short in generator resolver circuit 256 Generator Resolver Malfunction. Open or short in generator resolver circuit (When there is a history that the state of malfunction continued during inverter fail safe mode) 257 Generator Temperature Sensor Malfunction. GND short in generator temperature sensor 258 Generator Temperature Sensor Malfunction. Generator temperature sensor malfunction 259 Generator Temperature Sensor Malfunction. Open or +B short in generator temperature sensor 260 Generator Temperature Sensor Malfunction. Generator temperature sensor performance problem P3125 - Converter & Inverter Assembly Malfunction 263 DC/DC Converter Malfunction. +B short in DCDC converter NODD wiring 264 DC/DC Converter Malfunction. DCDC converter malfunction 265 DC/DC Converter Malfunction. Open or GND short in DCDC converter NODD wiring 266 VM Malfunction. Open or GND short in inverter voltage signal circuit 267 VM Malfunction. +B short in inverter voltage signal circuit 268 VM Malfunction. Inverter voltage signal is inconsistent with battery voltage 269 VM Malfunction. Inverter voltage sensor malfunction 270 VM Malfunction. Abnormality of line connection of inverter foltage signal circuit (When there is a history that the state of malfunction continued during inverter fail safe mode) 272 Motor PWN Line Connection Malfunction. Abnormality of the line connection of motor PWM (When there is a history that the state of malfunction continued during inverter fail safe mode) 273 Motor Inverter Gate Malfunction. Motor inverter malfunction 274 Motor Inverter Temperature. Open or +B short in motor inverter temperature sensor 275 Motor Inverter Temperature. GND short in motor inverter temperature sensor 276 Sensor Malfunction. Motor inverter temperature sensor malfunction 277 Sensor Malfunction. Motor inverter temperature sensor performance problem 278 Motor Inverter Sinv. +B short in motor inverter stop signal circuit 279 Motor Inverter Sinv. Over voltage of inverter 280 Motor Inverter Sinv. Open or GND short in motor inverter stop signal circuit 281 Motor Inverter Sinv. Voltage drop of inverter power source 282 Motor Inverter Sinv. Inverter circuit broken 283 Motor Inverter Finv. +B short in motor inverter fail signal circuit 284 Motor Inverter Finv. Inverter overheating 285 Motor Inverter Finv. Open or GND short in motor inverter fail signal circuit 286 Motor Inverter Finv. Inverter circuit broken 287 Motor Inverter Finv. Inverter internal short 288 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor malfunction (V phase sub sensor) 289 Motor Inverter Current Sensor Malfunction. Open in inverter current sensor (V phase sub sensor) 290 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor malfunction (V phase main sensor) 291 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 292 Motor Inverter Current Sensor Malfunction. Open in motor inverter current sensor (V phase main sensor) 293 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 294 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor V phase performance problem 295 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 296 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor malfunction (W phase sub sensor) 297 Motor Inverter Current Sensor Malfunction. Open in motor inverter current sensor (W phase sub sensor) 298 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor malfunction (W phase main sensor) 299 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 300 Motor Inverter Current Sensor Malfunction. Open in motor inverter current sensor (W phase main sensor) 301 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 302 Motor Inverter Current Sensor Malfunction. Motor inverter current sensor W phase performance problem 303 Motor Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 304 Motor Gate Shutdown Signal Line Connection Malfunction. +B short in motor gate shutdown signal circuit 305 Motor Gate Shutdown Signal Line Connection Malfunction. Open or GND short in motor gate shutdown signal circuit 306 Failure in Monitoring Motor Torque Performance. 307 Abnormal Current Value of Motor 308 Detection of Collision Signal 309 Motor PWM Line Connection Malfunction. Open or short in generator inverter switching wiring (GUU, GVU, GWU) 311 Generator Inverter Malfunction 312 Generator Inverter Temperature Sensor Malfunction. Open or +B short in generator inverter temperature sensor 313 Generator Inverter Temperature Sensor Malfunction. GND short in generator inverter temperature sensor 314 Generator Inverter Temperature Sensor Malfunction. Generator inverter temperature sensor malfunction 315 Generator Inverter Temperature Sensor Malfunction. Generator inverter temperature sensor performance problem 316 Generator Inverter Sinv. +B short in generator inverter stop signal circuit 317 Generator Inverter Sinv. Over voltage of inverter 318 Generator Inverter Sinv. Open or GND short in generator inverter stop signal circuit 319 Generator Inverter Sinv. Voltage drop of inverter power source 320 Generator Inverter Sinv. Inverter circuit broken 321 Generator Inverter Finv. +B short in generator inverter fail signal circuit 322 Generator Inverter Finv. Inverter overheating 323 Generator Inverter Finv. Open or GND short in generator inverter fail signal circuit 324 Generator Inverter Finv. Inverter circuit broken 325 Generator Inverter Finv. Inverter internal short 326 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor malfunction (V phase sub sensor) 327 Generator Inverter Current Sensor Malfunction. Open in generator inverter current sensor (V phase sub sensor) 328 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor malfunction (V phase main sensor) 329 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 330 Generator Inverter Current Sensor Malfunction. Open in generator inverter current sensor (V phase main sensor) 331 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 332 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor V phase performance problem 333 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 334 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor malfunction (W phase sub sensor) 335 Generator Inverter Current Sensor Malfunction. Open in generator inverter current sensor (W phase sub sensor) 336 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor malfunction (W phase main sensor) 337 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 338 Generator Inverter Current Sensor Malfunction. Open in generator inverter current sensor (W phase main sensor) 339 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 340 Generator Inverter Current Sensor Malfunction. Generator inverter current sensor W phase performance problem 341 Generator Inverter Current Sensor Malfunction. (when there is a history that the state of malfunction continued during inverter fail safe mode) 342 Motor Gate Shutdown Signal Line Connection. +B short in generator gate shutdown signal 343 Motor Gate Shutdown Signal Line Connection. Open or GND short in generator gate shutdown signal circuit 344 Failure in Monitoring Generator Torque Performance 345 Abnormal Current Value of Generator P3130 - Inverter Cooling System Malfunction 346 Water pump system malfunction 347 Electric cooling fan system malfunction P3135 - Circuit Breaker Sensor Malfunction 348 GND short in circuit breaker sensor 349 Open or +B short in circuit breaker sensor P3140 - Interlock Malfunction You can make this DTC happen quite easily and safely by removing the service plug from the main battery and turning the car on. 350 Safety devices operating with vehicle is stopped (ILK signal ON) 351 Open circuit in interlock signal circuit while vehicle is running P3145 - Vehicle Speed Sensor Circuit Malfunction 352 No input of vehicle speed signal during cruise control driving http://prius.ecrostech.com/GenInfo/DTCs/HVECU.htm
