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


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Last edited December 4, 2003.  All material Copyright 2003 Graham Davies.  No liability accepted.