DIAGNOSIS FUNCTION


ENGINE WARNING LAMP (CHECK ENGINE LAMP)/GLOW INDICATOR LAMP

If an abnormality occurs in any of the following items related to the unit injection engine control system, the engine warning lamp or glow indicator lamp will illuminate.
If the lamp remains illuminated or if the lamp illuminates while the engine is running, check the diagnosis code output.

ENGINE WARNING LAMP AND GLOW INDICATOR LAMP INSPECTION ITEMS
Refer to , Inspection Chart For Diagnosis Code.

METHOD OF READING AND ERASING DIAGNOSIS CODES
Refer to , GROUP 00 - How to Use Troubleshooting/Inspection Service Points - Diagnosis Function.

INSPECTION USING M.U.T.-III DATA LIST AND ACTUATOR TESTING
1.Carry out inspection by means of the data list and the actuator test function, if there is an abnormality, check and repair the chassis harness and components.
2.After repairing, re-check using the M.U.T.-III and check that the abnormal input and output have returned to normal as a result of the repairs.
3.Erase the diagnosis code memory.
4.Remove the M.U.T.-III, and then start the engine again and carry out a road test to confirm that the problem has disappeared.

FREEZE FRAME DATA
When the engine-ECU detects a malfunction and stores a diagnosis code, it also stores a current status of the engine. This function is called "Freeze frame data". By analyzing this "Freeze frame" data with the M.U.T.-III, an effective troubleshooting can be preformed. The freeze frame data shows the items selected from the list shown below in accordance with the diagnosis code.
Item No.
 Item name
 Unit
4
 Accumulated minute timer
 min
17
 Current error type
 -
21
 Engine coolant temperature sensor
 °C
23
 Engine speed
 r/min
24
 DTC read counter
 Times
46
 Error type debounced
 -
54
 Frequency counter
 Times
55
 Target boost pressure
 hPa
59
 Ignition cycle counter
 Times
64
 Mileage at last occurrence
 km
102
 Brake switch (Stop lamp switch)
 -
171
 Boost pressure sensor
 hPa
245
 A/C selected
 -
246
 Accelerator pedal (main)
 %
247
 Accelerator pedal (sub)
 %
248
 Ambient air temperature from CAN
 °C
251
 Clutch interlock switch
 -
252
 Clutch upstop switch
 -
254
 Cruise control governor active not OFF
 -
255
 Driver overrides active cruise control
 -
256
 Driver requested engine torque
 N·m
257
 EGR output
 %
259
 Main switch cruise indicator
 -
260
 Mass air flow actual
 kg/h air
261
 Redundant brake switch
 -
262
 Static engine torque
 N·m
265
 Ignition switch (IG1)
 -
266
 Vehicle speed from CAN
 km/h
272
 Dutycycle below allowed minimum
 -
276
 Can signal - vehicle speed invalid
 -
277
 Air mass ratio (threshold high)
 -
278
 Air mass ratio (threshold low)
 -
279
 Beginning of injection period of solenoid valve (No. 1 cylinder below limit)
 -
280
 Beginning of injection period of solenoid valve (No. 2 cylinder below limit)
 -
281
 Beginning of injection period of solenoid valve (No. 3 cylinder below limit)
 -
282
 Beginning of injection period of solenoid valve (No. 4 cylinder below limit)
 -
283
 Variable geometry position sensor fault
 -
287
 Configuration not valid
 -
288
 Data variant not valid
 -
289
 Default value used
 -
290
 Deviation (accelerator pedal position sensor main/sub) voltage high
 -
291
 Differential pressure signal
 -
292
 Engine control mode not plausible
 -
293
 Engine oil pressure too low
 -
295
 Last read operation error
 -
296
 Last write operation error
 -
297
 Plausibility error signal of ignition switch-IG
 -
298
 Error path jammed valve for EGR
 -
299
 Error path of drift error
 -
300
 EGR valve position sensor error
 -
301
 No. 1 exhaust gas temperature sensor error
 -
302
 Throttle position sensor error
 -
303
 Engine-ECU not written (code word)
 -
304
 VIN writing incompleted
 -
306
 Excess temperature
 -
307
 Exhaust gas temperature after DPF monitor
 -
308
 Fast decay error
 -
309
 Decay error (cylinder)/short circuit to earth
 -
310
 No load/excess temperature (swirl control solenoid valve)
 -
311
 Short circuit to battery (swirl control solenoid valve)
 -
312
 Short circuit to earth (swirl control solenoid valve)
 -
313
 Oxygen concentration error
 -
314
 Bus off Bus 1
 -
317
 Error (intake manifold)
 -
318
 Fault path to CAN message A/C
 -
319
 Fault path to CAN message ABS/ASC
 -
320
 Diagnosis transmission/protocol error
 -
321
 Exhaust gas temperature pre turbine monitoring
 -
322
 Flow resistance monitoring
 -
323
 Fuel temperature sensor signal implausibility
 -
324
 Function code not valid
 -
325
 Glow plug defect/not connect
 -
326
 Hose line defective
 -
327
 Hardware signal (vehicle speed) invalid
 -
329
 Jammed valve detection
 -
330
 Engine control relay does not open in time
 -
331
 Engine control relay opens too early
 -
332
 Minimum temperature/temperature no reached
 -
333
 Air/fuel ratio sensor heater power stage
 -
334
 Air/fuel ratio sensor nernst cell pin
 -
335
 Air/fuel ratio sensor oxygen voltage calibration value
 -
336
 Air/fuel ratio sensor pump current pin
 -
337
 Air/fuel ratio sensor virtual ground pin
 -
338
 Negative governor deviation below limit
 -
339
 No crankshaft signal
 -
340
 No load
 -
341
 Not plausible fault
 -
342
 Barometric pressure sensor implausibility
 -
343
 Recognized misfire (above limit)
 -
344
 Offset (camshaft/crankshaft)
 -
345
 Engine oil pressure switch position not plausible
 -
346
 Exhaust differential pressure sensor
 -
347
 No. 3 exhaust gas temperature sensor
 -
348
 No. 2 exhaust gas temperature sensor
 -
349
 DPF regeneration strategy fail
 -
350
 Plausibility check (No. 1 exhaust gas temperature sensor)
 -
352
 Positive governor deviation above limit
 -
353
 Ri value monitor of air/fuel ratio sensor
 -
354
 Exhaust gas temperature pre DPF monitoring
 -
355
 Short circuit to battery
 -
356
 Short circuit to earth
 -
357
 Short circuit on lower stop to battery
 -
358
 Short circuit/over current
 -
359
 Short circuit to battery
 -
361
 Signal error only in case of CAN
 -
362
 Vehicle speed invalid injection mass/engine speed
 -
363
 Vehicle speed invalid overrun
 -
367
 Line error
 -
368
 Line error (initialise failed)
 -
370
 Solenoid valve (No. 1 cylinder) exceed max negative deviation
 -
371
 Solenoid valve (No. 1 cylinder) exceed max positive deviation
 -
372
 Solenoid valve (No. 2 cylinder) exceed max negative deviation
 -
373
 Solenoid valve (No. 2 cylinder) exceed max positive deviation
 -
374
 Solenoid valve (No. 3 cylinder) exceed max negative deviation
 -
375
 Solenoid valve (No. 3 cylinder) exceed max positive deviation
 -
376
 Solenoid valve (No. 4 cylinder) exceed max negative deviation
 -
377
 Solenoid valve (No. 4 cylinder) exceed max positive deviation
 -
378
 Supply voltage missing
 -
379
 Adaptive cruise control permanent high
 -
380
 Voltage above upper limit
 -
381
 Voltage below lower limit
 -
382
 Wrong crank angle sensor signal
 -