(03-10-248) Extended Ignition Discharge Module Diagnosis for Trionic 7

/ 9-5 (9600) / 2004 / 2. Engine / Trionic T7, 4-cyl / Bulletins - SI/MI / (03-10-248) Extended Ignition Discharge Module Diagnosis for Trionic 7

TECHNICAL NEWS
Bulletin Nbr:	03-10-248
Date: ...........	Oktober 2003
Market:	Alla

Extended Ignition Discharge Module Diagnosis for Trionic 7

Cars affected

Saab 9-5 M03- from VIN 33041133 with Trionic 7 engine management system

Background

A newly developed T7 software allows for more precise Tech2 diagnostics of the ignition discharge module. The diagnosis detects absent sparks and inconsistent combinations of knock and combustion signals. The software was introduced into production (9-5 M03) from VIN 33041133.

Parts required

Tech2 ver. 108.000

Procedure

Fault diagnosis, P diagnostic trouble codes

The extended ignition discharge module diagnostics do not generate any P DTCs but are instead a complement to the normal diagnostics. P DTCs must always take priority during fault diagnosis. Always read DTCs according to the normal procedure first and repair or replace according to the fault diagnosis description in WIS.

The following P diagnostic trouble codes relate to the ignition discharge module:

•

P0327 Knock Sensor Circuit. Low Input, Bank 1.

•

P0332 Knock Sensor Circuit. Low Input, Bank 2.

•

P0340 Camshaft Position Sensor. Malfunction.

•

P1310 Ignition Discharge Module. Not Powered, Bank 1.

•

P1312 Combustion Detection Cyl. 1+2. Open Circuit / Short to B+.

•

P1313 Combustion Detection Bank 1. Open Circuit / Short to B+.

•

P1320 Ignition Discharge Module. Not Powered, Bank 2.

•

P1324 Combustion Detection Bank 2. Open Circuit / Short to B+.

•

P1334 Combustion Detection Cyl. 3+4. Open Circuit / Short to B+.

If none of the above DTCs are generated despite a suspected ignition discharge module fault, see “Fault Diagnosis, extended ignition discharge module diagnosis” below.

Fault Diagnosis, extended ignition discharge module diagnosis

Connect Tech2, select T7 and “ Ignition Discharge Module Diagnose” in the menu “ Diagnostic Trouble Codes (DTC)”. If the diagnosis is present in the software, a value/code for “ Current Status”, “ Failure Status” and “ IDM Check Code” are displayed. Additional information explaining “ Current Status” in plain text is displayed in Tech2.

If a value for “ Failure Status” is displayed before the engine is started:

Make a note of the “ Failure Status”. Repair or replace according to the table below. Clear DTCs with Tech2 after work is completed.

If no value for “ Failure Status” is displayed before the engine is started:

Run the diagnostics according to the instructions in the “Information Text” field on the Tech2 screen. If a value for “ Failure Status” is displayed during starter motor cranking, the synchronisation phase or after release of the ignition key back to ON after start attempt, make a note of “ Failure Status”.

Repair or replace according to the table below. Clear DTCs with Tech2 after work is completed.

Description of Tech2 status information

“ Current Status”

A value indicating the current diagnostic procedure phase is displayed here. If the value is 130 or lower, no ignition discharge module fault has yet been detected.

“ Failure Status”

If “ Current Status” indicates a value that is 131 or higher, a fault has been detected that is also displayed as “ Failure Status”. With some exceptions, “ Failure Status” is then stored during 40 warming-up cycles. The function is similar to fault handling for regular P DTCs. “ Failure Status” is cleared during DTC clearing with Tech2.

“ IDM Check Code”

This code is displayed if a fault is detected. A value for “ Failure Status” is also displayed. “ IDM Check Code” contains data from the fault occurrence and car identification. The code is cleared during DTC clearing with Tech2.

“ IDM Check Code” is not currently in use and therefore does not need to be noted.

“Information Text”

In this field, Tech2 displays “ Current Status” in plain text.

“ Current Status”

Value	Meaning
0	Diagnostics not started during this driving cycle.
1-19	Conditions not met for diagnostics before starter motor cranking begun: 1 = P DTC stored 2 = Fuel shut-off 3 = Coolant temperature below 15 °C 4 = Battery voltage below 6.5V 5 = Total number of DTCs is 6 or more
20	Conditions met for diagnostics before starter motor cranking
21-39	Diagnostics interrupted during starter motor cranking: 21 = P DTC stored 22 = Fuel shut-off 23 = Coolant temperature below 15 °C 24 = Battery voltage below 6.5V 25 = Total number of DTCs is 6 or more 26 = Starter motor cranking prematurely interrupted
40	The engine has not started. No ignition discharge module faults detected. Other faults (e.g. fuel system) prevent engine start.
50	The engine has started. No ignition discharge module faults detected.
51-69	Conditions not met for diagnostics before synchronisation: 51 = P DTC stored 52 = Fuel shut-off 53 = Coolant temperature below 15 °C 54 = Battery voltage below 6.5V 55 = Total number of DTCs is 6 or more
70	Conditions met for diagnostics before synchronisation. No ignition discharge module faults detected.
71-89	Diagnostics interrupted during synchronisation: 71 = P DTC stored 72 = Fuel shut-off 73 = Coolant temperature below 15 °C 74 = Battery voltage below 6.5V 75 = Total number of DTCs is 6 or more
90	Engine synchronised. No ignition discharge module faults detected.
91-109	Conditions not met for diagnostics after synchronisation: 91 = P DTC stored 92 = Fuel shut-off 93 = Coolant temperature below 15 °C 94 = Battery voltage below 6.5V 95 = Total number of DTCs is 6 or more 96 = Evaluation of misfire not started
110	Conditions met for diagnostics after synchronisation. No ignition discharge module faults detected.
111-129	Diagnostics interrupted after synchronisation: 111 = P DTC stored 112 = Fuel shut-off 113 = Coolant temperature below 15 °C 114 = Battery voltage below 6.5V 115 = Total number of DTCs is 6 or more
130	All diagnostics completed. No ignition discharge module faults detected.
131-	Faults detected

“ Failure Status”, cars with 4-cyl engine

Diagnostic Trouble Code	Fault	Procedure
Diagnostics during starter motor cranking
173	Fuel shut-off status 12	Possible faulty contact in the module's 10-pin connection. Check and remedy if necessary. If OK: Replace ignition discharge module.
131-134 137-141 144-148 151 152-155 158-162 165-169 172 239-242 245-249 252	Faulty signal from the ignition discharge module	Replace ignition discharge module










Diagnostics during synchronisation
181-184 187-190 193-202	Faulty signal from the ignition discharge module	Replace ignition discharge module


Diagnostics after synchronisation
253	Fuel shut-off status 12	Possible faulty contact in the module's 10-pin connection. Check and remedy if necessary. If OK: Replace ignition discharge module.
211-215 218-221 224-228 231-236 268-271 274 278 279-282 285 289-292 295 299-302 305 309-312 315 319-322 325	Faulty signal from the ignition discharge module	Replace ignition discharge module

“ Failure Status”, cars with V6 engine

Diagnostic Trouble Code	Fault	Procedure
Diagnostics during starter motor cranking
173	Fuel shut-off status 12	Possible faulty contact in the module's 10-pin connection. Check and remedy if necessary. If OK: Replace ignition discharge module 1 or 2 (front or rear).
131-172 207-208 239-252	Faulty signal from the ignition discharge module	Replace ignition discharge module 1 or 2 (front or rear).

Diagnostics during synchronisation
181 183 185 187 189 191 193 194 203	Faulty signal from the ignition discharge module	Replace ignition discharge module, rear bank








182 184 186 188 190 192 195 196 204	Faulty signal from the ignition discharge module	Replace ignition discharge module, front bank








197-199	Faulty signal from both ignition discharge modules	Replace both ignition discharge modules
Diagnostics after synchronisation
213 215 217 219 221 223 226 228 230 234 236 238 257 260 263 266 276 280 282 284 287 290 294 297 300 302 304 307 310 312 314 317 320 322 324 327	Faulty signal from the ignition discharge module	Replace ignition discharge module, front bank


















211 224 231 232 274 285 295 305 315 325	Engine not synchronised, not possible to determine the faulty bank	Replace ignition discharge module 1 or 2 (front or rear).









258 261 264 267 277 278 288 298 308 318 328	Faulty signal from both ignition discharge modules	Replace both ignition discharge modules










212 214 216 218 220 222 225 227 229 233 235 237 256 259 262 265 275 279 281 283 286 289 291 293 296 299 301 303 306 309 311 313 316 319 321 323 326	Faulty signal from the ignition discharge module	Replace ignition discharge module, rear bank

(03-10-248) Extended Ignition Discharge Module Diagnosis for Trionic 7

“ Current Status”

“ Failure Status”

“ IDM Check Code”

“Information Text”

“ Current Status”

“ Failure Status”, cars with 4-cyl engine

“ Failure Status”, cars with V6 engine

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