Workshop Manual
Volume I - Engine, 8 valves
DR. ING. h. c. F. PORSCHE Aktiengesellschaft
As webpage by http://www.uriarte.dk/porsche944
12.3.2018
|
Workshop Manual Volume I - Engine, 8 valves DR. ING. h. c. F. PORSCHE Aktiengesellschaft As webpage by http://www.uriarte.dk/porsche944 12.3.2018 |
This Workshop Manual describes all of the important operations for which special instructions are required to assure proper completion. This manual is essential for shop foremen and mechanics, who need this information to keep the vehicles in safe operating condition. The basic safety rules, of course, also apply to repairs on vehicles without exception. Only those repair jobs deviating from those of vehicle type 924 are described in the 944 Workshop Manual. Refer to the 924 Workshop Manual for all other information. The information is grouped according to repair numbers which are identical to the first two digits of the warranty job codes. The repair group index, list of contents and the register tabte are quick guides to find information in the manual. The layout drawings in this manual are numbered in the order of disassembling and, if necessary, also have information on assembly or installation and application of special tools. Descriptions of design and function can be found in the service training course reference material. This Workshop Manual will be kept up to date with Technical Information Bulletins, which will be made part of the manual from time to time. We recommend that these bulletins be filed in the standard type folder provided for this purpose. 
|
|
|
|
|
|
|
|
TECHNICAL DATA (adjusting values and wear limits appear in pertinent repair groups) Note: USA values in brackets.
|
|
|
D i m e n s i o n s (at DIN curb weight)
* Gradients up to 16%
|
F i l l i n g C a p a c i t i e s
* DIN curb weight + 1/2 of payload
|
Technical Data Type 944 - Model 88 (Adjusting values and wear limits appear in pertinent repair groups) Note: USA values in brackets. Engine
|
DESIGNATION OF CYLINDERS 
|
TOLERANCES AND WEAR LlMITS
|
TOLERANCES AND WEAR LlMITS
|
||||||||||||||
TOLERANCES AND WEAR LlMITS
C r a n k s h a f t a n d E n g i n e B l o c k
|
|||||||||||||||||||||||||||||||
|
Tightening torques for engine
|
|||||||||||||||||||||||||
|
|
|
TOOLS 
|
REMOVING AND INSTALLlNG ENGINE ( M a n u a l T r a n s m i s s i o n )
|
|
|
|
I n s t a l l i n g Note the following for installation. 1. First insert transaxle/clutch housing mounting bolts, but do not tighten. N o t e Only tighten mounting bolts to final torque after Hydraulic engine mount and front axle cross member have been mounted. Torque for mounting bolts: 42 Nm (30 ft lb). Front wheel alignment need not be checked after removal and installation of engine. 2. Make sure radiator fits correctly in rubber mounts.
 4. Tighten bolts and nuts to specified torque. 5. Fill and bleed cooling system (see page 19-1).
|
REMOVING AND INSTALLlNG HYDRAULIC ENGINE MOUNTS
|
|
|
CHECKING HYDRAULIC ENGINE BELTS G e n e r a l I n f o r m a t i o n Hydraulic engine mounts cannot be tested 100% with conventional workshop equipment. However, the test procedures listed below can be used to determine whether hydraulic engine mounts are defective or seriously impaired in effectiveness. Of the two hydraulic engine mounts, the one on the right is subjected to greater thermal loading and thus more likely to give cause for complaint. C h e c k i n g Symptoms indicating a damaged engine mount:
|
Installing new hydraulic engine mounts Vehicle type 924 S - 944 - 944 S - 944 S2 - 944 turbo Note
|
|
Polyrib drive belt for alternator or a/c compressor
|
CHECKING ADJUSTMENT OF BALANCE SHAFTS
|
CHECKING AND ADJUSTING TIGHTNESS OF POWER STEERING PUMP DRIVE BELT
|
CALlBRATING SPECIAL TOOL 9201
|
Consequently the measurement with a gage should be repeated with different sliding shoe positions. Find the position, where the scale value is closest to the 4.0 adjusting value. Mark sliding shoe (e.g. with paint or an electric inscriber) and perform the calibra- tion as well as all measurements later at this position.
 5. Recheck after finishing calibration.
|
|
CHECKING AND ADJUSTING TIGHTNESS OF DRIVE BELT FOR BALANCE SHAFTS (ROLLER WITH SLOT) N o t e : Only check and adjust drive belt tightness on a cold engine (ambient temperature approx. 20°C/68°F}.
|
|
Note: Slides must make full-surface contact with belt. While measuring, do not allow the Special Tool to turn or move on the belt.
|
TOOLS  
|
CHECKING AND ADJUSTING TENSION OF DRIVE BELT FOR BALANCE SHAFTS (ROLLER WITH SLOT) Note: Do not check or adjust drive-belt tension unless engine is cold (at room temperature).
|
Illustration shows 16-VALVE ENGINE
|
|
Note: Slides must make full-surface with contact belt. While measuring, do not allow the Special Tool to turn or move on the belt. 
|
TOOLS 
|
TOOLS 
|
Engine Assembly Support Tools 
|
Identification of engine number on crankcase
|
|
||||||||||||||||||||||
|
||||||||||||||||||||
DISASSEMBLlNG AND ASSEMBLlNG CRANKCASE AND CRANKSHAFT SINCE 1985/2 MODELS
|
Notes on assembly Mount the cover of the centrifugal oil compartment in the upper part of the crankcase. Model 89, 2.7 l M 44/11/12 Note It is not usually necessary to remove the cover when overhauling an engine. Should this be necessary, however, always heat the screw area with a hot-air blower. Hexagon head bolts fitted with Loctite 270. Observe the marking on the cover. 
|
CHECKING CRANKSHAFT BEARING CLEARANCE
|
CODES OF CRANKCASE UPPER AND LOWER SECTIONS AS WELL AS BALANCE SHAFT COVER
|
SEALING UPPER AND LOWER CRANKCASE SECTIONS N o t e Only Loctite 574 (orange) should be used as a sealant. Loctite 574 will dry only in conjunetion with metal and exelusion of air. After applying a coat of sealant the bolts should be installed and tightened within 10 minutes, since the sealant on the metal will start to dry. R e m o v i n g O i l S e a l a n t The old sealant does not have to be removed for repairs. It is only necessary to remove grease from the surface, so that after the cleaning solution has dried the new coat of sealant can be applied. The new Loctite will dissolve the old sealant in the surface finish and dry again after assembling. We recommend a fine steel brush or Loctite 80646 adhesive remover for removing old sealant, if this is ever necessary. A p p l y i n g S e a l a n t
|
INSTALLlNG UPPER AND LOWER CRANKCASE SECTIONS
|
INSTALLlNG CRANKSHAFT OIL SEAL (FLYWHEEL END)
|
|
Notes on assembly Aligning the upper and lower parts of the crankcase. Note When assembling, make sure that there is no offset between the crankcase halves on the facing surface (on the oil pump side).
|
|
Refacing the flywheel If severe score or burning marks are evident on the flywheel, the clutch disc mating surtace on the flywheel maybe refaced on a lathe. Remove as little material as possible. Wear limit for flywheel thickness 11.8 mm. 
1 Wear limit 11.8 mm 2 Remove as little material as possible 3 Max. runout 0.05 mm Note for refacing the mating surtace: Surt. roughness + unevenness = 0.008 mm
|
|
REPLACING STUD (REFERENCE MARK SENSOR)
|
SETTING CRANKSHAFT TO TDC IN CYLINDER NO. 1
|
Checking pistons and cylinder bores Motortype M 44.01...10 (2,5 l) 
Note It recommended that the stocks of the relevant tolerance group are checked before machining the cylinders. If necessary, hone to the piston size available. In some cases, certain tolerance groups may be in short supply.
|
Pistons, disassembling and assembling con rods 
|
|
|||||||||||||||||||
PISTON SURVEY 
|
||||||||||||||||||||
INSTALLING PISTON AND CONNECTING ROD C o n n e c t i n g R o d
|
Pistons from Model 89 onward
Checking pistons and cylinder bore Engine type M 44.11/12 (2,7 l)
Note If recommended that the stocks of the relevant tolerance group are checked before machining the cylinders. If necessary, hone to the piston size available. In some cases, certain tolerance groups may be in short supply.
|
|
||||||||||||||||||||
|
||||||||||||||||||||
|
||||||||||||||||||||
REPLACING BEARING SLEEVE FOR COMPENSATING SHAFT BEARING HOUSING
|
|||||||||||||||||||||||
TIGHTENING PROCEDURES FOR CRANKCASE UPPER SECTION ON BALANCE SHAFT HOUSING  N o t e Crankcase upper section and balance shaft housing must be aligned with each other as described below.
|
N o t e Check movement of balance shaft between each tightening step. INSTALLlNG SHAFT SEALS OF BEARING HOUSING N o t e Seals deviate among each other in diameter and on the sealing lip. Code (arrow) faces in turning direction of balance shafts.
Lubricate sealing lips with oil and at same time install with spacer. Then drive in with Special Tool 9202.
|
|||||||||||||||||||||||
INSTALLlNG DRIVE GEARS OF BALANCE SHAFTS N o t e Drive shafts are identical parts.
|
DISASSEMBLlNG AND ASSEMBLlNG BALANCE SHAFT DRIVE 
|
DISASSEMBLlNG AND ASSEMBLlNG COMPENSATING SHAFT DRIVE SINCE 1985/2 MODELS C o m p e n s a t i n g S h a f t s w i t h S e p a r a t e B e a r i n g B r i d g e s 
|
|
||||||||||||||||||||
|
|||||||||||||||||||||
|
||||||||||||||||||||
|
|||||||||||||||||||||
INSTALLlNG BEARING BRIDGES OF COMPENSATING SHAFTS 1985/2 MODELS
|
Note The bearing bridge for the left balance shaft has on oil feed bore for the exhaust turbo- charger. Before installing the balance shaft, it is vital to ascertain that the seal ring is in posi- tion in the take-up bore of the bearing bridge (use grease).  Assembly note Whenever performing repairs on the engine, make sure the seal is replaced.
|
NOTES ON ASSEMBLY '85 MODELS ONWARD ENGINE TYPE M 44.05/06/07/08 TORQUING PROCEDURE, CRANKCASE UPPER HALF - COMPENSATING-SHAFT COVER  Note: When aligning crankcase upper halt and compensating-shaft cover, proceed as follows:
Torquing sequence: see illustration.
|
NOTES ON ASSEMBLY '87 MODELS ONWARD ENGINE TYPE M 44.40/05/06/07/08 TORQUING PROCEDURE, UPPER CRANKCASE HALF/COMPENSATING SHAFT COVER BOLTS (with integrated bearing bridge)  Note: It is imperative to align upper half of crankcase and compensating-shaft cover as follows:
Torquing sequence: see illustration
|
|
|
||||||||||||||||||||
|
||||||||||||||||||
ASSEMBLY NOTES ON SECURING THE PULLEY The pulley (A) without recess must only be installed for old crankshafts without extended journal for accom- modation of the serve pump drive. Pulley (B) with recess for crankshaft with extended journal can also be used on old crankshafts. 
|
||||||||||||||||||||
INSTALLING DRIVE GEARS OF BALANCE SHAFTS ( S i n c e 1 9 8 4 M o d e l s ) N o t e :
|
|
|
MACHINING CYLINDER BORES IN UPPER CRANKCASE SECTION The upper crankcase section is an aluminum alloy product and contains minute particles of pure silicium. In order to have an usable cylinder surface finish, the cylinder bores have to be machined in a manner that the silicium particles protrude out of the aluminum and therefore pistons and piston rings only have contact with the silicium. If it is necessary to machine cylinder bores, they can be restored with a SUNNEN CK - 10/ CV - 616 cylinder repairing machine for installation of oversize pistons.
Single cylinder bores can be machined as required, since pertinent oversize pistons weigh the same as standard pistons. Prior to machining cylinder bores it is recommended to check the stocks on hand for pertinent tolerance groups and, if necessary, to hone the bore for a certain piston size which is available. There could be problems in supplying pistons of certain tolerance groups depending on circumstances. The following procedures are necessary. Rough turning to 0.1 mm before finished size. Dressing to 0.02 mm before finished size. Polishing to finished size. Lapping with Sunnen silicium mixture. 
|
PROCEDURES
 TOOLS
|
H o n i n g P r o c e d u r e s Perform all honing and lapping jobs w i t h o u t the upper dressing guide shoe. The protrusion of the bronze bar on main guide shoe no. 3 has to be eliminated; flush with guide shoe base. S e t t i n g U p M a c h i n e Roughing adjustment table described in column 1. Dressing adjustment table described in column 2. Polishing adjustment tabte described in column 3. Lapping - uncovering the silicium crystals. 1. Set up machine as described in column 4 of test sheet. 2. Thoroughly remove all abrasive residue from previous honing jobs with filtered honing oil. 3. Wipe cylinder bores dry and apply a thin coat of thoroughly mixed silicium mixture. N o t e: If the silicium mixture is too consistent, it can be diluted by adding fresh honing oil and mixing thoroughly. 4. Holders with felt inserts are new placed in the grinding attachment instead of guide shoe and honing stones. Adjusting to the cylinder diameter is made with a gage as for the guide rails and honing stones. 5. Soak felt inserts in filtered honing oil and coat with silicium mixture. 6. Stop grinding oil feed; cylinders are lapped without grinding oil! M a c h i n i n g C y l i n d e r s Guide grinding attachment into bore. Turn feed wheel anticlockwise until felt inserts rest on walls. Start machine and keep turning handwheel anticlockwise until needle of load instrument reaches approx. 20 to 30 %. Now set scale of feed wheel to 20. The machine stops on its own after about 80 seconds. The cylinder surface will new be dull and without gloss. First coat felt inserts with new silicium mixture before going on to the next cylinder. N o t e: If holder with felt inserts are not being used, they must be kept in the storage box to avoid contact with dirt. Never reuse old silicium mixture.
|
|
A chamfer of 0.5 mm x 30° has to be machined on the upper cylinder wall of machined cylinder bores after finishing the honing procedures.  Clean upper and lower crankcase sections thoroughly to remove abrasion residue and silicium pasta prior to assembling.
|
|
TOOLS 
|
|
CHECKING AND ADJUSTING TIGHTNESS OF CAMSHAFT DRIVE BELT N o t e The tightness of the drive belt must only be checked and adjusted on a cold engine (room temperature).
|
|
INSTALLlNG CAMSHAFT DRIVE BELT AND ADJUSTING TIMING
|
|
REMOVING AND INSTALLlNG CYLINDER HEAD R e m o v i n g
|
|
16. Unscrew bolt of intake brace.
|
I n s t a l l i n g
|
Installation instructions Tightening torque specifications for cylinder head as from Model 82 Engine type M44. 01... 10 Applicable in conjunction with 12 mm high nut and new washer
A light film of oil must be applied to the stud threads. As from Model 89 Engine type M 44. 11/12 (2.7 i)
A light film of oil must be applied to the stud threads. 
|
|
TOOLS 
|
DISASSEMBLING AND ASSEMBLING VALVE DRIVE 
|
|
||||||||||||||||||||||
|
||||||||||||||||||||
|
||||||||||||||||||||
DISASSEMBLlNG AND ASSEMBLlNG VALVE TRAIN I n s t a l l i n g C y l i n d e r H e a d N o t e The cylinder head can be removed from an engine in the car, see page 15 - 7.  Tightening sequence (in 3 steps): see figure. Loosening sequence: opposite. Note tightening torque. N o t e Never use any lubricant for the installation of cylinder head nuts and washers. Only give threads of studs a light coat of engine oil. Washers must not turn when tightening cylinder head nuts! Control by making paint marks if necessary. During repairs, the washer can be made reuseable by roughening the bearing surface facing the cylinder head with coarse sandpaper.
|
Grinding Cylinder Head Maling Surface
|
REPLACING VALVE GUIDES TOOLS 
|
REPLACING VALVE GUIDES
|
|
|
|
|
|
Machining Valve Seats Note
|
DISASSEMBLlNG AND ASSEMBLlNG VALVE DRIVE (CAMSHAFT HOUSING) 
|
|
||||||||||||||||||||
|
||||||||||||||||||||
|
||||||||||||||||||||
|
DISASSEMBLlNG AND ASSEMBLlNG CAMSHAFT DRIVE 
|
|
||||||||||||||||||||
Disassembling and assembling camshaft drive Installing camshaft housing Note
Special note on toothed belts and drive belts As a rule. make sure the toothed belts and drive belts are not kinked during assembly, packaging and storage. Improper handling may cauge incipient damage to the camshaft toothed belts and may lead to engine damage.
|
|
|||||||||||||
Adjusting camshaft belt with mechanical belt tensioner Model 87 onward Engine type 44.40/41/05-12 Note
|
|
REPLACING ENGINE OIL AND ENGINE FILTER Requirements: Engine at operating temperature.
|
|
TOOLS  
|
|
|
||||||||||||||||||||||||
|
||||||||||||||||||||||||
|
||||||||||||||||||||
|
||||||||||||||||||||
REMOVING AND INSTALLlNG PARTS OF LUBRICATING SYSTEM
|
DISASSEMBLlNG AND ASSEMBLlNG OIL PUMP 
|
|
||||||||||||||||||||
REMOVING AND INSTALLlNG BUSHING FOR OIL PRESSURE RELIEF VALVE R e m o v i n g
|
TIGHTENING PROCEDURES FOR OIL PAN MOUNTING BOLTS
T i g h t e n i n g s e q u e n c e: clockwise from inside to outside. 
|
TOOLS 
|
CHECKING OIL PRESSURE
|
|
Cleaning the entire engine oil system after an engine fallure (bearing failure)
|
Cleaning the main oil duct in the crankcase Note
|
Removing and instaIling the pressure reducing valve Engine type M 44. 11/12 (2.7 l) 
1 - Fillister head screw 2 - Gasket 3 - Pressure reducing valve 4 - O-ring
|
|
REPLACING COOLANT AND BLEEDING COOLING SYSTEM
|
REPLACING COOLANT AND BLEEDING COOLING SYSTEM (With New Bleeder Adapter)
|
|
REMOVING AND INSTALLlNG PARTS OF COOLING SYSTEM 
|
|
||||||||||||||||||||
|
|||||||||||||||||||||||||||
REMOVING AND INSTALLING PARTS OF COOLING SYSTEM, 187 MODELS ONWARD 
|
|
||||||||||||||||||
|
|
REMOVING AND INSTALLING RADIATOR
|
11. Remove radiator from below. I n s t a l l i n g
|
REMOVING AND INSTALLING TEMPERATURE SWITCH Removing
|
|
|
|
|
CHECKING FUEL PUMP DELIVERY RATE
|
REMOVING AND INSTALLlNG FUEL PUMP
|
REMOVING AND INSTALLING FUEL TANK
|
|
|
FUEL SYSTEM LINE ROUTING - 1985/2 MODELS 
|
ACTIVE CARBON TANK FOR POLLUTANT-FREE FUEL TANK VENTING (LAYOUT) 
|
REMOVING AND INSTALLING FUEL EXPANSION TANK (Since July, 1983)
|
CHECKING FUEL EXPANSION TANK
|
REMOVING AND INSTALLING FUEL LEVEL SENDER TOOLS 
|
REMOVING AND INSTALLING FUEL LEVEL SENDER
|
|
|
TESTING AND ADJUSTING SPECIFICATIONS
|
TESTING AND ADJUSTING SPECIFICATIONS MODELS FROM 85/2 AND 924 S
|
CHECKING FUEL PRESSURE TOOLS 
|
CHECKING FUEL PRESSURE
|
MAKING IDLE ADJUSTMENTS - USA TOOLS  
|
ADJUSTING IDLE SPEED/CO - USA
|
|
CORRECTING CO SETTING ON AIR FLOW SENSOR - USA N o t e
|
REMOVING AND INSTALLING FUEL INJECTORS 
|
||||||||||||||||||||
INSTALLING FUEL INJECTORS
|
Removing and Installing Air Flow Sensor Removing
Installing Clean threads, coat lightly with Loctite No. 270 and tighten screws with 10 Nm (7 ft. Ibs.) torque.
|
|
REMOVING AND INSTALLING FUEL INJECTORS
|
||||||||||||||||||||
InstaIling Fuel injectors Installing Instructions
|
ADJUSTING IDLE SPEED MODELS FROM 85/2 AND 924 S T o o l s 
|
|
|
ADJUSTING IDLE SPEED - USA - AND CATALYTIC CONVERTER CARS, MODELS FROM 85/2 AND 924 S T o o l s 
|
ADJUSTING IDLE SPEED - USA and Catalytic Converter Cars
|
|
|
|
Testing and adjusting specifications Engine type M 44.11/12 (2.7 l)
Note The system fuel pressure has been increased from 2.5 bar to 3.8 bar. The test connection to check the fuel pressure remains the same. Carry out the working procedure CHECKING FUEL PRESSURE as described on Pages 24 - 5 to 24 - 6. Tightening torque for the cap nut 12 Nm.
|
|||||||||||||||||||||||||||||||||||
Adjusting Idle speed and CO As from Model 89 Enginetype M 44. 11/12 (2.7 l) Note Carry out the working procedure ADJUSTING IDLE SPEED/CO as described on Pages 24-17 to 24-23. Vehicles without catalytic converter
Vehicles with catalytic converter
|
Equipment table As from model 89 Engine type M 44 11/12 (2.7 l)
|
|
CHECKING TIGHTNESS OF EXHAUST SYSTEM FLANGES
 Tightening torque for M 8 bolts and nuts: 20 + 2 Nm (2.0 + 0.2 kpm).
|
REPLACING EXHAUST PIPE OR PRIMARY MUFFLER/ CATALYTIC CONVERTER 
|
||||||||||||||||||||
REPLACING EXHAUST PIPE OR PRIMARY MUFFLER / CATALYTIC CONVERTER
|
|
AUTOMATIC CRUISE CONTROL (TEMPOSTAT)
|
AUTOMATIC CRUISE CONTROL (TEMPOSTAT) 
|
|
||||||||||||||||||||
|
||||||||||||||||||||
REMOVING AND INSTALLING CONTROL UNIT FOR CRUISE CONTROL
|
REMOVING AND INSTALLlNG CRUISE CONTROL SWITCH (STEERING COLUMN SWITCH)
|
|
REMOVING AND INSTALLlNG CRUISE CONTROL CABLE
|
|
TROUBLESHOOTING CRUISE CONTROL
|
TESTING MULTIPLE-PIN PLUG FOR CONTROL UNIT FOR CRUISE CONTROL WITH AN OHMMETER
|
|
AUTOMATIC CRUISE CONTROL (TEMPOSTAT) FROM 85/2 MODEL
|
AUTOMATIC CRUISE CONTROL (TEMPOSTAT) FROM 85/2 MODEL 
|
|
|||||||||||||||||||
|
||||||||||||||||||
|
|
|
|
|
|
|
If no defect can located based en these tests, replace control unit.
|
Removing and installing the alternator on vehicles with air-conditioning system
|
|
EQUIPMENT SURVEY I g n i t i o n C a i l
D i s t r i b u t o r (Cap)
S p a r k P l u g s
|
D M E C o n t r o l U n i t
S p a r k P l u g C a p s
|
DANGERS ON ELECTRONIC IGNITION SYSTEMS The Type 944 is equipped with a digital engine electronic system (DME). In comparison to conventional systems the ignition power of DME is so high, that contact with current carrying parts while engine is running could be fatal. Consequently the ignition must always be turned off or battery ground wire disconnected when doing any work on ignition system. Such work would be: 1. Connecting engine testers. 2. Replacing ignition system parts. If DME testing or engine tuning requires turning on the ignition, the dangerous current mentioned above will be in the DME ignition system. Lightning bolts indicate the danger spots in the wiring diagram illustrated below. 
|
|
REMOVING AND INSTALLlNG DISTRIBUTOR CAP
|
|
REPLACING SPARK PLUGS 1. Pull off spark plug caps.
Tightening torque: 25 to 30 Nm (18 to 22 ft lb).
|
D M E ( D I G I T A L E N G I N E E L E C T R O N I C S ) 
|
|
||||||||||||||||||||
|
||||||||||||||||||||
|
||||||||||||||||||||||||||
REMOVING AND INSTALLlNG SPEED AND REFERENCE MARK SENSORS
|
A d j u s t i n g w i t h E n g i n e R e m o v e d
|
TROUBLESHOOTING DME
|
INSTALLATION OF DME COMPONENTS  1. Pressure regulator 2. Fuel distributor 3. Diaphragm damper 4. Ground terminals for DME 5. Speed and reference mark transmitters 6. Control unit (in passenger compartment) 7. Air clcaner 8. Air flow sensor 9. Throttle switch 10. Temperature sensor II (engine temperature) 11. High voltage distributor 12. Fuel injectors 13. Ignition coil
|
 R e l a y f o r F u e l P u m p a n d P o w e r S u p p l y - D M E
|
DME PLUG CONNECTIONS
|
T o p V i e w o f 9 P i n R o u n d P l u g R e c e p t a c l e ( A b o v e B r a k e B o o s t e r )  N o t e : The fuel pump can be run by connecting battery on terminal 4 of the 9-pin plug.
|
|
|
|
TEST POINT 2
|
|
TEST POINT 4 R e f e r e n c e M a r k T r a n s m i t t e r
|
TEST POINT 5 I g n i t i o n S y s t e m
 N o t e : If a defect is displayed for all cylinders, it will be in the primary or secondary circuit from the ignition coil to the distributor rotor. If a defect is displayed for only one cylinder, it will be after the distributor rotor.
|
TEST POINT 6
|
TEST POINT 7 F u e l P r e s s u r e
|
|
|
Start engine. The following oscillographs will be displayed on the oscilloscope when injection timing is correct.
Refer to test point 10 if injection signal does not switch off while decelerating.
|
|
|
TEST POINT 11 C o l d S t a r t E n r i c h m e n t Connect and adjust oscilloscope as described in test point 8 (injection timing). S t a r t E n g i n e The signal displayed on the oscilloscope must be spread, but return immediately to the idle signal. N o t e : The spread signal will be very significant and only visible briefly while starting the engine.
|
|
TESTING LAMBOA SENSOR OPERATION
|
|
REMOVING AND INSTALLING DEE CONTROL UNIT IN MODELS AS OF 85/2
|
|
DME CONTROL UNIT CODING, 924 S '86 MODELS ONWARD
Connect coding plug (1) to plug 1 of wire harness. Connect impedance adapter (2) to plug 2 of wire harness. See Technical Information Gr.2 No. 5/85 dated 11 August, 1986
|
DME CONTROL UNIT CODING, 944 '85/2 MODELS ONWARD
Connect coding plug (1) to plug 1 of wire harness. Connect impedance adapter (2) to plug 2 of wire harness. See Technical Information Gr.2 No. 1/86 dated 20 March, 1986 and Technical Information Gr.2 No. 5/85 dated 11 August, 1986
|
DME control unit coding 944 2.7 l
The coding connector (1) is plugged on to connector 1 in the cableharness. The resistance adapter (2) is plugged on to connector 2 in the cableharness.
|
|
DME CONTROL UNIT CODING, 944 TURBO, '85 MODELS ONWARD
Connect coding plug (1) to plug 1 of wire harness. Connect impedance adapter (2) to plug 2 of wire harness. See Technical Information Gr. 2 No. 5/85 dated 11 August, 1987
|
|
CODING OF DEE CONTROL UNITS, 924 S, '88 MODELS ONWARD
|
CODING OF DEE CONTROL UNITS, 944, '88 MODELS ONWARD
|
Equipment Table Engine type M 44.09/10
Engine type M 44.11/12
|
