Info

If a specific instruction does not appear in a display, it is always possible to proceed by pressing the button After pressing the key > , a selection menu is displayed After the last displayed error, the following instruction appears In the example - press key 1. There then follows the display of the number of errors which are stored (if any). Additional info to every display with key 1 continue temperature sensor 2 Short to ground not present If key 1 is pressed instead of the > key, the...

Test Point 21 Speed Reference Mark Sender

This test can only be performed with an oscilloscope. Connect and adjust a workshop oscilloscope according to the supplied operating instructions for this purpose. Connect the positive tester lead via a test lead on control unit plug terminal 47 and negative tester lead via a test lead on control unit plug terminal 48. Crank engine with the starter motor. Sinusoidal oscillation of at least 3 volts (speed pulse) and an applied higher amplitude (reference mark) must be displayed on the screen. If...

Workshop Manual

PORSCHE Aktiengesellschaft Technical Fault diagnosis, DEE control unit 03 - 1 Connecting into the vehicle - 944 S 03-3 Functional test - actuator and input signal 03 - 7 List of test codes System adaptation List of fault Clearing fault memory Operating conditions for start of diagnosis 03 - 32 Operating instructions for System Tester 9288 03-33 Tightening torques for engine Tolerances and wear Engine, removing and installing Notes on assembly for pistons, from Model 87 onward...

Dme

Operating conditions for start of diagnosis Operating instructions for System Tester 9288 The Systemtester 9288 (BOSCH KTS 301) is a microprocessor-con-trolled self-diagnosis tester. All systems which have a diagnosis interface as per ISO Standard can be tested with this tester. The following tests are possible Reading out the fault memory Sensor and status checks, tire-pressure monitoring (RDK) The Systemtester 9288 is a high-quality piece of electronic equipment In order to prevent damage to...

Test Point 23 Fuel Injectors Injection Timing Vq

Connect voltmeter on injector plug terminal 2 and ground with help of test leads. Turn on ignition. Disconnect 5-pin plug of fuel injector ballast resistors. Connect voltmeter between terminal 3 (terminal sleeve end) and ground. Turn on ignition. If battery voltage is displayed, turn off ignition and pull off all plugs on fuel injectors. Check power flow and resistance between the 5-pin plug of ballast resistors and terminal 2 of each fuel injector plug with an ohmmeter....

Diagnosable DME Control Unit

Self-diagnosis with a fault memory, with which it is possible to detect and store certain injection, ignition and knock regulating system faults, is integrated in the DME control unit of 944 S cars beginning with 1988 models. The DME control unit has a permanent positive connection to prevent cancellation of detected and stored faults by turning off the ignition. Detected faults remain stored in the memory for at least 50 engine starts exception idle speed switch interruption faults . If the...

Assemble cover of centrifugal oil compartment in upper crankcase section

944 Position Valves Tdc

Notes on installation Model 89 onward, Engine type M 44.41 3.0 I Under normal conditions, it is not necessary to remove the cover when overhauling an engine. If the cover is removed, however, the bolt area must be heated with a hot-air blower under all circumstances. Apply Loctite 270 to hexagon head screws. 2.Align dial gage with improvised extension 205 mm long on piston crown cylinder 1 . 3 mm pretension. Align second gage with hydraulic tappet of cylinder 1 intake valve. The dial gage must...