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944
Workshop manual
Table Of Contents - Porsche 944 Workshop Manual
Porsche automobile workshop manual
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Also See for 944
:
Workshop manual
(279 pages)
,
Driver manual
(67 pages)
,
Manual
(270 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Table of Contents
Table Of Contents
2
Type 944 S (16-Valve Engines) - '87 Models Onward
4
Technical Data
4
Drive Unit
5
Engine Design
5
Engine Cooling
7
Engine Lubrication
7
Exhaust System
7
Emission Control
7
Fuel System
8
Electrical System
8
Body Designs
9
Dimensions
9
Weights
10
Capacities
11
Performance
11
Climbing Performance
11
Technical Data - Type 944 52 - Model 89
12
Dme Control Unit Error Diagnosis
13
Display
14
Connection In The 944 S
15
Diagnosis Socket In The Car
15
Ignition Off
15
Tester Cable
16
Switch On The Ignition
16
Starting Error Diagnosis
17
Actuator And Input Signal Function Checking
19
Starting Actuator And Input Signal Function Check
19
Test Code List
25
Test Code Components
25
System Adaption
27
Knock Detection
29
Error Possibilities
30
Troubleshooting
31
Error Code 1111
31
Battery Exhausted
31
Error Code 1112
32
Ground Fault
32
Switch Stuck
32
Testing The Idle Contact
32
Error Code 1113
33
Error Code 1114
33
Testing The Full Load Contact
33
Error Code 1121
34
Testing The Power Supply Of The Air-Flow Sensor
35
Testing The Air-Flow Sensor
35
Error Code 1123
36
Error Code 1124
36
Possible Causes For Too Lean A Mixture
36
Possible Causes For Too Rich A Mixture
36
Error Code 1125
37
Error Code 1131
38
Error Code 1132
38
Error Code 1133
39
Error Code 1134
39
Testing The Hall Generator Signal
39
Error Code 1141
40
Testing The Hall Generator's Power Supply
40
Error Code - List
41
Resetting The Error Memory
43
Operating Conditions For Start Of Diagnosis
44
Operating Instructions For System Tester 9288
45
Self-Diagnosis
46
General Information
46
Application
46
Construction
46
System Adaptation
46
Connection
47
Testing
47
Charging With The Battery Charger
47
Reading-Out The Error Memory
47
Circuit Inputs
49
Engine-Knock Registration
50
Service And Wear Parts (Bosch)
51
Service Parts (Porsche)
51
Store Measurement Displays
51
Show Stored Measurement Displays
51
Tightening Torques For Engine (16-Valve)
53
Tolerances And Wear Limits
54
Removing And Installing Engine (16-Valve Engines)
57
Tools
57
Removing And Installing Engine (Manual Transmission)
58
Installing
63
Pistons. '87 Models Onward
65
Checking Pistons And Cylinder Bores
66
Pistons From Model 89 Onwards
67
Checking Pistons And Cylinder Bore
67
Adjusting With Dial Gages
73
Checking Or Adjusting Camshaft Setting For Model 89 Onward
75
Setting
75
Applying The Tdc Mark On The Camshaft Sprocket
76
Tools - Removing And Installing Camshafts And Cylinder Head, Degrees-Of-Turn Method Of Torquing (16-Valve Engines)
77
Removing And Installing Camshafts And Cylinder Head
78
Installing And Tightening The Cylinder Head
82
Installing Camshafts
83
Installing Camshaft Seal
85
Engine Installed
85
Removing And Installing Chain Tensioner
87
Tools - Cylinder Head (16-Valve Engines)
89
Disassembling And Assembling Cylinder Head (16-Valve Engines)
90
Cylinder Head (16 Valves)
92
Removing And Installing Valve Springs
92
Remachining Cylinder-Head Maling Face
94
Checking Cylinder Head For Distortion
94
Remachining Cylinder Head
94
Cylinder Head Refacing Dimension And Identification
94
Removing Valve Stem Seal
95
Installing Valve Stem Seal
96
Checking The Valve Guides
97
Replacing Valve Guides
99
Drawing
100
Replacing The Valve Guides
102
Checking The Valve Seat Wear Limit
104
Checking And Remachining Valve Seats
105
Valve Dimensions
106
Checking And Adjusting Installation Length Of Valve Springs
107
Installation Length
108
Changing Engine Oil And Engine Oil Filter (16-Valve Engines)
109
Removing And Installing The Pressure Reducing Valve
110
Mixing Table For Coolant
111
Checking Heating And Cooling System For Leaks (16-Valve Engines)
111
Engine - Coating
111
Replacing Fuel Filter (16-Valve Engines)
113
Checking Fuel And Injection Lines For Leaks And Loose Connections
113
Fuel Supply
113
Checking Delivery Rate Of Fuel Pump
114
Fuel System Line Routing (16-Valve Engines)
115
Engine Type M 44.40
115
Replacing Air Filter Element (16-Valve Engines)
117
Checking Intake Air Guide And Crankcase Breather Hoses For Leaks And Loose Connections
117
Testing And Adjusting Specifications
118
Checking Fuel Pressure
119
Checking Preconditions
121
Checking Idle Speed And Co - With Catalytic Convertor
121
Idle/Co Adjustment
122
Checking Idle Speed And Co - Without Catalytic Convertor
122
Replacing Air Filter Insert
123
Checking Tightness Of Exhaust System Flanges (16-Valve Engines)
125
Equipment Table
127
Ignition System
127
Dme Control Unit
128
Hall Probe For Knock Sensors
128
Knock Sensor
128
Dme Control Unit Coding, 944 S, '87 Models Onward
129
Replacing Spark Plugs, 944 S
130
Equipment Table, Model 89 Onward
131
Coding - Dee Control Unit 944 S 2, Model 89 Onwards
133
Dme-Diagnosing / Troubleshooting
134
Precautions
136
Important Vehicle Information
137
Equipment Required For Dme Tests
138
Sender Signals Which Can Be Checked With An Oscilloscope
138
Diagnosable Dme Control Unit
139
Tester Connections
139
Power Supply
139
Idle Speed Contact
144
Full Load Contact
145
Air Flow Sensor
147
Oxygen Sensor
150
Control Unit Faulty
152
Hall Signal
152
Tank Venting Valve
154
Fuel Pressure
155
Intake System Leaks
156
Plug Connections
157
Test Point 21: Speed/Reference Mark Sender
158
Test Point 22: Ignition
159
Ignition Timing Test
160
Activation Of High Tension End
160
Ignition Final Stage Control Signal Test
161
Test Point 23: Fuel Injectors - Injection Timing (V/ )
162
Test Point 24: Alternator, Regulator
163
Test Point 25: Leads K And L
163
Alternator / Regulator
163
Coding Of Control Unit - 944 S
165
Coding Af Control Unit - 944 S 2
166
Check-Engine Lamp
167
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Table of Contents
Troubleshooting
Troubleshooting
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DME-Diagnosing / Troubleshooting
134
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This manual is also suitable for:
944 s
944 s2
944 1987
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