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GENERAL ENGINE INFORMATION 1A1-9
COMPRESSION PRESSURE TEST
1 Compression Pressure Tester
2 Diagram Sheet3 Adaptor
4 Sealing Cone
Tools Required
001 589 76 21 00 Compression Pressure Tester
119 589 01 09 00 Spark Plug Wrench Standard Service Data
Compression Ratio
Normal Engine TemperatureNormal Compression Pressure Permissible Pressure Difference Between Individual Cylinders
10 : 180°C
Min. 10 bar, Max. 14 bar
Min. 6 bar, Max. 10 bar Max. 1.5 bar
General Fuel Optimization
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1A1-10 GENERAL ENGINE INFORMATION Measuring Procedure
1. Warm the engine up to normal operating temperature.
2. Remove the spark plugs.
3. Place the diagram sheet to compression pressuretester.
4. Connect the adaptor to compression pressure tester and install it into the spark plug hole.
5. Crank the engine approx. eight revolutions by using the start motor.
6. Compare the measurements of compression pressure tester with the specifications.
7. Measure the compression pressure of the other cylinders in the same way.
8. If measured value is not within the specifications, perform the cylinder pressure leakage test. Notice
Discharge the combustion residues in the cylinders
before testing the compression pressure.
Apply the parking brake before cranking the
engine.
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M162 ENGINE ELECTRICAL 1E1-11
Circuit Diagram
Inspection & Maintenance Procedure (for MSE)
1. While the ignition switch is in 'OFF' position, remove thewiring connectors (1 and 15) from ignition coil and measure the primary resistance between terminal No.1 and No.15.
2. During engine cranking, measure primary voltage (T1/1) between ECU terminal No. 71 and No. 69.
Notice If out of specified value, replace the ignition coil.
Specified Value
0.9 - 1.6 (20 °C)
Specified Value 200 - 350 V
Notice
Measure remaining cables.
- T1/2 : No. 72 and 69.
- T1/3 : No. 70 and 69.
If out of specified value, check ignition cable and ECU.
3. Using a multi-tester, measure the secondary coil resistance between 5a and 5b.
Specified Value 6 - 8.5 k
Page 533 of 1574

SECTION 1F1
M162 ENGINE CONTROLS
TABLE OF CONTENTS
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cablewill help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwisenoted.
Specifications . . . . . . . . . . . . . . . . . . . . . . . 1F1-2
Fastener Tightening Specifications . . . . . . . . 1F1-2
Special Tools . . . . . . . . . . . . . . . . . . . . . . . 1F1-3 Special Tools Table . . . . . . . . . . . . . . . . . . . . 1F1-3
Schematic and Routing Diagrams . . . . . . . 1F1-4 E32 ECU (HFM) . . . . . . . . . . . . . . . . . . . . . . 1F1-4
E32 ECU (MSE) . . . . . . . . . . . . . . . . . . . . . . 1F1-5
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 1F1-6
Self Diagnosis Socket Pin Numbers andDescriptions . . . . . . . . . . . . . . . . . . . . . . . . 1F1-6
Self Diagnosis Failure Code . . . . . . . . . . . . . 1F1-7
Test Box Connection . . . . . . . . . . . . . . . . . . 1F1-10
Fuel Injection System Test (MSE3.62) . . . . . 1F1-11
Ignition System Test . . . . . . . . . . . . . . . . . . 1F1-21
Idling Control and Electronic Pedal System Test . . . . . . . . . . . . . . . . . . . . . . . 1F1-26
Air Conditioner Control System Test . . . . . . 1F1-28
Fuel Pressure and Internal Leakage Test . . 1F1-29
Fuel Pump Test . . . . . . . . . . . . . . . . . . . . . . 1F1-31Injector Test . . . . . . . . . . . . . . . . . . . . . . . .
1F1-33
Maintenance and Repair . . . . . . . . . . . . . 1F1-35
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . 1F1-35
ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F1-35
Fuel Pressure Regulator . . . . . . . . . . . . . . 1F1-46
Fuel Distributor . . . . . . . . . . . . . . . . . . . . . . 1F1-50
Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F1-54
Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 1F1-57
Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . 1F1-58
Purge Switchover Valve . . . . . . . . . . . . . . . 1F1-62
Vacuum System . . . . . . . . . . . . . . . . . . . . . 1F1-64
Crankshaft Position Sensor . . . . . . . . . . . . 1F1-65
Camshaft Position Sensor . . . . . . . . . . . . . 1F1-67
Hot Film Air Mass (HFM) Sensor . . . . . . . . . 1F1-69
Oxygen Sensor . . . . . . . . . . . . . . . . . . . . . . 1F1-72
Knock Sensor . . . . . . . . . . . . . . . . . . . . . . . 1F1-74
Coolant Temperature Sensor . . . . . . . . . . . 1F1-75
Accelerator Pedal Module . . . . . . . . . . . . . . 1F1-78
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1F1-4 M162 ENGINE CONTROLS
E32 ECU (HFM)
SCHEMATIC AND ROUTING DIAGRAMS
Page 581 of 1574
M162 ENGINE CONTROLS 1F1-49
The pressure difference between the fuel pressure and the intake manifold is approx. 3.2 bars during idling. 1. Fuel Pressure Regulator
2. Intake Manifold
3. Fuel Return(to fuel tank)
4. Fuel Supply(from fuel pump)
7. Fuel Pressure(approx. 3.2 bars)
8. Intake Manifold Negative Pressure(0.6 bars)
A . Fuel pressure
B. Intake Manifold Negative Pressure
LL. Idling
TL. Partial load
V L . Full load
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1F1-70 M162 ENGINE CONTROLS Circuit Diagram
1 Housing
2 Electronic Housing
3 Connector
R H : Heat Resistance
R T : Temperature Resistance
R S : Sensor Resistance
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M162 ENGINE CONTROLS 1F1-79
Accelerator Pedal Sensor Connector(Sensor Side)
Potentiometer 1.Pin no. 3 :Red
Pin no. 1 :YellowPin no. 5 :Brown
Potentiometer 2. Pin no. 6 :VioletPin no. 4 :GreenPin no. 2 :White
Accelerator Pedal Sensor Connector(Vehicle Side)
Potentiometer 1.Pin no. 3 :Red-Black Pin no. 1 :Blue-Green
Pin no. 5 :Yellow-Green
Potentiometer 2. Pin no. 6 :GreenPin no. 4 :Blue-RedPin no. 2 :LightGreen
Function Potentiometer 1, Power Supply(+)
Potentiometer 1, Signal
Potentiometer 2, Ground
Potentiometer 2, Power Supply(+)
Pin no. 3 Pin no. 1 Pin no. 5 Pin no. 6
Pin no. 4 Pin no. 2Potentiometer 2, SignalPotentiometer 2, Ground
Circuit Diagram
Potentiometer 1. Potentiometer 2.