Page 607 of 1463
M162 ENGINE CONTROLS 1F1-37
Pin No.Abbreciation Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20-
TM.50
-
-
GND
-
-
-
LSH1
TM.31
TM.87
TM.30
WFS I/O
WFS O
-
GND
LS1
-
-
- -
Starter motor TM.50
-
-
Electronic ground
-
-
-
Lambda probe 1 heating
Power ground TM.31
V-BATTERY TM.87
V-BATTERY TM.30
Immobilizer crypto read
Immobilizer crypto write
-
Lambda probe 1 ground
Lambda probe 1 signal
-
-
-
ECU Pin Numbers and Descriptions
Vehicle Connector
Page 611 of 1463
M162 ENGINE CONTROLS 1F1-41
Application
Pin No.Description
-
Starter motor TM.50
-
-
Electronic ground
-
-
-
Lambda probe 1 heating
Power ground TM.31
V-BATTERY TM.87
V-BATTERY TM.30
Immobilizer crypto read
Immobilizer crypto write
-
Lambda probe 1 ground
Lambda probe 1 signal
-
-
-
Brake switch
-
-
-
-
-
Air conditioning clutch relay
-
-
-1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30-
TM.50
-
-
GND
-
-
-
LSH1
TM.31
TM.87
TM.30
WFS I/O
WFS O
-
GND
LS1
-
-
-
BRS
-
-
-
-
-
KLIKU
-
-
--
l
-
-
l
-
-
-
l
l
l
l
l
l
-
l
l
-
-
-
¡
-
-
-
-
-
l
-
-
--
l
-
-
l
-
-
-
l
l
l
l
l
l
-
l
l
-
-
-
¡
-
-
-
-
-
l
-
-
-
l: Standard, ¡: OptionRemarks
AbbreviationE32 ENG,
5speed M/T E32 ENG,
4speed A/T
(BTRA)
Page 615 of 1463

M162 ENGINE CONTROLS 1F1-45
Removal & Installation Procedure
lwhen removing the ECU only
1. Turn the ignition switch to "OFF" position.
2. Disconnect the negative battery cable.
3. Disconnect the couplings from ECU.
4. Unscrew the left and right bolt (3) on bolt (1) and auxiliarly
bracket and remove the auxiliarly bracket from the bracket
assembly (2).
Installation Notice
5. Unscrew the four bolts (5) and disconnect the ECU (6) from
the bracket assenbly.
Installation Notice
6. Installation should follow the removal procedure in the
reverse order.
Tightening Torque6 - 8 Nm
5 - 7 Nm(1)
(3)
Tightening Torque 5 - 7 Nm
8. Unscrew the bolts (5) and disconnect the ECU (6) from the
bracket assenbly.
Installation Notice lWhen Removing the ECU with ABS or ABS/ASR Unit
1. Turn the ignition switch to "OFF" position.
2. Disconnect the negative battery cable.
3. Disconnect the couplings from ECU.
4. Disconnect the coupling from ABS or ABS/ASR unit.
5. Unscrew the bolt (1) and the left and right flange nuts.
6. Remove the ECU with ABS or ABS/ASR unit assembly.
7. Unscrew the left and right bolt (3) on the auxiliary bracket
and remove the auxiliary bracket from the bracket assembly.
Installation Notice
Tightening Torque 6 - 8 Nm
Tightening Torque 5 - 7 Nm
Tightening Torque 5 - 7 Nm
9. Installation should follow the removal procedure in the
reverse order.
Page 621 of 1463
M162 ENGINE CONTROLS 1F1-51
Removal & Installation Procedure
1. Discharge the fuel pressure from the fuel pressure test
connector.
2. Disconnect the battery ground cable.
3. Disconnect the vacuum hose from the fuel pressure
regulator.
4. Remove the cable guide.
5. Remove the fuel return and supply line.
Notice
lFor removal, cover around parts with cloths not to be
stained by fuel.
lIn case of checking the injector only, do not remove the
fuel return and supply line.
Installation Notice
6. Remove the six injector connectors.
7. Remove the two left and two right bolts and one center bolt
of the fuel distributor assembly from the intake manifold.
Installation Notice
Tightening Torque25 - 30 Nm
Tightening Torque 22.5 - 27.5 Nm
Page 630 of 1463
1F1-60 M162 ENGINE CONTROLS
Tools Required
661 589 00 46 00 Cap Remover
Removal & Installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the harness connector (1).
3. Disconnect the fuel supply (6) and return (5) pipes.
4. Using a special tool, Unscrew the eight fuel retaining bolts
and remove the pump from fuel tank.
Notice
Check the condition of the seal and replace if necessary.
Drain the fuel before removing the pump.
Page 650 of 1463

SECTION 1F2
M161 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 cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise
noted.
Specifications . . . . . . . . . . . . . . . . . . . . . . . 1F2-2
Fastener Tightening Specifications . . . . . . . . 1F2-2
Special Tools . . . . . . . . . . . . . . . . . . . . . . . 1F2-3
Special Tools Table . . . . . . . . . . . . . . . . . . . . 1F2-3
Schematic and Routing Diagrams . . . . . . . 1F2-4
E23 ECU (MSE) . . . . . . . . . . . . . . . . . . . . . . 1F2-4
E23 ECU (HFM) . . . . . . . . . . . . . . . . . . . . . . 1F2-5
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 1F2-6
Self Diagnosis Socket Pin Numbers and
Descriptions . . . . . . . . . . . . . . . . . . . . . . . . 1F2-6
Self Diagnosis Failure Code (for E23 ENG) . 1F2-7
Test Box Connection . . . . . . . . . . . . . . . . . . 1F2-10
Fuel Injection System Test . . . . . . . . . . . . . 1F2-11
Ignition System Test . . . . . . . . . . . . . . . . . . 1F2-20
Idling Control and Electronic Pedal
System Test . . . . . . . . . . . . . . . . . . . . . . . 1F2-25
Air Conditioner Control System Test . . . . . . 1F2-27
Fuel Pressure and Internal Leakage Test . . 1F2-28
Fuel Pump Test . . . . . . . . . . . . . . . . . . . . . . 1F2-30Injector Test . . . . . . . . . . . . . . . . . . . . . . . . 1F2-32
Maintenance and Repair . . . . . . . . . . . . . 1F2-34
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . 1F2-34
ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F2-34
Fuel Pressure Regulator . . . . . . . . . . . . . . 1F2-45
Fuel Distributor . . . . . . . . . . . . . . . . . . . . . . 1F2-49
Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F2-54
Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 1F2-57
Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . 1F2-58
Purge Switchover Valve . . . . . . . . . . . . . . . 1F2-62
Vacuum System . . . . . . . . . . . . . . . . . . . . . 1F2-64
Crankshaft Position Sensor . . . . . . . . . . . . 1F2-66
Camshaft Position Sensor . . . . . . . . . . . . . 1F2-68
Hot Film Air Mass (HFM) Sensor . . . . . . . . . 1F2-70
Oxygen Sensor . . . . . . . . . . . . . . . . . . . . . . 1F2-73
Knock Sensor . . . . . . . . . . . . . . . . . . . . . . . 1F2-75
Coolant Temperature Sensor . . . . . . . . . . . 1F2-76
Accelerator Pedal Module . . . . . . . . . . . . . . 1F2-79
Page 655 of 1463
1F2-6 M161 ENGINE CONTROLS
DIAGNOSIS
SELF DIAGNOSIS SOCKET PIN NUMBERS AND DESCRIPTIONS
1 Ground
2 Ignition 1
3 Battery Power Supply (Fuse NO.17)
4 REKES :PIN 6
5 Engine Speed Signal :MSE PIN 60
6 TCCU(Part-time)
7 STICS(PIN 26)
8-
9-
10 Air Bag(PIN 20)
11 Remote Engine Start Unit(PIN 10)12 -
13 Brake System
(ABS 5.3:PIN 11, ABS/ABD 5.3:PIN 46)
14 MSE 3.62S/3.53S(ECU Data Output:PIN 58)
15 TOD(PIN 20)
1 6 Immobilizer
17 -
1 8 TCU(PIN 23)
19 -
2 0 K-LINE(ECS:PIN 23)
Page 656 of 1463

M161 ENGINE CONTROLS 1F2-7
No ignition voltage output(NO.1 ignition coil;
1, 4cylinder)
No ignition voltage output(NO.2 ignition coil;
2, 3cylinder)
Cranshaft position sensor adaption failure
Start signal recognition failure
No.1 injector short(PWR)
No.1 injector open/short(GND)
No.2 injector short(PWR)
No.2 injector open/short(GND)
No.3 injector short(PWR)
No.3 injector open/short(GND)
No.4 injector short(PWR)
No.4 injector open/short(GND)
High oxygen sensor voltage
Low oxygen sensor amplifying voltage
Oxygen sensor operating failure
Not excessive lean indication in oxygen
sensor(during coasting)
Oxygen sensor heater short(power)
Oxygen sensor heater open/short(GND)
Low oxygen sensor voltage
Short learning control failure
Lambda control failure (rich stop)
Lambda control failure (lean stop)
Lambda idle adaptation failure(above rich
threshold)
Lambda idle adaptation failure(below lean
threshold)
learning control failure(rich, low load) Coolant temperature sensor open
Coolant temperature sensor short
Coolant temperature sensor signal failure
Intake temperature sensor open
Intake temperature sensor short
Intake temperature sensor signal failure
Low battery voltage
HFM sensor signal failure
HFM sensor signal failure (Low)
HFM sensor signal failure (High)
Crankshaft position sensor signal failure
(no engine revolution signal)
Crankshaft position sensor signal failure
(rpm > max. value)
No.1 cylinder recognition failure
Crankshaft position sensor signal failure
(gab recognition failure)
Transmission coding failure
Transponder signal communication failure
CAN communication failure : TCU(A/T only)
CAN communication failure :
communication initialization failure
Fuel pump relay short(PWR)
Fuel pump relay open/short(GND)
Purge valve short
Purge valve open/short
Condenser fan(HI) relay short(PWR)
Condenser fan(HI) relay short(GND)
No.1 knock sensor signal failure
No.1 cylinder synchronization failure 00
01
02
03
04
05
08
09
10
11
17
18
19
20
21
25
26
31
34
35
40
41
44
45
56
58
Failure
codeDescriptionFailure
codeDescription
64
65
67
71
72
73
74
75
76
77
78
79
80
81
82
83
86
87
89
93
96
97
98
99
100
SELF DIAGNOSIS FAILURE CODE (FOR E23 ENG)