1400-1401 / 1904
ELECTRICAL
CIRCUIT SCHEMATIC OF EMS ECU (SHEET 4 OF 5)
BOSCH 112 pin ECU -Connectors & Pin Defination – Vehicle Side ECU Connector 1
Connectors
BOSCH 112 pin ECU -
& Pin Defination – Vehicle Side ECU Connector 1
Pin No
Pin Description
I/O Active Current
Limitation
Comment
Pin No
Pin Description
I/O Active Current
Limitation
Comment
101
HTW LED on Instrument Cluster
O PWM 1A
129
MIL LED on Instrument Cluster
O
-
50mA
102
CE LED on Instrument Cluster
O PWM 1A
130
Engine Speed Signal
O
-
50mA PP - Freq. Signal
103
Sensor Ground 3 for T-MAP sensor
Gnd
-
-
Ground
131
AC Compressor Relay Command
O Low 600mA
104 Sensor Ground 4 for CNG Tank pressure, AC Pressure & oil pressure
& temp sensor
Gnd
-
-
132
CAN H (+) Interface Communic tion
I\O -
-
a Bus
S G d 1 f S
G d
G d
CAN H ( ) C lib ti
I\O
C i ti
B
105
ensor roun
or pare
n
-
-
roun
133
+
a ra on
-
-
ommun ca on us
106
Sensor Ground 2 for Spare
Gnd
-
-
PP - Ground
134
Crank Input KL-50
I
107
Spare
I
Low
-
135
Spare
I
108
Spare
I
Low
-
136
AC Request Signal
Digital
I
Low
-
Signal
109
CNG Tank Pressure Signal
I
Analog
-
137
5V sensor supply 2 for CNG Tank Pressure, AC Pressure,
CNG Rail press & Cam sensors
O
-
-
110
AC Pressure Signal
I
Analog
-
138
3.3V Sensor Supply 4 for spare
O
-
-
111
Spare Analog
I
-
139
K-Line Communication
I\O -
-
Communication Bus
112
Manifold Air Pressure Signal
I
140
AC Fan Relay
O Low 600mA ON\OFF signal
113
Stepper Driver C
O High 600mA
141
Radiator Fan Relay
O Low 600mA
PWM signal
114
Not Used
142
Fuel Pump Relay Command
O Low 600mA ON\OFF Signal
115
Main Relay Driver
O Low
143
Not Used
116
Ignition Switch KL-15
I
High
-
Voltage Signal
144
CAN L (-) Interface
I\O -
-
117
Low Fuel input
I
Low\ High -
Digital Signal
145
CAN L (-) Calibration
I\O -
-
118
Spare Input
I
Low
-
PP - Digital Input
146
I
PWM -
Signal
119
Spare Input
I
low
-
147
Spare
I
120
CNG\ Gasoline Mode selec tion switch
I
Low
-
Digital Input Signal
148
Spare
I
High
High
121
Spare Input
I
Analog
-
149
Stepper Driver C
O
-
-
122
Spare Input
I
Analog\
High
-
150
Stepper Driver B
O
-
-
123
Coolant Level Sensor
I
Analog
-
PP
151
Stepper Driver A
O
-
-
124
Oil Pressure Signal
I
Analog
-
PP
152
Stepper Driver D
O
-
-
125
5V sensor supply 2 for TMAP, CNG Tank Pressure
and Oil Pressure & Temp Sensors
O -
-
153
Power Ground 2
I
Gnd
-
Ground
126
+3.3V Supply for Spare
-
-
-
154
Power Ground 3
I
Gnd
-
Ground
127
LIN BusCommunic ation
I
-
-
PP- Communication Bus
155
Battery Supply After Main Relay
I
-
-
Co munic
128
Spare
O CN-G
-
For
switch
156
Battery Supply After Main Relay
I
-
-
Ground
ON/OFF Signal
Analog
-
Digital Input Signal
Ground
Freq.nd Signal
High
High Digital Signal -Optional
Digital Input Signal
High
-
CNG refueling interlock Signal
PWM Signal - Optional
Communication Bus
Communication Bus
High
Digital Input Signal
Digital Signal -Optional
Digital Signal
Digital Input Signal