BMW Z3 E37 1998 Electrical Troubleshooting Manual page 90

BMW BMW BMW BM
04/99
Z3
Pin Assignments
Pin Type Description/Function
117 A Idle speed control valve control
118 A Oxygen sensor heating
119 A Activate valve
120 A Activate valve
121 Not used
122 M Ground, remaining output stages (except
for ignition and fuel injection valves)
123 Not used
124 A A/C compressor cut-out
125 Not used
126 Not used
127 Not used
128 E Cyl. 3-4 knock sensor
129 Not used
130 E TI-measurement signal (fuel consumption)
131 Not used
132 E Throttle position
133 E Signal input
134 M Sensor ground
135 Not used
136 Not used
137 A Cyl. 1 ignition coil control
138 A Cyl. 2 ignition coil control
139 Not used
140 Not used
141 A Component supply (+)
142 E Battery voltage from engine control module
relay
143 M Ground, ignition
144 E Ignition switch, terminal 15
145 A Activate auxiliary fan
E = Input, A = Output, M = Ground
1210.20 b
Connection
Idle speed control valve
Oxygen sensor (in front of catalytic
converter)
Cyl. 3 fuel injection valve
Cyl. 2 fuel injection valve
Ground point
Compressor control relay
Knock sensor
Instrument cluster
Throttle position sensor
Hot film air mass meter
Oxygen sensors
Cyl. 1 ignition coil
Cyl. 2 ignition coil
Throttle position sensor/fuel tank pressure
sensors
Engine control module relay, terminal 87
Ground point
Ignition switch, terminal 15
Normal speed relay
1998