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MMS-3xx Functional Wiring Diagram

Components


F60: Idle switch
G4: Crankshaft Position Sensor
G6: Fuel pump
G28: Engine Speed Sensor
G39: Oxygen sensor I
G40: Hall Sensor
G61: Knock sensor I
G62: Engine Coolant Temperature (ECT) sensor
G66: Knock sensor II
G69: Throttle valve potentiometer
G70: Mass Air Flow (MAF) sensor
G98: Exhaust Gas Recirculation (EGR) temperature sensor
G108: Oxygen sensor II
J176: Fuel pump relay
J192: Engine Control Module (ECM)
N: Ignition coil for cylinders 1 and 6
N18: EGR frequency valve
N30: Fuel injector, cylinder 1
N31: Fuel injector, cylinder 2
N32: Fuel injector, cylinder 3
N33: Fuel injector, cylinder 4
N71: Idle Air Control (IAC) valve
N80: EVAP carbon canister frequency valve
N83: Fuel injector, cylinder 5
N84: Fuel injector, cylinder 6
N122: Power stage for ignition coils
N128: Ignition coil for cylinders 2 and 4
N156: Intake manifold change-over valve
N158: Ignition coil for cylinders 3 and 5
P: Spark plug connector (6x)
Q: Spark plug (6x)
S17: Fuse for G6
S19: Fuse for diagnostic connector
S64: Circuit breaker for N158, N128, and N
S72: Circuit breaker for N30, N31, N32, N33, N83, and N84
S73: Circuit breaker for G39, G108, N18, N80, and N156
S74: Circuit breaker for G70 and G74

Additional Signals


B8: Throttle valve signal (not pictured)
B9: Road speed signal (not pictured)
B10: Engine speed signal (not pictured)
B11: Fuel consumption signal (not pictured)
B12: Shift lever position signal (not pictured)
B13: Shift point signal (not pictured)
C10: A/C compressor signal (not pictured)
C12: Diagnostic signal for Rapid Data (K circuit)
C13: Diagnostic signal for Rapid Data (L circuit)
C14: Flash code signal 		 
Fuel Injectors N30, N31, N32, N33, N83, and N84
N30, N31, N32, N33, N83, N84
The fuel injectors for the MPI system are 4-hole single stream injectors. The injectors are located in front of the intake valves.

Battery voltage is supplied tothe injectors via a 12 amp circuit breaker located in the electronic control box (above the MPI control unit or underneath the steering column).

The power supplied to the injectors does not use external resistance. Due to the sequential fuel injection, a separate power output stage is provided for each injector.

The MPI control unit controls the opening time of the injectors by supplying a ground for each injector.
N30, N31, N32, N33, N83, N84
Substitute Function

In the event of a short circuit to positive (power being bypassed around the injector), the injector that is affected will be switched off until the ignition is turned off. Full throttle enrichment and oxygen sensor control is switched off for the cylinder bank concerned.

Self-diagnosis

The ECU recognizes the following faults:
  • Short circuit to positive
  • Open circuit/short circuit to ground
 
 
 
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