Engine Management System Schematic - From 99MY

ECM engine interface inputs:
1. Knock sensor (2 off)
2. Engine coolant temperature (ECT) sensor
3. Throttle position (TP) sensor
4. Camshaft position (CMP) sensor
5. Crankshaft speed and position sensor
6. Engine control module (ECM)
7. Mass air flow (MAF)/Inlet air temperature (IAT) sensor

Fuel system:
8. Canister vent solenoid (CVS) valve (output)
9. Purge valve (output)
10. Fuel tank pressure sensor (input)

Emissions:
11. Heated oxygen sensors (0, 2 or 4 dependent on market destination)
- HO2S sensor signal inputs
- HO2S sensor heater supply outputs

Air Conditioning System:
12. - Air conditioning compressor (output)
- Air conditioning condenser fan relay (output)
- Air conditioning request (input)
- Condenser fan request (input)

BeCM:
13. BeCM
- Immobilization signal (input)
- Fuel tank level signal (input)

Instrument pack:
14. Check Engine/Service Engine Soon (NAS) warning lamp (output)
15. Fuel used signal - display (output)
16. Tachometer (output)

E-box:
17. E-box cooling fan control (output)

ECM engine interface outputs:
18. Ignition coils (4 off)
19. Idle air control (IAC) actuator
20. Fuel injectors (8 off)
21. Fuel pump relay

Diagnostics:
22. Diagnostic connector (bi-directional)

Power supply:
23. Main relay (input)

Electronic Control Unit interfaces:
24. Electronic Automatic Transmission (EAT) ECU (via bi-directional CAN link)
25. Transfer Box ECU (MIL request)
26. ABS ECU (Rough road signal)

Ignition switched power supply:
27. Ignition switch - position II (input)