ECU LH 2.4 and 2.4.1 Connection Descriptions:
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10-11-12-13-14-15-16-17-18
19-20-21-22-23-24-25-26-27-28-29-30-31-32-33-34-35
Pin # Lead Color Input/Output Component/Function
1 Blue Input Engine speed signal Voltage, 6.5 - On starter motor cranking, >8 - At idle speed
2 Gray -- Throttle position switch (Idling) Voltage, 0 - Idle speed, approx. 11 - Above idle speed
3 Green/Red -- Throttle position switch (Wide Open) Voltage, 0 - Wide open, approx. 11 - Before wide open
4 Red Input Power supply +30 Voltage, Battery voltage
5 Black -- Signal Ground Voltage, 0.0 - Separate from power ground
6 Blue/White Input Mass air flow, ground Voltage, 0.0 - Separate from power ground
7 Orange Input Mass air flow, signal Voltage, 2.0 - Idling, 5.0 - Full Load
8 Red/White Output Mass air flow, burn-off Voltage, 4.0 - At burn-off, 0 - In other cases
9 Gray/White Input Power supply - main relay Voltage, Battery Voltage
10 -- --
11 Green/Red -- A/C Relay (LH 2.4.1) Time-delay relay, A/C (LH2.4)
12 Blue/White I/O Diagnostics lead K Data link connector, pin 1
13 Yellow Input Temperature sensor Voltage, 4 - 0.5 (-20) degrees C, (+80) degrees C
14 Red/White Input A/C, ACC load signal Voltage, 12 - AUTO closed antifrost thermostat Voltage, 0 - ECON, OFF selected
15 Green/Yellow -- Jumper connection for cold start Voltage, 12 - Valve fitted Voltage, 0 - Valve not fitted
16 Green/Red I/O Diagnostics lead L Data link connector, pin 2
17 Black/White -- Chassis ground Voltage, 0 - Separate from signal ground
18 Green/White Output Injectors, control signal Voltage, 7.1 Hz, 2.4 - 4.5 ms Frequency should increase with throttle opening.
19 Yellow/White Output EGR valve (CA, M1990) Voltage, Battery voltage - Not activated Voltage, Less than battery voltage - Activated
20 Violet -- Fuel Pump operating circuit Voltage, 1 - Activated, Voltage, Battery voltage - Ignition on
21 Yellow/White Output Main relay operating circuit Output Voltage, 1 - Ignition on, Battery voltage - Ignition off
22 Violet/White Output CHECK ENGINE light Voltage, Battery voltage - Off, 1 - On
23 Yellow/White Input EGR temp sensor (CA, M1990) Voltage, 4.5 - EGR closed, <4.5 - EGR Open
24 Green Input Oxygen sensor Voltage, 0.6 - 1.0 - Rich, 0.0 - 0.4 - Lean
25 Blue/Red Output Load Signal Tq (EZK/DI) Frequency should increase with throttle opening.
26 White Output Shift-Up lamp (US Manual) Voltage, Battery voltage - Not activated Voltage, 0 - Activated
27 Yellow/Red Output EVAP canister purge valve Voltage, Battery voltage - Open valve, 1 - Closed valve
28 White Input PRE-IGNition, DI/APC Voltage, 0 - Enrichment Preignition, 6.5 - No enrichment, 12 - Enrichment knocking
29 Gray/White Input Codification Voltage, 12 - Automatic transmission
30 Orange Input Raising engine idle speed, auto Voltage, Battery voltage - R,D,1,2,3, 0 - P,N, and manual
31 Green/Red Output Consumption signal to EDU Frequency should increase with throttle opening.
32 Brown Output Cold-starting valve Voltage, Battery voltage - Not activated Voltage, 0 - Activated (< -15 degrees C)
33 Blue/White Output IAC valve Voltage, 5-11 - Idling, no load
34 Green Input Speed sensor Voltage, 6 - Rotating wheels Voltage, 0 or 12 - Stationary wheels
35 Green/White Input Power supply +15 Voltage, battery - Ignition on
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