Engine Control Module

25 Position ECU Plug:

CONNECTOR VIEW
This vehicle has Duel-ECU's:
- One Yellow
- One Black/Blue
Please observe which Terminal ID applies.

SYSTEM
XJ40 LH Lucas

LOCATION
Under glove box passenger side

[YELLOW] TERMINAL ID
1 - Supply from main relay
2 - Coolant temperature sensor
3 - Neutral/Park switches
4 - Serial link
5 - Ignition timing control
6 - Feedback monitor from 1990 & later
7 - Ignition timing select from 1990 & later
8 - Instrument panel - speedometer
9 - Serial link 1989 & earlier only
10 - Air Mass Meter - Idle Trim
11 - Engine Speed 1990 & later
12 - Fueling fault
13 - Crankshaft sensor signal
14 - Throttle position sensor signal
15 - Fuel injector pulse
16 - Air Mass Meter Signal
17 - Oxygen sensor signal
18 - Oxygen sensor ground
19 - Serial link
20 - Air temperature sensor
21 - A/C compressor clutch
22 - Throttle position sensor supply
23 - N/A
24 - Crankshaft sensor ground
25 - N/A

[BLACK] TERMINAL ID
1 - Ignition signal output
2 - Air injection relay control 1990 & later
3 - Air Mass Meter ground
4 - Ignition amplifier bypass speed
5 - Purge valve control 1990 & later
6 - Throttle potentiometer ground 1988 - 89
7 - Fuel pump relay control
8 - Starter 1988-89/ EGR temp. sen.1 990 & up
9 - Injection pulse to ECT 1990 & later
10 - Supply from main relay
11 - Ground
12 - lnj. driver 1988-89/ lnj. supply 1990 & up
13 - Injector driver 1988 & later
14 - Battery (+) feed
15 - Idle speed "A" Stepper motor
16 - Idle speed "D" Stepper motor
17 - Ground 1988-89/ lnj. supply 1990 & later
18 - Idle speed "C" Stepper motor
19 - Idle speed "D" Stepper motor
20 - Air val. 1988-89/ EGR so. val. 1990 & up
21 - N/A
22 - Supply from main relay 1990 & later
23 - Ground
24 - Ground
25 - Injector driver