S14 SR20DET LHD F4
1 – PU – Wipers INT VR
2 – L/Y – Wipers INT SW
3 –
4 –
5 – Y/G – Speed signal to dash (VSP)
6 –
7 – R/G – ECU to Power transistor IGN#3
8 – G/B – CONSULT SCI RX IN
9 – G/Y – Turn Signal LH side
10 – L/G – FAN CONTROL (RF RH)
11 – R/L – ECU to Power transistor IGN#4
12 – G/OR – Neutral position switch (NEUT) (MT ONLY!, AT wires R/G to F7 plug)
13 –
14 –
15 – G/W – CONSULT CLK
16 – R/Y – ECU to Power transistor IGN#2
17 – G/Y – AC Tripple pressure switch (AC RLY)
18 – G – CONSULT TX OUT
19 – G/R – CONSULT CHECK
20 – OR/L – FAN CONTROL (RF RL)
21 – PU/W – Power steering oil pressure switch (PWST)
22 – B/P – Fuel pump relay (from ecu to relay)
23 – B – Boost pressure sensor ground to ecu
24 – LG/R – ECU to Boost pressure sensor (AVCC)
25 – R – ECU AIR CON
26 – R/W – ECU to Power transistor IGN#1
27 – OR/B – Wastegate control (from ecu to wg solenoid) (WGC)
28 – OR – Malfunction indicator (check engine) (LED-R)
29 – BR – O2 sensor/VTC +12v from ignition
30 – OR/L – Start Signal
31 – B/Y – IACV-AAC VALVE (idle) +12V
32 – R – BATTERY to ECCS RELAY +12V
33 – G – Power transistor to coil#4
34 – BR – Power transistor to coil#3
35 – W – Power transistor to coil#2
36 – R – Power transistor to coil#1
37 – L/R – IACV-FICD solenoid valve
38 – GRAY – Boost sensor signal shielding ground
39 – W – Boost pressure sensor to ECU (TPRESS)
40 – B/R – Ignition switch +12V (powers injectors relay)
41 – BR – Wipers OFF AND INT SW
42 – LG/R – Wipers LO
43 – LG/B – Wipers HI
44 – LG – Wipers +12V
45 – P – Wipers washer switch (WASH SW)
46 –
47 – L/R – Rear window defogger switch (LOAD) (AT MODELS ONLY)
48 – B/R – IGN SW to ECU +12V

S14 SR20DET RHD F4
1 – PU – Wipers INT VR
2 – L/Y – Wipers INT SW
3 –
4 –
5 – Y/G – Speed signal to dash (VSP)
6 –
7 –
8 – G/B – CONSULT SCI RX IN
9 –
10 – B – Consult GND
11 –
12 – G/OR – Neutral position switch (NEUT) (MT ONLY!, AT wires R/G to F7 plug)
13 –
14 –
15 – G/W – CONSULT CLK
16 – G/B – Side turn signal lamp LH
17 – G/Y – AC Tripple pressure switch (AC RLY)
18 – G – CONSULT TX OUT
19 – G/R – CONSULT CHECK
20 – OR/L – FAN CONTROL (RF RL)
21 – L/R – EGR (from ecu)
22 – B/Y – Fuel pump relay (from ecu to relay)
23 – B – Boost pressure sensor ground to ecu
24 – LG/R – ECU to Boost pressure sensor (AVCC)
25 – R – ECU AIR CON
26 – L/G – FAN CONTROL (RF RH)
27 –
28 – OR – Malfunction indicator (check engine) (LED-R)
29 – BR – O2 sensor /Wastegate solenoid/VTC +12v from ignition
30 – OR/L – Start Signal
31 – B/Y – IACV-AAC VALVE (idle) +12V
32 – R – BATTERY to ECCS RELAY +12V
33 –
34 –
35 – B/W – CAS +12V to IMMU
36 – B/W – CAS +12V from IMMU
37 – L/R – IACV-FICD solenoid valve
38 – GRAY – Boost sensor signal shielding ground
39 – W – Boost pressure sensor to ECU (TPRESS)
40 – R/L – Ignition switch +12V (powers injectors relay)
41 – BR – Wipers OFF AND INT SW
42 – LG/R – Wipers LO
43 – LG/B – Wipers HI
44 – LG – Wipers +12V
45 – P – Wipers washer switch (WASH SW)
46 –
47 –
48 – BR – IGN SW to ECU +12V

240SX S14 KA24 ECU
02/94 – 07/94: 23710-70F00 (Superceded by 2371M-70F03RE)
07/94 – 09/94: 23710-70F01, 23710-70F02 (Superceded by 2371M-70F03RE)
09/94 – 02/95: 23710-70F02, 23710-70F03 (Superceded by 2371M-70F03RE)
02/95 – 07/95: 23710-70F03 (Superceded by 2371M-70F03RE)
07/95 – 12/95: 23710-72F01, 23710-72F02 (Superceded by 2371M-72F05RE)
12/95 – 02/96: 23710-72F02, 23710-72F03 (Superceded by 2371M-72F05RE)
02/96 – 07/96: 23710-72F03, 23710-72F04 (Superceded by 2371M-72F05RE)
07/96 – 07/97: 23710-81F00, 23710-81F02 (Superceded by 2371M-81F03RE)
07/97 – 12/97: 23710-81F60, 23710-81F61 (Superceded by 2371M-81F79RE)
12/97 – 06/98: 23710-81F61, 23710-81F78 (Superceded by 2371M-81F79RE)

“1995 ECU” 2371M-70F03RE is interchangeable with “1996 ECU” 2371M-72F05RE except pins 9 and 12 are swapped.