Nissan ECU’s, engine wirings and pinouts

SR20DET ECU’s are S13 REDTOP/BLACKTOP, S14 76pin and S14A 64pin. JDM S14 uses the 64pin plug ecu.


S14 SR20DET ecu connector 76pin


S13 and S14A LHD SR20DET ecu connector 64pin

S14 SR20DET F4 connector – view from terminal side T.S.

JDM S14 - 23710-74F05 07/95 - 07/96 ECU pinout (same as EURO S14A)
ECU power → relay R 109 101 W/B Injector #1
Injector #2 Y/B 110 102 O/B Wastegate valve control
O2 heater gnd B 111 103 G/B Injector #3
Injector #4 L/B 112 104 -
AAC idle Light Blue 113 105 L/R EGR → F4 29
VTC Y 114 106 B/Y Fuel pump → F4 30
- 115 107 B GND
GND B 116 108 B GND
NATS → F4 19 G/Y 8 1 R/W PTU coil #1
Cooling fan → F4 28 O/L 9 2 L/B Tachometer
- 10 3 R/Y PTU coil #2
AC relay → F4 25 G/Y 11 4 R/B ECU relay
- 12 5 R/G PTU coil #3
GND B 13 6 B GND
Consult CLK G/W 14 7 G/B Consult RX
Consult Check G/R 23 15 G Consult TX
Malfunction Indication lamp O 24 16 W MAF signal
PTU coil #4 R/L 25 17 B MAF GND
NATS → F4 15 Y/G 26 18 L/O Coolant sensor input
Knock sensor W 27 19 W O2 signal
- 28 20 W TPS signal
- 29 21 B TPS GND (temp sensor gnd)
CAS position (=ecu pin 22) B 30 22 B CAS position (=ecu pin30)
Cas reference (=ecu pin31) W 40 31 W CAS reference (=ecu pin40)
AR CON → F4 17 R 41 32 Y/G Speed
- 42 33 -
Power steering switch Violet/W 43 34 O/L Start signal → F4 22
- 44 35 G/O Neutral switch → F4 4
- 45 36 B/R Ignition to injectors → F4 48
ECU relay R 46 37 Light Green/R TPS power output
ECU power → relay B/W 47 38 B/W Power relay
GND B 48 39 B GND

F4 SR20

23710-74F05 F4 pinout
Wiper Violet 9 1 -
Wiper L/W 10 2 B NATS ground
Tachometer → ecu2 L/B 11 3 B GND
Water temp to dash Y 12 4 G/O Neutral switch → ecu35
Speed → ecu32 Y/G 13 5 G/Y ABS
- 14 6 L/R ABS
NATS → ecu26 Y/G 15 7 G/W Consult CLK
Consult RX G/B 16 8 G/B LH turn signal
AC relay → ecu11 G/Y 25 17 R AR CON → ecu41
Consult TX G 26 18 -
Consult Check G/Brown 27 19 G/Y NATS → ecu8
Cooling fan → ecu9 O/L 28 20 O Malfunction Indication lamp → ecu24
EGR → ecu105 L/R 29 21 Brown O2
Fuel pump → ecu106 B/Y 30 22 O/L Start signal → ecu34
- 31 23 B/Y EVAP
- 32 24 R ECU backup power
- 41 33 Brown Wiper
- 42 34 Light Green/R Wiper
- 43 35 Light Green/B Wiper
- 44 36 Light Green Wiper
AC L/R 45 37 Pink Wiper
- 46 38 - Wiper
- 47 39 -
Ignition to injectors → ecu36 B/R 48 40 -

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

S14A SR20DET LHD F4

1 – PU – Wiper Int VR from amplifier
2 – L/Y – Wiper INT SQ from amplifier
3 – L/B – Tacho F1 2
4 – Y – Water temp gauge
5 – Y/G – Gearbox speed sensor F1 32
6 – OR – TPS power – AT ONLY
7 – R/G – IGN#3 ignitor F1 5
8 – G/B – Consult RX F1 7

9 – G/Y – Turn signal RIGHT
10 – L/G – AC fan high RF RH F1 10
11 – R/L – IGN#4 ignitor F1 25
12 – G/OR – Neutral switch F1 35
13 – L/R – ABS malfunction light
14 – GREY – ABS
15 – G/W – Consult clock F1 14
16 – R/Y – IGN#2 ignitor F1 3

17 – G/Y – AC relay control
18 – G – Consult TX F1 15
19 – G/R – Consult check F1 23
20 – OR/L – AC fan low AF RL F1 9
21 – PINK/W – Power steering switch F1 43
22 – B/P – Fuel pump F1 106
23 – Y/G – NATS IMMU F1 26
24 – G/Y – NATS IMMU F1 8

25 – R – AIR CON F1 41
26 – R/W – IGN#1 ignitor F1 1
27 – OR/B – Wastegate solenoid F1 102
28 – OR – Check engine light F1 24
29 – BR – VTC/O2/Wastegate solenoid power
30 – OR/L – Start signal F1 34
31 – B/Y – Idle solenoid power
32 – R – ECCS RELAY POWER F1 46/109

33 – DARK GREEN – Ignitor to coil 4
34 – BROWN – Ignitor to coil 3
35 – W – Ignitor to coil 2
36 – R – Ignitor to coil 1
37 – L/R – IACV Solenoid power
38 – B – GND
39 – B – GND
40 – B/R – IGN ON, INJ POWER

41 – BROWN – Wiper OFF AND INT SW to amplifier
42 – LIGHT GREEN/R – Wiper LO
43 – LIGHT GREEN/B – Wiper HI
44 – LIGHT GREEN – Ignition +12V
45 – P – Wiper wash from amplifier
46 – B – GND for ABS sensor shield
47 – L/R – AT Load switch F1 33 AT ONLY
48 – L/R – EGR solenoid F1 105

S14A SR20DET LHD F1

1 – R/W – IGN#1 ignitor F4 26
2 – L/B – Tach output F4 3
3 – R/Y – IGN#2 ignitor F4 16
4 – R/B – SSOFF power from ECCS relay F2
5 – R/G – IGN#3 ignitor F4 7
6 – B – Ground
7 – G/B – Consult RX F4 8

8 – G/Y – NATS IMMU
9 – OR/L – AC fan low AF RL F4 20
10 – L/G – AC fan high RF RH F4 10
11 – B/PINK – IDLE AC relay AR RLY
12 – L/R – AT DT3
13 – B – Ground
14 – G/W – Consult clock F4 15

15 – G – Consult TX F4 18
16 – W – MAF SIGNAL QA+
17 – B – MAF GND QA-
18 – L/OR – COOLANT SENSOR TW
19 – W – O2 sensor signal O2S
20 – W – TPS signal TVO
21 – B – SENSOR GROUND, TPS/COOLANT TEMP GND-A
22 – B – CAS POS

23 – G/R – Consult check F4 19
24 – OR – Check engine light F4 28
25 – R/L – IGN#4 ignitor F4 11
26 – Y/G – NATS IMMU
27 – W – Knock sensor KNK
28
29
30 – B – CAS POS

31 – W – CAS REF
32 – Y/G – Speed signal VSP F4 5
33 – L/R – AT Load switch F4 47 AT ONLY
34 – OR/L – Start signal F4 30
35 – G/OR – Neutral switch F4 12
36 – B/R – IGNITION/Start signal F4 40
37 – LG/R – TPS power AVCC
38 – B/W – VB ECCS relay F2 ON
39 – B – Ground

40 – W – CAS REF
41 – R – AIR CON F4 25
42 –
43 – VIOLET/W – Power steering switch F4 21
44 – L/W – AT DT2
45 – L/G – AT DT1
46 – R – BATT – F4 32
47 – B/W – VB ECCS relay F2 ON
48 – B – Ground

101 – W/B – Injector 1 INJ#1
102 – OR/B – Wastegate solenoid WGC F4 27
103 – G/B – Injector 3 INJ#3
104
105 – L/R – EGR solenoid F4 48
106 – B/P – Fuel pump relay FPR F4 22
107 – B – Ground
108 – B – Ground

109 – R – BATT – F4 32
110 – Y/B – Injector 2 INJ#2
111 – LIGHT RED – O2 sensor O2H
112 – L/B – Injector 4 INJ#4
113 – LIGHT BLUE (SB) – Idle solenoid ISC
114 – Y – VTC solenoid
115
116 – B – Ground

S14A SR20DET RHD AT F4

1 – PU – Wiper Int VR from amplifier
2 – L/Y – Wiper INT SQ from amplifier
3 – L/B – Tacho F1 2
4 – Y – Water temp gauge
5 – Y/G – Speed signal VSP F1 32
6 – G/O – AT TPS
7 – Y/G – NATS F1 26
8 – G/B – Consult RX F1 7

9
10 – B – Consult ground
11 – B – NATS ground
12
13 – GRAY – ABS
14 – L/R – ABS
15 – G/W – Consult clock F1 14
16 – G/B – LH turn signal

17 – G/Y – IDLE AC relay AR RLY F1 11
18 – G – Consult TX F1 15
19 – G/R – Consult check F1 23
20 – O/L – AC fan low AF RL F1 9
21 – L/R – EGR solenoid F1 105
22 – B/Y – Fuel pump F1 106
23
24

25 – R – AIR CON F1 41
26
27
28 – OR – Check engine light F1 24
29 – BR – VTC/O2/Wastegate solenoid power
30 – OR/L – Start signal F1 34
31 – B/Y – Idle solenoid power
32 – R – ECCS RELAY POWER F1 46/109

33
34
35
36
37 – L/R – IACV FICD Solenoid valve
38
39
40 – B/R – IGN ON, INJ POWER F1 36

41 – BR – Wiper OFF AND INT SW to amplifier
42 – LG/R – Wiper LO
43 – LG/B – Wiper HI
44 – LG – Ignition +12V
45 – P – Wiper wash from amplifier
46
47 – L/R – AT Load switch F1 33
48

S14A SR20DET RHD AT F1

1 – R/W – IGN#1 ignitor
2 – L/B – Tach output F4 3
3 – R/Y – IGN#2 ignitor
4 – R/B – SSOFF power from ECCS relay F2
5 – R/G – IGN#3 ignitor
6 – B – Ground
7 – G/B – Consult RX F4 8

8
9 – OR/L – AC fan low AF RL F4 20
10
11 – G/Y – IDLE AC relay AR RLY F4 17
12 – L/R – AT DT3
13 – B – Ground
14 – G/W – Consult clock F4 15

15 – G – Consult TX F4 18
16 – W – MAF SIGNAL QA+
17 – B – MAF GND QA-
18 – L/OR – COOLANT SENSOR TW
19 – W – O2 sensor signal O2S
20 – W – TPS signal TVO
21 – B – SENSOR GROUND, TPS/COOLANT TEMP GND-A
22 – B – CAS POS

23 – G/R – Consult check F4 19
24 – OR – Check engine light F4 28
25 – R/L – IGN#4 ignitor
26 – Y/G – NATS F4 7
27 – W – Knock sensor KNK
28 – R/Y – AT
29
30 – B – CAS POS

31 – W – CAS REF
32 – Y/G – Speed signal VSP F4 5
33 – L/R – AT Load switch F4 47
34 – OR/L – Start signal F4 30
35 – R/G – Neutral switch
36 – B/R – Ignition switch +12v F4 40
37 – LG/R – TPS power AVCC
38 – B/W – VB ECCS relay F2 ON
39 – B – Ground

40 – W – CAS REF
41 – R – AIR CON F4 25
42
43 – VIOLET/W – Power steering switch
44 – L/W – AT DT2
45 – L/G – AT DT1
46 – R – BATT – F4 32
47 – B/W – VB ECCS relay F2 ON
48 – B – Ground

101 – W/B – Injector 1 INJ#1
102 – OR/B – Wastegate solenoid WGC
103 – G/B – Injector 3 INJ#3
104
105 – L/R – EGR solenoid F4 21
106 – B/Y – Fuel pump relay FPR F4 22
107 – B – Ground
108 – B – Ground

109 – R – BATT – F4 32
110 – Y/B – Injector 2 INJ#2
111 – LIGHT RED – O2 sensor O2H
112 – L/B – Injector 4 INJ#4
113 – LIGHT BLUE (SB) – Idle solenoid ISC
114 – Y – VTC solenoid
115
116 – B – Ground

S13 SR20DET ECU

01/91-01/94
23710-50F00 MT 62
23710-50F10 AT 63
23710-52F10 DE AT 61

01/94-08/96
23710-50F05 MT E5
23710-50F15 AT E6

08/96-05/97
23710-60F06 MT J4
23710-60F16 AT J5
23710-60F00 DE MT
23710-60F10 DE AT

05/97
23710-60F07 MT J4
23710-60F17 AT J5

S14 SR20DET ECU

JDM SR20DET WC

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.

8 thoughts on “Nissan ECU’s, engine wirings and pinouts

  1. Hi
    I Have a nissan sr20de and looking for the pinout the ecu is a 2371053J12 can you help thanks

    • What car is it from? P10 primera? there should be a factory service manual with all required pinouts available to download.

    • I’ve traced this ECU and wiring loom myself, couldn’t find anything online or in service manuals.

  2. hi team I am making my u14 bluebird / p11 primera in to a race car so I wasn’t in need of windows, lights ect and I have now cut 1 to many wires now it doesn’t start.
    any loom info will be good, I have only touched the loom that comes from the grey box to the fuse box and all the loom behind dash eg radio heater loom ect any diagrams will hopefully help

    its running an sr20de with the hyper cvt m6 auto gearbox.

  3. Hi there. What about the f7 plug up by the fuse box in the engine bay, do you have the pinout and what wires are for which for this plug?

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