EGI Wiring

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Categories: Fuel System | Fuel Injection

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Revision as of 05:39, 10 September 2015 ddgonzal (Talk | contribs) (->Overview) <- Previous diff		Current revision ddgonzal (Talk | contribs)
Line 3:		Line 3:
	{{EGI Navbox}}<br>		{{EGI Navbox}}<br>
-	== Overview ==	+	= Overview =
-	Wiring here is based on Datsun S110 (Silvia/Gazelle/240RS), specifically the 1981 USA "200SX" version.	+	Wiring here is based on Datsun S110 (Silvia/Gazelle/240RS), specifically the 1981 USA "200SX" version. See [[200SX EFI]].
-		+
-	[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/200sxEFI http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/200sxEFI/th_wiring39.jpg]	+
	The simplified "4-wire" setup, which assumes you are using a factory wiring harness cut out of a donor car, is:		The simplified "4-wire" setup, which assumes you are using a factory wiring harness cut out of a donor car, is:
Line 14:		Line 12:
	* FUEL PUMP		* FUEL PUMP
-	== Engine Harness ==	+
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=21852 http://datsun1200.com/uploads/photos/21852.jpg]	+	= Engine Harness =
		+	{{Album|21852}}
	<br>Engine harness		<br>Engine harness
	* Injectors		* Injectors
Line 23:		Line 22:
-	== ECU ==	+	= ECU Wiring =
-	* 22612-N7801 to 0681 (no O2)	+	22612-N7801 to 0681 (no O2)
-	* 22612-N8500 from 0781 (O2 sensor)	+	22612-N8500 from 0781 (O2 sensor)
-	* Wires to passenger compartment	+
-	* EFI relay	+
-	* INPUTS	+
-	** coil negative (tach sense)	+
-	** air flow meter	+
-	** air temp sensor (in flow meter)	+
-	** throttle valve sensor	+
-	** START wire for ignition switch (to indicate when to do cold-start enrichment)	+
-	** water temp sensor (on underside of intake manifold)	+
-	** O2 sensor (not used on early B310)	+
-	* OUTPUTS	+
-	** Injector output	+
-	== Fuel Pump Wiring ==	+	Wires from ECU to engine compartment
-	* 2 wires to pump	+	OUTPUTS
-	** B - earth/ground	+	* Injector outputs (4)
-	** LgR - (Light Green with Red stripe) pump power	+
-	* 3 relays (FUEL PUMP RELAY 1, FUEL PUMP RELAY 2, FUEL PUMP RELAY 3)	+	Wires from engine compartment to passenger compartment
-	** The extra relays are for safety. Relay takes inputs from Alternator, Oil pressure switch and ECU. Pump will shut off if engine dies because Oil and Charge will go out. This is important for safety in a crash.	+	INPUTS
		+	* Power (from EFI relay)
		+	* coil negative (tach sense)
		+	* air flow meter
		+	* air temp sensor (in flow meter)
		+	* throttle valve sensor
		+	* START wire for ignition switch (to indicate when to do cold-start enrichment)
		+	* water temp sensor (on underside of intake manifold)
		+	* O2 sensor (not used on early B310)
-	== Dropping Resistor ==	+	== EFI Relay ==
-	Fuel injector dropping resistor: 2.35 ohms resistance. Two blue (L) wires.	+	Needed: One relay, one Fusible Link, 20 gauge Power & Ground wires
-	[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/engine/EFI/20100829190547DSC00753x.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/engine/EFI/th_20100829190547DSC00753x.jpg]	+	There is a dedicated [[Fusible Link]] for the ECU
		+	<br>{{Album|26065}}
-	== EFI Relay ==	+	{{Album|21854}}
-	There is a dedicated fusible link for the ECU	+	[[Relay#5-pin|25230-C9900]] RELAY ASSY [or 25230-C9907]
-	<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=21855 http://datsun1200.com/uploads/photos/21855.jpg]	+	* SWITCH:
		+	* C: BW wire from IGN switch
		+	* E: B ground/earth
		+	* D SOURCE: from Brown fusible link to Light Green/white
		+	* B OUTPUT: LgR to Red wire to ECU #207
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=21854 http://datsun1200.com/uploads/photos/21854.jpg]	+	200SX factory wiring diagram
-	* 25230-C9900, 25230-C9907 RELAY ASSY	+	<br>{{Thumb|21855}}
-	* SWITCH:	+
-	** C: BW wire from IGN switch	+	B310 A14E wiring diagram
-	** E: B ground/earth	+	<br>{{Photo|034aRelayECU_1.jpg|Datsun%201200/wiki/1978_A14E}} [http://s297.photobucket.com/user/ddgonzal/media/Datsun%201200/wiki/1978_A14E/034aRelayECU-1.jpg.html full] | [http://s297.photobucket.com/user/ddgonzal/media/Datsun%201200/wiki/1978_A14E/034aRelayECU.jpg.html original]
-	* D SOURCE: from Brown fusible link to Light Green/white	+	B310 ECU PIN
-	* B OUTPUT: LgR to Red wire to ECU #207	+	27 POWER
		+	15 EARTH
		+
		+	= Fuel Pump Wiring =
		+	Pump has 2 wires
		+	* B: earth/ground
		+	* LgR (Light Green with Red stripe): pump power
		+
		+	S110 uses 3 relays: FUEL PUMP RELAY 1, FUEL PUMP RELAY 2, FUEL PUMP RELAY 3. The multiple relays are for safety. Relay takes inputs from Alternator, ECU, and Oil pressure switch. Pump will shut off if engine dies, because Oil and Charge will stop working, the relays shut the pump off. This is important for safety in a crash.
	== Fuel Pump Relays ==		== Fuel Pump Relays ==
-	At the minumum you need one relay for the fuel pump. It draws over 5 amps, so you don't want to run it directly through the IGN switch.	+	At the minumum to protect the wiring, you need one relay for the fuel pump. It draws over 5 amps, so you don't want to run it directly through the IGN switch at the risk of burning out the switch contacts or overloading the existing small IGN wiring.
-	Although you could use one, for safety the Datsun factory system uses a chained system of three relays.	+	Although you could use the minimum one relay, for safety the Datsun factory system uses a chained system of three relays.
-	* Nissan 5-blade relay	+	Nissan 5-blade relay
-	* 25230-C9900, 25230-C9907 RELAY-FUEL PUMP JIDECO	+	* 25230-C9900/25230-C9907 RELAY-FUEL PUMP JIDECO
-	* 25230-C9905 RELAY-FUEL PUMP NILES	+	* 25230-C9905 RELAY-FUEL PUMP NILES
	=== Fuel Pump Relay 1 ===		=== Fuel Pump Relay 1 ===
	Pump On/Off: this relay engergizes the Fuel Pump and Air Regulator, but Relay 2 can open the circuit.		Pump On/Off: this relay engergizes the Fuel Pump and Air Regulator, but Relay 2 can open the circuit.
-	* SWITCH:
-	** C: (Lg) from Fuel Pump Relay 2 OUTPUT (Lg)
-	** E: Earth/ground
-	* D SOURCE: BW from IGN switch
-	* B OUTPUT: LgR
-	** to Air Regulator LgR
-	** to Fuel Pump LgR
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=21854 http://datsun1200.com/uploads/photos/21854.jpg]	+	* SWITCH:
		+	* C: (Lg) from Fuel Pump Relay 2 OUTPUT (Lg)
		+	* E: Earth/ground
		+	* D SOURCE: BW from IGN switch
		+	* B OUTPUT: LgR
		+	* to Air Regulator LgR
		+	* to Fuel Pump LgR
		+
		+	{{Album|21854}}
	=== Fuel Pump Relay 2 ===		=== Fuel Pump Relay 2 ===
	Pump Power: This relay is wired NORMALLY CONNECTED (i.e. when off). It passes on to Relay 1, but when Relay 3 is on it disconnects.		Pump Power: This relay is wired NORMALLY CONNECTED (i.e. when off). It passes on to Relay 1, but when Relay 3 is on it disconnects.
-	* SWITCH OFF:	+	* SWITCH OFF:
-	** C: L from ACC L FUSE 15A	+	* C: L from ACC L FUSE 15A
-	** E: (switched ground) LW from Relay 3 OUTPUT (LW)	+	* E: (switched ground) LW from Relay 3 OUTPUT (LW)
-	* D SOURCE: BW from IGN switch	+	* D SOURCE: BW from IGN switch
-	* A OUTPUT NORMALLY CONNECTED: Lg to Relay 1 SWITCH(Lg)	+	* A OUTPUT NORMALLY CONNECTED: Lg to Relay 1 SWITCH(Lg)
	=== Fuel Pump Relay 3 ===		=== Fuel Pump Relay 3 ===
	Pump Cutout: This disconnects the Pump Feed relay in certain scenarios.		Pump Cutout: This disconnects the Pump Feed relay in certain scenarios.
-	SWITCH:	+	* SWITCH:
-	* C: BW from IGN switch	+	* C: BW from IGN switch
-	* E: WR to DIODE to Alternator WR	+	* E: WR to DIODE to Alternator WR
-	D SOURCE: YW to GROUND/EARTH via Oil Pressure Switch	+	* D SOURCE: YW to GROUND/EARTH via Oil Pressure Switch
-	B OUTPUT: LW to Relay 2 SWITCH (LW)	+	* B OUTPUT: LW to Relay 2 SWITCH (LW)
-		+	200SX Oil Pressure Switch is a dual-wire type because 200SX has an oil pressure gauge, but we only need the typical sensor used on all A-series engines. If you want to use a Oil Pressure Gauge, you can fit this sensor.
-	200SX Oil Pressure Switch is a dual-wire type because 200SX has an oil pressure gauge, but we only needs a regular sensor used on all A-series engines.	+
	25070-80W0 DUAL OUPUT		25070-80W0 DUAL OUPUT
	* On/off pressure switch for OIL light & fuel pump relay		* On/off pressure switch for OIL light & fuel pump relay
	* Resistor sensor for gauge		* Resistor sensor for gauge
		+
		+	= Injector Wiring =
		+	How the injectors are wired depends on the [[ECU]] you use. The following is information on Nissan ECUs. If using Motec, Haltech, etc. see their instructions.
		+
		+	Here's the actual schematic for Dropping Resistor wiring from the '''1978 A14E Service Manual'''. It shows a 5-pin resistor pack.
		+	<br>{{Photo!|EGI_harness_.jpg|Datsun%201200/wiki/1978_A14E}} [[A14E_Service_Manual#EGI_Harness_Check|EGI Harness]]
		+
		+	1981 S110 USA (Z20 engine) uses the same 5-wire Dropping Resistor
		+	<br>{{Photo|200X_EFI_injectors.jpg|Datsun%201200/wiki/200sxEFI}}
		+
		+	* Both systems provide 12V to the resistor pack common pin.
		+	* The injectors are grounded via the four ECU injector pins.
		+	* B310 (A14E) 12V is supplied via dedicated Fusible Link and ECU/ECCS relay
		+	* S110 (Z20E) 12V is supplied via dedicated Fusible Link (always hot)
		+
		+	1978 A14E
		+	<br>{{Photo|034a_relayINJECTORS.jpg|Datsun%201200/wiki/1978_A14E}}
		+
		+	== Dropping Resistor ==
		+	Fuel injector dropping resistor: 2.35 ohms resistance.
		+
		+	{{Photo|20100829190547DSC00753x.jpg|Datsun%201200/engine/EFI}}
	[[Category:Fuel System]]		[[Category:Fuel System]]
-	[[Category:Fuel Injection]]	+	[[Category:Fuel Injection]]{{End}}

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Current revision

Wiring for the Datsun A14/A15 EFI (EGI) system.

Contents 1 Overview 2 Engine Harness 3 ECU Wiring 3.1 EFI Relay 4 Fuel Pump Wiring 4.1 Fuel Pump Relays 4.1.1 Fuel Pump Relay 1 4.1.2 Fuel Pump Relay 2 4.1.3 Fuel Pump Relay 3 5 Injector Wiring 5.1 Dropping Resistor

Overview

Wiring here is based on Datsun S110 (Silvia/Gazelle/240RS), specifically the 1981 USA "200SX" version. See 200SX EFI.

The simplified "4-wire" setup, which assumes you are using a factory wiring harness cut out of a donor car, is:

• IGN
• START
• GROUND/EARTH
• FUEL PUMP

Engine Harness

Album 21852
Engine harness

• Injectors
• Air Regulator (air bypass system -- for idle speed)
• EGR/VVT vacuum-cut switch (can be disconnected)
• Throttle Sensor (Throttle position sensor)

ECU Wiring

22612-N7801 to 0681 (no O2)
22612-N8500 from 0781 (O2 sensor)

Wires from ECU to engine compartment
OUTPUTS
* Injector outputs (4)

Wires from engine compartment to passenger compartment
INPUTS
* Power (from EFI relay)
* coil negative (tach sense)
* air flow meter
* air temp sensor (in flow meter)
* throttle valve sensor
* START wire for ignition switch (to indicate when to do cold-start enrichment)
* water temp sensor (on underside of intake manifold)
* O2 sensor (not used on early B310)

EFI Relay

Needed: One relay, one Fusible Link, 20 gauge Power & Ground wires

There is a dedicated Fusible Link for the ECU
Album 26065

Album 21854
25230-C9900 RELAY ASSY [or 25230-C9907]
* SWITCH: 
  * C: BW wire from IGN switch
  * E: B ground/earth
* D SOURCE: from Brown fusible link to Light Green/white
* B OUTPUT: LgR to Red wire to ECU #207

200SX factory wiring diagram
Album click to view

B310 A14E wiring diagram
full | original

B310 ECU PIN
27 POWER
15 EARTH

Fuel Pump Wiring

Pump has 2 wires
* B: earth/ground
* LgR (Light Green with Red stripe): pump power

S110 uses 3 relays: FUEL PUMP RELAY 1, FUEL PUMP RELAY 2, FUEL PUMP RELAY 3. The multiple relays are for safety. Relay takes inputs from Alternator, ECU, and Oil pressure switch. Pump will shut off if engine dies, because Oil and Charge will stop working, the relays shut the pump off. This is important for safety in a crash.

Fuel Pump Relays

At the minumum to protect the wiring, you need one relay for the fuel pump. It draws over 5 amps, so you don't want to run it directly through the IGN switch at the risk of burning out the switch contacts or overloading the existing small IGN wiring.

Although you could use the minimum one relay, for safety the Datsun factory system uses a chained system of three relays.

Nissan 5-blade relay
* 25230-C9900/25230-C9907 RELAY-FUEL PUMP JIDECO 
* 25230-C9905 RELAY-FUEL PUMP NILES 

Fuel Pump Relay 1

Pump On/Off: this relay engergizes the Fuel Pump and Air Regulator, but Relay 2 can open the circuit.

* SWITCH: 
  * C: (Lg) from Fuel Pump Relay 2 OUTPUT (Lg)
  * E: Earth/ground
* D SOURCE: BW from IGN switch
* B OUTPUT: LgR 
  * to Air Regulator LgR
  * to Fuel Pump LgR

Album 21854

Fuel Pump Relay 2

Pump Power: This relay is wired NORMALLY CONNECTED (i.e. when off). It passes on to Relay 1, but when Relay 3 is on it disconnects.

* SWITCH OFF: 
  * C: L from ACC L FUSE 15A
  * E: (switched ground) LW from Relay 3 OUTPUT (LW)
* D SOURCE: BW from IGN switch
* A OUTPUT NORMALLY CONNECTED: Lg to Relay 1 SWITCH(Lg)

Fuel Pump Relay 3

Pump Cutout: This disconnects the Pump Feed relay in certain scenarios.

* SWITCH: 
  * C: BW from IGN switch
  * E: WR to DIODE to Alternator WR
* D SOURCE: YW to GROUND/EARTH via Oil Pressure Switch
* B OUTPUT: LW to Relay 2 SWITCH (LW)

200SX Oil Pressure Switch is a dual-wire type because 200SX has an oil pressure gauge, but we only need the typical sensor used on all A-series engines. If you want to use a Oil Pressure Gauge, you can fit this sensor.

25070-80W0 DUAL OUPUT
* On/off pressure switch for OIL light & fuel pump relay
* Resistor sensor for gauge

Injector Wiring

How the injectors are wired depends on the ECU you use. The following is information on Nissan ECUs. If using Motec, Haltech, etc. see their instructions.

Here's the actual schematic for Dropping Resistor wiring from the 1978 A14E Service Manual. It shows a 5-pin resistor pack.
EGI Harness

1981 S110 USA (Z20 engine) uses the same 5-wire Dropping Resistor

• Both systems provide 12V to the resistor pack common pin.
• The injectors are grounded via the four ECU injector pins.
• B310 (A14E) 12V is supplied via dedicated Fusible Link and ECU/ECCS relay
• S110 (Z20E) 12V is supplied via dedicated Fusible Link (always hot)

1978 A14E

Dropping Resistor

Fuel injector dropping resistor: 2.35 ohms resistance.

 

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