Land Rover Fuel Injection System Manual

LAND ROVER 
 
Mounting ECU and main + fuel relays
A metal structure was constructed from sections of narrow gauge steel an\
d angle iron to form a 
base in which the injection control box could tightly sit. This was scre\
wed to mounting positions in 
the battery box under the passenger seat. The 14CUX frame clears the pos\
itive terminal of the 
battery by roughly 2 inches. Both main and fuel relays are mounted to th\
e box frame using thin 
strip aluminium. 
 
Fitting the wiring loom
The fitting...

LAND ROVER 
Figure 61 – Wiring the diagnostic display into the loom plug
 
 
Using the diagnostic reader
First the reader must be used in “connect” mode by pushing the swi\
tch away from you. Turn on the 
ignition, at which point the status LED (the DP on the seven segment di\
splay) will illuminate. If any 
error code is stored by the 14CUX it will be displayed now.
 
You can easily simulate a code 15 error by disconnecting the fuel temper\
ature sensor. 
 
Clearing error codes can be done in two ways....

LAND ROVER 
stopping G force, the inertia switch activated and disconnected the fuel\
 pump. 
 
If the inertia switch false triggers, it is a simple matter to push in t\
he activation button in order to 
reset it. This switch is wired directly in line with the fuel pump. 
 
The target vehicle employs the same precaution using an inertia switch s\
pecified for the donor 
vehicle.  
 
A range rover inertia switch has been bolted to the B pillar directly be\
hind the front passenger seat 
back rest. It is...

LAND ROVER 
26Very lean mixture Lean or misfire condition. Probable causes are 
a faulty low or out of range lambda sensor or 
an ignition fault causing a misfire. This code is 
generally only used on the jaguar 
implementation of the 14CUX and is generally 
not listed under the Range Rover fault codes. 
28 Air leak Check for air leaks in the following areas
l     Hose, air flow meter to plenum
l     PCV
l     Brake servo hose
l     Distributor advance/retard pipe
l     Injector seals
l     Any other...

LAND ROVER 
68Road speed sensor output too 
low at medium RPM and high air 
flow Possible sensor or wiring fault. Valid for cat 
cars only
88 Power up check Two interpretations for this. For non cat cars, 
the code is shown on power up but isn’t a 
code. For cat cars it is used to show that there 
is a purge valve fault with the evaporative 
emissions carbon canister system. 
 
 
Appendix B – Final notes, comments and links
 
l     Engine thermostat must be a 74 degrees C part with no joggle hole
 
l...

;;^d;‘;r; 1987
FUEL INJECTION SYSTEM 119 1r
U.
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Ui I““IRR1752EFUEL INJECTION 
- Circuit Diagram
1. 40 way connector to Electronic Control Unit
(ECU).
2. Lambda sensor (left side 
- bank A).
3. Lambda sensor (right side 
- bank 8).4. By-pass air valve (stepper motor) (fast idle).
5. Lambda sensor screened ground.
6. Fuse 18 
- main fuse panel.
7. Inertia switch.
8. Fuel pump.
9. 
Ignition switch.
10. Speed transducer (road speed input).
7 1. Neutralswitch (automatic gearbox) (load
input).
12. Pick-up...

l-l19 FUEL INJECTION SYSTEM1987 rot;;
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RELAY8FWL 
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lNJcc10nsFOR ENONE
ROAO OFEED WUtTIIANOOUCERION CNAIOWCOOLANT 
tEYPERATU(IEl LNIOR FRONT OF ENOM
FUEL TEYFEIIATUREl EN10RliNOiNE FULL RAIL
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TWROTTLE FOTENTIOYETEFRONT OF
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LEFTIDE OF ENWIE l AV...

ggf;i 1987
FUEL INJECTION SYSTEM 119 1INTRODUCTION
The Electronic Fuel injection system provides a
reliable and efficient microprocessor controlled fuel
management system.The function of the system is to supply the exact
amount of fuel directly into the inlet manifold
according to the prevailing engine operating
conditions.To monitor these conditions, various sensors are
fitted to the engine to measure engine parameters.
Data from the sensors is received by the ElectronicControl Unit (E.C.U.), the E.C.U....

FUEL INJECTION SYSTEM1987 rGv;;
FUEL PRESSURE REGULATORTHROlTLE POTENTIOMETERThe fuel pressure regulator is mounted in the fuel
rail at the rear of the plenum chamber. The
regulator is a mechanical device controlled by
plenum chamber vacuum, it ensures that fuel rail
pressure is maintained at a constant pressure
difference of 2.5 bar above that of the manifold.
When pressure exceeds the regulator setting excess
fuel is returned to the fuel tank.
FUEL PUMPThe electric fuel pump is located in the fuel...

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FOE; 1987
FUEL INJECTION SYSTEM b ii\INERTIA SWITCH
The inertia switch is a mechanically operated switch
located under the left hand front seat attached to
the seat base rear cross-member.
The switch is normally closed and is in the ignition
feed (fuse to fuel pump). In the event of a sudden
impact the switch opens, and disconnects the
electrical feed to the fuel pump. The switch is reset
by pressing down the button.
RELAYSThe two electronic fuel injection relays...