sensor LAND ROVER DISCOVERY 1999 Manual Online

LAND ROVER DISCOVERY 1999 Manual Online DISCOVERY 1999 LAND ROVER LAND ROVER https://www.carmanualsonline.info/img/64/57247/w960_57247-0.png LAND ROVER DISCOVERY 1999 Manual Online

Page 324 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-25
In the event of a MAF sensor signal failure any of the following symptoms may be observed:
lDuring driving engine rev/min may dip, befor

Page 325 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
18-2-26 DESCRIPTION AND OPERATION
Intake air temperature (IAT) sensor
The intake air temperature (IAT) sensor utilises a thermistor with a negative temperature coefficien

Page 326 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-27
There are two types of IAT sensor diagnostic checks:
lThe IAT sensor signal is less than the minimum threshold – the engine has to hav

Page 327 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
18-2-28 DESCRIPTION AND OPERATION
Throttle Position (TP) sensor (C0175)
The TP sensor is located on the throttle body assembly in the engine compartment. The ECM is able

Page 328 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-29
In the event of a TP sensor signal failure any of the following symptoms may be observed:
lEngine performance concern.
lDelayed throttle

Page 329 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
18-2-30 DESCRIPTION AND OPERATION
Heated Oxygen Sensors (HO2S) (C0642) 
The market requirement dictates how many HO
2S are fitted to the vehicle.
l4 sensors are fitted to

Page 330 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-31
The heater is driven by the ECM providing an earth path for the circuit as follows:
lUpstream LH bank  via pin 19 of connector C0635 of

Page 331 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
18-2-32 DESCRIPTION AND OPERATION
Should a malfunction of the component occur the following fault codes may be evident and can be retrieved by 
TestBook:
P Code J2012 Des

Page 338 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-39
Should a malfunction of the component occur the following fault codes may be evident and can be retrieved by 
TestBook.
Evaporative emis

Page 341 of 1529

LAND ROVER DISCOVERY 1999 Manual Online ENGINE MANAGEMENT SYSTEM - V8
18-2-42 DESCRIPTION AND OPERATION
Knock Sensor (KS)
The ECM uses two knock sensors located between the centre two cylinders of each bank to detect pre-ignition. The 
knoc