L322 Range Rover System Description and Operation
INSTRUMENTS
DESCRIPTION AND OPERATION
88-27
Test Function No. 7 – Momentary Values for Engine Coolant Temperature, Engine Speed and Ambient
Temperature
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. The following data
can be scrolled through using the trip reset button.
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'KTMP: 105
°
C' – This shows the engine coolant temperature. If the ignition is in position II the temperature
signal is passed on the CAN to the instrument pack. If the ignition is in position I, the temperature signal is
read from the analogue input from the engine coolant temperature sensor to the instrument pack.
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'N: 248/0 U/min' – This shows the momentary engine speed received on the CAN from the ECM.
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'ATMP: +20.0
°
C' – This shows the ambient temperature received from the ambient air temperature sensor.
If error conditions exist, the following table shows the values which will be displayed.
Test Function No. 8 – Momentary Values for Effective and Displayed Speed in km/h
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. The following data
can be scrolled through using the trip reset button.
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'V: 98 km/h' – shows the momentary effective speed.
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'VAnz: 101 km/h' – shows the displayed speed, compensated for speed signal input error.
Test Function No. 9 – Battery Voltage Supply to Instrument Pack in Volts
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. The following data
can be scrolled through using the trip reset button.
This function allows the operating voltage applied to the instrument pack to be checked. The value is calculated
by measurement of the stabilized 5V internal voltage and monitoring of voltage drop internally within the
instrument pack.
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'UB: 13.2V' – Shows battery voltage.
Test Function 10 – Read Country Code
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. The following data
can be scrolled through using the trip reset button.
The language and country code is programmed into the instrument pack EEPROM at the factory, but can be
changed using TestBook/T4.
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'LAND: 07 CDN' – shows the country code programmed in the instrument pack.
Signal
Error Condition
Test Function display
Engine coolant temperature via
direct connection to sensor
Short circuit of sensor input to battery
voltage
KTMP: -128
°
C
Short circuit of sensor input to ground
KTMP: -128
°
C
Engine coolant temperature via CAN
signal
Coolant temperature error
KTMP: -128
°
C
Ambient temperature
Short circuit of sensor input to battery
voltage
ATMP: -40
°
C
Short circuit of sensor input to ground
ATMP: -40
°
C
Engine speed via CAN
Engine speed = 0
N: 65535 U/MIN
