Freelander System Description and Operation
AUTOMATIC GEARBOX - JATCO
44-40
DESCRIPTION AND OPERATION
P1841
All
CAN Bus monitoring
All CAN bus components
operate correctly
CAN Bus malfunction – No
CAN messages or incorrect
messages – Check wiring
and connections – Check
engine management
system and instrument
pack
P1842
All
CAN level monitoring
All CAN bus components
operate correctly
CAN bus malfunction – No
CAN messages or
incorrect/incompatible
messages – Check wiring
and connections – Check
engine management
system and instrument
pack
P1844
From
2002MY
Engine RPM (speed signal)
ECM transmits engine
speed on CAN
Error flag set – Check
wiring and connections –
Check engine management
system
Engine temperature signal
ECM transmits ECT
sensor signal on CAN
Error flag set – Check
wiring and connections –
Check engine management
system
Throttle angle signal
ECM transmits throttle
angle on CAN
Error flag set – Check
wiring and connections –
Check APP sensor – Check
engine management
system
Virtual throttle angle
ECM transmits virtual
throttle angle on CAN
Error flag set – Check
wiring and connections –
Check APP Sensor –
Check engine management
system
CAN bus error – missing
engine control module
All CAN bus components
operate correctly
Check ECM and EAT ECU
wiring and connections –
Check engine management
system/Instrument pack
P Code
Applicabili
ty
Component
Correct Operation /
Value
Description of Fault and
Rectification Action
