Land Rover Range Rover Automatic Transmission System Rover Manual

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 25 of 52 FaultDescriptionCARBAmbient 1Ambient 2Ambient 315CAN level monitoringP1842N_MOTVGT_$XMMMThe CAN protocol is not compatible between the engine and transmission controller.
Diagnostic operates:On arrival of first CAN message from the Engine Management Controller
Conditions to be met to run Diagnostic:Ignition on
Time between fault present & fault stored:1.5 s
Variables used by the diagnostic:CAN_STAND = 22H (CAN message)
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 316CAN bus monitoringP1841N_MOTVGT_$XMMMMessages being transmitted on the CAN bus are being corruprted.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:300 ms
Variables used by the diagnostic:None
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 317CAN timeout monitoringP1843N_MOTVGT_$XUBATTThere has been no communication from the engine management controller over the CAN serial link for a specified time.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:1 s
Variables used by the diagnostic:Time since last CAN message received
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 318CAN message WFPDK (Throttle angle) is invalid (FFh)P1884N_MOTVGT_$XMMMThe CAN message WFPDK indicates to the transmission controller the driver demand (ie accelerator pedal position).
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10ms
Variables used by the diagnostic:Throttle angle signal on CAN
Will limp home mode be selected:No, substitute throttle angle, Gearbox lights to indicate Kick down not available
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 319CAN message T_MOT invalid (FFh)P1884N_MOTVGT_$XMMMThe CAN message T_MOT (engine temperature) from the engine management controller is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:Engine temperature signal via CAN
Will limp home mode be selected:No, substitute engine temperature used.
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked. 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 26 of 52 FaultDescriptionCARBAmbient 1Ambient 2Ambient 320CAN message V3 (road speed) invalid (FFh)P1884N_MOTVGT_$XMMMThe CAN message V3 (Velocity) from the engine management controller is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10ms
Variables used by the diagnostic:CAN message V3
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 321Downshift safety monitoringP0721N_MOTVGT_$XMMMThe transmission control unit has prevented a gear shift which would have caused an engine overspeed.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:Transmission not in Limp Home
Time between fault present & fault stored:10ms max.
Variables used by the diagnostic:Engine Speed, Target gear
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 322Stall speed monitoringP0722N_MOTVGT_$XMMMThe torque converter has appeared to slip more than the specificed amount.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:40 ms
Variables used by the diagnostic:Engine Speed, gear selected, Output shaft speed.
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 323Position Switch during cranking (99MY Range Rover only)P0705N_MOTYPO_OldUBATTThe engine speed has exceeded its maximum speed.
Diagnostic operates:During cranking only
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:Engine speed, selector position, road speed ?
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 324Battery supply checkP1562N_MOTMMMUBATTWhilst the engine is running, the battery supply has fallen to below  9V.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:Engine speed > 996 rpm
Time between fault present & fault stored:300 ms
Variables used by the diagnostic:Engine speed, battery supply voltage
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked. 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 27 of 52 FaultDescriptionCARBAmbient 1Ambient 2Ambient 325Solenoid valve for TC  (short circuit to - or open circuit)P0743N_MOTAN8UBATTPin 32 (Solenoid valve for torque convertor lockup) is either short circuit to 0V or open circuit.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:Torque converter = locked
Time between fault present & fault stored:20 ms
Variables used by the diagnostic:Status of torque converter drive, Battery voltage
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 326Solenoid valve 1 (line short circuit to - or open circuit)P0753N_MOTAN6UBATTPin 30 (Solenoid valve 1) is either short circuit to 0V or open circuit.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:Solenoid valve 1 = on
Time between fault present & fault stored:20ms
Variables used by the diagnostic:Status of Solenoid valve 1, Battery voltage
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 327Solenoid valve 2 (line short circuit to - or open circuit)P0758N_MOTAN7UBATTPin 33 (Solenoid valve 2) is either short circuit to 0V or open circuit.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:Solenoid valve 2 = on
Time between fault present & fault stored:20 ms
Variables used by the diagnostic:Status of Solenoid valve 1, Battery voltage
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 328Pressure regulator  (line short circuit to - or open circuit)P0748N_MOTVGT_$XUBATTPin 5 (pressure regulator) is either short circuit to 0V or open circuit.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:20 ms
Variables used by the diagnostic:Status of low side pressure regulator driver
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 329Gear ratio monitoring, 1st gearP0731N_MOTVGT_$XMMMRatio of engine speed to output shaft speed whilst 1st gear is engaged is out of range.
Diagnostic operates:NAS vehicles only, Continuously
Conditions to be met to run Diagnostic:1st
 gear selected, gear shift not in progress
Time between fault present & fault stored:800 ms
Variables used by the diagnostic:Engine Speed, Engine Torque, Output shaft speed, Selected gear
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked. 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 28 of 52 FaultDescriptionCARBAmbient 1Ambient 2Ambient 330Gear ratio monitoring, 2nd gearP0732N_MOTVGT_$XMMMRatio of engine speed to output shaft speed whilst 2nd gear is engaged is out of range.
Diagnostic operates:NAS vehicles only, Continuously
Conditions to be met to run Diagnostic:2nd
 gear selected, gear shift not in progress
Time between fault present & fault stored:800 ms
Variables used by the diagnostic:Engine Speed, Engine Torque, Output shaft speed, Selected gear
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 331Gear ratio monitoring, 3rd gearP0733N_MOTVGT_$XMMMRatio of engine speed to output shaft speed whilst 3rd gear is engaged is out of range.
Diagnostic operates:NAS vehicles only, Continuously
Conditions to be met to run Diagnostic:3rd
 gear selected, gear shift not in progress
Time between fault present & fault stored:800 ms
Variables used by the diagnostic:Engine Speed, Engine Torque, Output shaft speed, Selected gear
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 332Gear ratio monitoring, 4th gearP0734N_MOTVGT_$XMMMRatio of engine speed to output shaft speed whilst 4th gear is engaged is out of range.
Diagnostic operates:NAS vehicles only, Continuously
Conditions to be met to run Diagnostic:4th gear selected, gear shift not in progress
Time between fault present & fault stored:800 ms
Variables used by the diagnostic:Engine Speed, Engine Torque, Output shaft speed, Selected gear
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 333CAN message MD_IND invalid, indicated by F_TL_MESP1884N_MOTVGT_$XMMMThe CAN message from the engine management controller which informs the transmission of the engine torque is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:CAN message F_TL_MES
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 334CAN message MD_IND invalid (FFh)P1884N_MOTVGT_$XMMMThe CAN message from the engine management controller which informs the transmission of the engine torque is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:CAN message MD_IND
Will limp home mode be selected:No, substitute engine torque used.
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked. 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 29 of 52 FaultDescriptionCARBAmbient 1Ambient 2Ambient 335CAN message N_MOT invalid, indicated by F_N_MOTP1884N_MOTVGT_$XMMMThe CAN message from the engine management controller which informs the transmission of the engine speed is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:CAN message F_N_MOT
Will limp home mode be selected:Yes
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
99MY Range Rover only, Discovery Series II dummy code.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 336Transmission calibration selection incorrect / invalidP1602N_MOTVGT_$XMMMAn ECU has been fitted to a vehicle an not had the correct calibration selected, or no calibration has been selected.
Diagnostic operates:During initialisation
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:Tune select status
Will limp home mode be selected:No, default shift maps used (normally 4.0l calibration)
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 337CAN message T_ANS invalid (FFh).P1884N_MOTVGT_$XMMMThe CAN message which informs the transmission of the air intake temperature is invalid.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:CAN message T_ANS
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 338CAN message FHOEHE invalid (FFh).P1884N_MOTVGT_$XMMMThe CAN message used to control the special altitude shift patterns is not correct.
Diagnostic operates:Continuously
Conditions to be met to run Diagnostic:None
Time between fault present & fault stored:10 ms
Variables used by the diagnostic:CAN message FHOEHE
Will limp home mode be selected:No
Conditions to be met to clear the fault:Ignition to be switched on whilst fault not present, engine cranked.
FaultDescriptionCARBAmbient 1Ambient 2Ambient 339Range switch plausibility errorP1705N_MOTVGT_$XMMMThe input received from the range switch input cannot be correct.  This may be due to not moving the lever fully, not
necessarily a faulty switch
Diagnostic operates:
Conditions to be met to run Diagnostic:Road speed > 5km/h
Time between fault present & fault stored:50 ms
Variables used by the diagnostic:O/P shaft speed, Road speed (V3), Range Switch status
Will limp home mode be selected:
Conditions to be met to clear the fault: 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 30 of 52 5.3 Impact on the system of each fault
Settings are those for Range Rover, 99MY (Software release L944e1414, 4.0l & 4.6l V8, NAS only)
PriorityControlByte 2 – Protection & DefaultByte 1 – Protection & DefaultFault NumberPriority ByteControl ByteByte 1 - Protection & defaultByte 2 - Protection & defaultPriority level (0 – 7, Bits 5 – 7MIL on with activation of substitute functionDiagnostic function enableDelete error after 40 warm-up cyclesFault is CARB relevantFiltering depends on timeFilter counter not changed if test not fulfilledAfter cranking, return to normal function if fault still presentNot usedReturn to normal function in operation if error not presentLimphomeMax pressureFlash Sport and Manual lights (Gearbox fault message in RR)No 
Kickdown
Substitute throttle angleUse calculate range, not Range switch inputSubstitute engine temperatureOnly E program allowedSubstitute engine torqueNo 
adapitve pressure control
No adaptive shift point controlMaintain current gear in low range / Limphome in HighNo CAN communicationNo gear and lockup diagnosticsDon’t change status of MES line driver outputsNo Hot / High shift point & pressure 
adaption12242443277111111111222424432771111111113225244007111111422424032771111111159624432031111116224244327711111111179625232731111111111896252327311111111119962523273111111111110962523273111111111111962441640311111111120212640011111130212640011111142242524067111111111115224244566711111111111622422840671111111117224236406711111111118962441661563111111111111119962120643111112096212003111121962444063111111111229624440631111111112396244406311111111124962444063111111111259625232731111111111269625232731111111111279625232731111111111289625232731111111111299624432031111113096244320311111131962443203111111329624432031111113396244164031111111134962441650311111111135962444063111111111369624404311111137962121280311111389621212803111113900000 
						

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© Rover Group 1998Page 31 of 526 General information
6.1 Dimensions and fixing details
The transmission controller ECU is located under the front left had seat, under a black metal bracket.  To remove the ECU, a
medium sized philips screwdriver is required, together with  8mm and 10mm sockets, a short (40mm) extension and a 1/4 inch
drive socket.
The trim surrounding the base of the seat must first be removed.  This sometimes requires the panel on the left of the seat to be
removed.  After this has been done, remove  3 x 10mm screws which hold down the bracket.  When these have been removed,
disconnect the ECU from the harness (ensure the ignition is off).  The bracket can now be removed from the vehicle.  Remove
the ECU from the bracket using an 8mm socket.
Approximate ECU dimensions:
6.2 Voltage requirements
VoltageSystem behaivor16.0-26.0Jump start; excess voltage without damage, limphome mode, output stanges for solenoid valves and
pressure regulator switched off (max 1min at 40°C).9.0-16.0Voltage range for normal operation of the EAT with CAN-Bus corresponding to the specification.6.5-9.0Operation of the EAT with diagnostic functions and CAN-Bus enabled, limp home mode, output stages
for solenoid valves and pressure regulator switched off.3.0-6.5Under voltage with data retention in SRAM, limp home mode, unreliable communication over the CAN
bus.0-3.0Undervoltage without reliable function-14-0
Reversed polarity without damage (-14V max 1 min at 25°C)   GETRIEBESTEUERUNG
   GS8.87    BOSCH
     B260502761              MUSTER
     HW-Stand: xxxx        Discovery
     SW-Stand: xxxxxxxx
     0501005463              FTC484x200mm
163mm 60mm95mm32mm 
						

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© Rover Group 1998Page 32 of 52 7 Fault tree analysis
The following pages are a guide to fixing faults with the electronic automatic transmission.  In order to solve  fault, the fault
trees indicate the most logical way a problem should be approached.  If the fault tree indicates the transmission or controller is
faultly, the transmission electronics department should first be consulted.
In the instance, somebody will look at the car, and if nothing is deemed to be faulty with the electronics, the Transmissions
department will check the condition of the gearbox.  If both the transmission and the controller are deemed to be OK, the
diagnosis will have to be further investigated by Transmission Electronics.
7.1.1.1 Fault code 1 – Transmission relay control (Sticks S/C) 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 33 of 52 7.1.1.2 Fault code 2 – Transmission relay control (Permanent  O/C) 
						

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[ZF_4SPD\Project_Specs][Revision:   2.3]
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© Rover Group 1998Page 34 of 52 7.1.1.3 Fault code 3 – EEPROM communication fault
7.1.1.4 Fault code 4 – EPROM checksum fault