Range Rover Automatic Transmission. Manual — part 13
System Information Document
____________________________________________________________________________________________________
_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
_
© Rover Group 1998
Page 23 of 52
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
7
Solenoid valve lockup clutch check (short circuit to +)
P0743
N_MOT
AN8
UBATT
The transmission ECU has diagnosed a short circuit to 12V of pin 32.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
Torque converter unlocked
Time between fault present & fault stored:
10ms
Variables used by the diagnostic:
Voltage at Pin 32
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Initialisation complete, engine cranked, diagnostic runs & fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
8
Solenoid valve 1check (short circuit to +)
P0753
N_MOT
AN6
UBATT
The transmission ECU has diagnosed a short circuit to 12V of pin 30.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
Solenoid valve 1 = off
Time between fault present & fault stored:
10ms
Variables used by the diagnostic:
Voltage at Pin30
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Initialisation complete, engine cranked, diagnostic runs & fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
9
Solenoid valve 2check (short circuit to +)
P0758
N_MOT
AN7
UBATT
The transmission ECU has diagnosed a short circuit to 12V of pin 33.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
Solenoid valve 2 = off
Time between fault present & fault stored:
10ms
Variables used by the diagnostic:
Voltage at Pin 33
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Initialisation complete, engine cranked, diagnostic runs & fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
10
Pressure regulator check (short circuit to +)
P0748
N_MOT
VGT_$X
UBATT
The transmission ECU has diagnosed a short circuit to 12V of pin 5.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
150ms
Variables used by the diagnostic:
Voltage at Pin 5
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Initialisation complete, engine cranked, diagnostic runs & fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
11
CAN message MD_REIB invalid (FFh)
P1884
N_MOT
VGT_$X
MMM
The CAN message from the engine management controller which informs the transmission of the engine friction is invalid.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
No CAN timeout or CAN level fault stored
Time between fault present & fault stored:
Filter time 2.5s
Variables used by the diagnostic:
CAN message MD_REIB from engine management controller
Will limp home mode be selected:
No
Conditions to be met to clear the fault:
Engine started with fault no present
System Information Document
____________________________________________________________________________________________________
_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
_
© Rover Group 1998
Page 24 of 52
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
12
MES line 1 fault
P1810
N_MOT
AN9
UBATT
One of the wires which drives the sport and manual lights in the instrument pack has an electrical fault.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
1 s
Variables used by the diagnostic:
Voltage at 51
Will limp home mode be selected:
No
Conditions to be met to clear the fault:
Ignition on with fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
13
MES line 2 fault
P1810
N_MOT
AN11
UBATT
One of the wires which drives the sport and manual lights in the instrument pack has an electrical fault.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
1 s
Variables used by the diagnostic:
Voltage at pin 25
Will limp home mode be selected:
No
Conditions to be met to clear the fault:
Ignition on with fault not present
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
14
Position switch monitoring (permanent)
P0705
N_MOT
YPO_OLd
UBATT
The position switch is the electrical input to the transmission controller of the driver selected PRiNDle position. The fault
means the ECU has recognised an electrical code from this switch which does not represent a valid position.
The fault can be due to 3 reasons. Firstly, one or more of the wires to the position switch has become open circuit or short
circuit to 0V or 12V. Secondly, the 12V supply from the body control unit to the position switch has been removed whilst the
ignition is in position II (in extreme circumstances, this may be possible whilst the vehicle is cranking). Thirdly, the position
switch is worn, or has water / dirt ingress. In the last case, the position switch must be changed. The following table indiates
the voltages which should be seen by the ECU in each selector position, whilst the ignition is on.
98MY Discovery selector codes. (A Z* code in this table represents an intermediate selector position.)
Position Switch
ECU Pin
Selector Position
P
Z1
R
Z1
N
Z2
D
Z3
3
Z4
2
Z4
1
Line 1 (W)
36
12V
12V
-
12V
12V
12V
12V
12V
-
-
-
-
-
Line 2 (X)
8
-
12V
12V
12V
12V
-
-
12V
12V
-
-
-
-
Line 3 (Y)
37
-
-
-
-
12V
12V
12V
12V
12V
12V
-
12V
12
Line 4 (Z)
9
-
-
-
-
-
-
12V
12V
12V
12V
12V
12V
-
99MY Range Rover selector codes.
Position Switch
ECU Pin
Selector Position
P
R
N
D
3
2
1
Line 1 (W)
36
0V
0V
>
>
0V
0V
>
Line 2 (X)
8
>
0V
0V
0V
0V
>
>
Line 3 (Y)
37
>
>
>
0V
0V
0V
0V
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
100 ms
Variables used by the diagnostic:
W,X,Y, (Z) digital inputs
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.
System Information Document
____________________________________________________________________________________________________
_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
_
© Rover Group 1998
Page 25 of 52
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
15
CAN level monitoring
P1842
N_MOT
VGT_$X
MMM
The CAN protocol is not compatible between the engine and transmission controller.
Diagnostic operates:
On arrival of first CAN message from the Engine Management Controller
Conditions to be met to run Diagnostic:
Ignition on
Time between fault present & fault stored:
1.5 s
Variables used by the diagnostic:
CAN_STAND = 22H (CAN message)
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Ignition to be switched on whilst fault not present, engine cranked.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
16
CAN bus monitoring
P1841
N_MOT
VGT_$X
MMM
Messages 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.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
17
CAN timeout monitoring
P1843
N_MOT
VGT_$X
UBATT
There has been no communication from the engine management controller over the CAN serial link for a specified time.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
1 s
Variables used by the diagnostic:
Time since last CAN message received
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Ignition to be switched on whilst fault not present, engine cranked.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
18
CAN message WFPDK (Throttle angle) is invalid (FFh)
P1884
N_MOT
VGT_$X
MMM
The 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.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
19
CAN message T_MOT invalid (FFh)
P1884
N_MOT
VGT_$X
MMM
The CAN message T_MOT (engine temperature) from the engine management controller is invalid.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
None
Time between fault present & fault stored:
10 ms
Variables used by the diagnostic:
Engine temperature signal via CAN
Will limp home mode be selected:
No, substitute engine temperature used.
Conditions to be met to clear the fault:
Ignition to be switched on whilst fault not present, engine cranked.
System Information Document
____________________________________________________________________________________________________
_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
_
© Rover Group 1998
Page 26 of 52
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
20
CAN message V3 (road speed) invalid (FFh)
P1884
N_MOT
VGT_$X
MMM
The 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.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
21
Downshift safety monitoring
P0721
N_MOT
VGT_$X
MMM
The transmission control unit has prevented a gear shift which would have caused an engine overspeed.
Diagnostic operates:
Continuously
Conditions to be met to run Diagnostic:
Transmission not in Limp Home
Time between fault present & fault stored:
10ms max.
Variables used by the diagnostic:
Engine Speed, Target gear
Will limp home mode be selected:
Yes
Conditions to be met to clear the fault:
Ignition to be switched on whilst fault not present, engine cranked.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
22
Stall speed monitoring
P0722
N_MOT
VGT_$X
MMM
The 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.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
23
Position Switch during cranking (99MY Range Rover only)
P0705
N_MOT
YPO_Old
UBATT
The 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.
Fault
Description
CARB
Ambient 1
Ambient 2
Ambient 3
24
Battery supply check
P1562
N_MOT
MMM
UBATT
Whilst 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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