2010 JAGUAR XFR b1087

DTC Description Possible Causes Action error following
re-programming
Noise/EMC related error network for interference/EMC related issues B1009-63 Ignition Authorisation
- Circuit/component
protection time-out
CJB fault
Low speed CAN fault
Instrument cluster fault
Low battery voltage <9V
Check Power and Ground supplies to CJB and
instrument cluster. Check CAN communications
between CJB and instrument cluster. Check
battery is in fully charged and serviceable
condition, refer to the battery care manual B1009-64 Ignition Authorisation
- Signal plausibility
failure
CJB fault
Low speed CAN fault
Instrument cluster fault
Check power and ground supplies to CJB and
instrument cluster. Check CAN communications
between CJB and instrument cluster B102B-67
Passive Key - Signal
incorrect after event
CJB fault
Low speed CAN fault
Remote Keyless Entry (RKE)
module fault
Write target SID
synchronisation error
following re-programming
Check power and ground supplies to CJB and RKE
module. Check CAN communications between CJB
and RKE module. Re-synchronise ID by
re-configuring the RKE module as a new module B102B-87
Passive Key - Missing
message
CJB fault
Low speed CAN fault
RKE module fault
Key fob battery low/battery
contact issue
Interference from other RF
signal
EMC/noise
Receiver fault
Receiver not programmed
correctly
Serial communications fault
(between receiver and RKE
module)
Key fault
Passive antenna fault
Confirm placement of key
within vehicle
Check power and ground supplies to CJB, RKE
module and receiver. Check CAN communications
between CJB and instrument cluster. Check key
fob battery. Confirm vehicle surroundings, move
vehicle. Check CAN network for interference/EMC
related issues. Disconnect battery, then
re-connect - confirm operation by re-programming
keys. Check serial circuit between receiver and
RKE module. Confirm spare key works. Refer to
the electrical circuit diagrams and test circuits to
all 3 antennas. Check whereabouts of key B1084-13
Boot/Trunk Motor
Close Switch - Circuit
open
Trunk latch open signal
circuit - open circuit
Refer to the electrical circuit diagrams and check
trunk latch open signal circuit for open circuit B1087-83
LIN Bus "A" - Value of
signal protection
calculation incorrect
Checksum of the received
LIN frame from battery
backed sounder, roof header
console, and/or rain/light
sensor is incorrect
Check operation of rain/light sensor by covering
sensor or applying water to screen, install a new
sensor as required B1087-88 LIN Bus "A" - Bus off
Bus off. Battery backed
sounder, roof header
console, and/or rain/light
sensor LIN circuit - short to
ground, power
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Refer to the electrical circuit diagrams
and check battery backed sounder, roof header
console, and rain/light sensor LIN circuit for short
to ground, power B108A-11
Start Button - Circuit
short to ground
Start/Stop switch analogue
input circuits 1 or 2 - short
to ground
Refer to the electrical circuit diagrams and check
Start/Stop switch analogue input circuits 1 and 2
for short to ground B108A-12
Start Button - Circuit
short to battery
Start/Stop switch analogue
input circuits 1 or 2 - short
to power
Refer to the electrical circuit diagrams and check
Start/Stop switch analogue input circuits 1 and 2
for short to power B1095-12
Wiper On/Off Relay -
Circuit short to battery
Wiper On/Off relay control
circuit - short to power
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Refer to the electrical circuit diagrams
and check wiper On/Off relay control circuit for www.JagDocs.com

DTC Description Possible Causes Action B1082-49
Right Temperature
Damper Motor -
Internal electronic
failure
Right hand blend
stepper motor internal
electronic failure
Suspect the right hand blend stepper motor. Check and
install a new stepper motor as required, refer to the new
module/component installation note at the top of the DTC
Index B1083-01
Recirculation
Damper Motor -
General electrical
failure
RECIRC servo motor
circuits - short to
ground, power, open
circuit
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check RECIRC servo motor
circuit for short to ground, power, open circuit B1085-00
Defroster Damper
Motor - No sub
type information
Defrost stepper motor
internal or external
fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B1085-49
Defroster Damper
Motor - Internal
electronic failure
Defrost stepper motor
internal electronic
failure
Suspect the defrost stepper motor. Check and install a new
stepper motor as required, refer to the new
module/component installation note at the top of the DTC
Index B1086-00
Air Distribution
Damper Motor -
No sub type
information
Panel/foot stepper
motor internal or
external fault
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B1086-49
Air Distribution
Damper Motor -
Internal electronic
failure
Panel/foot stepper
motor internal
electronic failure
Suspect the panel/foot stepper motor. Check and install a
new stepper motor as required, refer to the new
module/component installation note at the top of the DTC
Index B1087-88
LIN Bus "A" - Bus
off
LIN Bus power #1
circuit - open circuit
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check LIN Bus power #1
circuit for open circuit B1088-88
LIN Bus "B" - Bus
off
LIN Bus power #2
circuit - open circuit
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check LIN Bus power #2
circuit for open circuit B11ED-68
Electric Heater
Control Module -
Event information
Event information.
Electric heater - invalid
communication
message
Clear DTC. With engine coolant temperature low, set
climate temperature to high and re-test. If DTC remains in
isolation suspect the PTC heater, check and install a new
heater as required, refer to the new module/component
installation note at the top of the DTC Index. If additional
LIN related DTCs are logged refer to the Actions for these
DTCs B11ED-87
Electric Heater
Control Module -
Missing message
Electric heater -
missing communication
message
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system B11ED-96
Electric Heater
Control Module -
Component
internal failure
Component internal
failure
Suspect the PTC heater, check and install a new heater as
required, refer to the new module/component installation
note at the top of the DTC Index B11ED-98
Electric Heater
Control Module -
Component or
system over
temperature
Component or system
over temperature
Clear DTC. With engine coolant temperature low, set
climate temperature to high and re-test. If DTC remains
suspect the PTC heater, check and install a new heater as
required, refer to the new module/component installation
note at the top of the DTC Index B11EE-01
A/C Compressor -
General electrical
failure
Air conditioning
compressor clutch
solenoid circuits - short
to ground, power, open
circuit
Carry out any pinpoint tests associated with this DTC using
the manufacturer approved diagnostic system. Refer to the
electrical circuit diagrams and check air conditioning
compressor clutch solenoid circuits for short to ground,
power, open circuit

DTC Description Possible Causes Action B100A-51 Fuel Pump Authorisation
- Not programmed
RJB fault
Low speed CAN fault
Instrument cluster fault
Check power and ground supplies to RJB. Check CAN
communications between RJB and instrument
cluster. Check power and ground supplies to
instrument cluster B100A-62 Fuel Pump Authorisation
- Signal compare failure
Low speed CAN fault
RJB fault
Instrument cluster fault
Incorrect module
installed
(RJB/Instrument cluster)
Write target SID
synchronisation error
following
re-programming
Noise/EMC related error
Check CAN communications between RJB and
instrument cluster. Check power and ground supplies
to RJB and instrument cluster. Confirm correct
module installed. Re-synchronise ID by
re-configuring the RJB as a new module. Check CAN
network for interference/EMC related issues B100A-63 Fuel Pump Authorisation
- Circuit/component
protection time-out
RJB fault
Low speed CAN fault
Instrument cluster fault
Low battery voltage <9V
Check power and ground supplies to RJB and
instrument cluster. Check CAN communications
between RJB and instrument cluster. Check battery
is in fully charged and serviceable condition, refer to
the battery care manual B1026-12
Steering Column Lock -
Circuit short to battery
Steering column lock
ground circuit - short to
power
Refer to the electrical circuit diagrams and check
steering column lock ground circuit for short to
power B1087-83
LIN Bus "A" - Value of
signal protection
calculation incorrect
The checksum of the
received LIN frame is
incorrect
Check the battery monitoring system and rear
parking aid system for DTCs and refer to relevant
DTC Index B1087-86
LIN Bus "A" - Signal
invalid
The header of the LIN
message received is
incorrect
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Check the battery monitoring system and rear
parking aid system for DTCs and refer to relevant
DTC Index B1087-88 LIN Bus "A" - Bus off
Battery monitoring
system LIN circuit -
short to ground, power
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check
battery monitoring system LIN circuit for short to
ground, power B108A-23
Start Button - Signal
stuck low
Start/Stop switch digital
input signal circuit -
stuck low
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check
Start/Stop switch digital input signal circuit for short
to ground B10A1-11 Trailer Tow Detection -
Circuit short to ground
Trailer tow detection
digital input circuit -
short to ground
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check
trailer tow detection digital input circuit for short to
ground B10AF-12
Blower Fan Relay -
Circuit short to battery
High Side output not
driven - Diagnosis
feedback indicates
output is short to power
Refer to the electrical circuit diagrams and check
blower motor supply circuit for short to power B10AF-14
Blower Fan Relay -
Circuit short to ground
or open
High Side output not
driven - Diagnosis
feedback indicates
output is short to
ground, open circuit
Refer to the electrical circuit diagrams and check
blower motor supply circuit for short to ground, open
circuit

DTC Description Possible Causes Action or short to power short to power B1124-11
Lamp Fade Control -
Circuit short to ground
Interior lamp fade
control circuit - short to
ground
Refer to the electrical circuit diagrams and check
interior lamp fade control circuit for short to ground B1124-12
Lamp Fade Control -
Circuit short to battery
Interior lamp fade
control circuit - short to
power
Refer to the electrical circuit diagrams and check
interior lamp fade control circuit for short to power B113C-12
Hazard Switch
Illumination - Circuit
short to battery
Hazard switch
illumination control
circuit - short to power
Refer to the electrical circuit diagrams and check
hazard switch illumination control circuit for short to
power B113C-14
Hazard Switch
Illumination - Circuit
short to ground or open
Hazard switch
illumination control
circuit - short to ground,
open circuit
Refer to the electrical circuit diagrams and check
hazard switch illumination control circuit for short to
ground, open circuit B113E-12
External Boot/Trunk
Release Switch - Circuit
short to battery
External luggage
compartment lid release
switch digital input
circuit - short to power
Refer to the electrical circuit diagrams and check
external luggage compartment lid release switch
digital input circuit for short to power B113E-23
External Boot/Trunk
Release Switch - Signal
stuck low
External luggage
compartment lid release
switch digital input
circuit - signal stuck low
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check
external luggage compartment lid release switch
digital input circuit for short to ground B11D9-49
Vehicle Battery -
Internal electronic
failure
Vehicle battery
damaged/worn out
Check battery is in fully charged and serviceable
condition using the Midtronics battery tester and
the battery care manual B11DB-49
Battery Monitoring
Module - Internal
electronic failure
Internal electronic
failure
Suspect the battery monitoring module. Check and
install a new module as required, refer to the new
module/component installation note at the top of
the DTC Index B11DB-87
Battery Monitoring
Module - Missing
message
Battery monitoring
module connector
dis-connected/poor
connection
Battery monitoring
module to RJB LIN
circuit - open circuit
Battery monitoring
module to battery
positive monitor circuit -
open circuit
Battery monitoring
module/RJB failure
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
If additional DTCs B108783, B108786, B108787 are
logged, suspect the RJB. Check and install a new
RJB as required, refer to the new module/component
installation note at the top of the DTC Index. If
additional DTCs B108783, B108786, B108787 are
NOT logged, check for good/clean contact at battery
monitoring module connector, refer to electrical
circuit diagrams and check battery monitoring
module to RJB LIN circuit and battery monitoring
module to battery positive monitor circuit for open
circuit. Clear DTC and repeat automated diagnostic
procedure using manufacturer approved diagnostic
system. If DTC remains suspect the battery
monitoring module, check and install a new battery
monitoring module as required, refer to the new
module/component installation note at the top of
the DTC Index B123A-11 Left Front Turn Indicator
- Circuit short to ground
Left front turn signal
lamp control circuit -
short to ground
Refer to the electrical circuit diagrams and check left
front turn signal lamp control circuit for short to
ground B123A-12 Left Front Turn Indicator
- Circuit short to battery
Left front turn signal
lamp control circuit -
short to power
Refer to the electrical circuit diagrams and check left
front turn signal lamp control circuit for short to
power

DTC Description Possible Causes Action P2764-11 Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low -
Circuit Short to Ground
Torque converter clutch
pressure control solenoid
control Circuit Short to
Ground
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2764-1A Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low -
Circuit Resistance Below Threshold
Torque converter clutch
pressure control solenoid
control circuit resistance
below threshold
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2764-1E Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low -
Circuit Resistance Out Of
Range
Torque converter clutch
pressure control solenoid
control circuit resistance
out of range
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2807-11
Pressure Control Solenoid
G - Circuit Short to
Ground
Park solenoid Circuit
Short to Ground
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2807-12
Pressure Control Solenoid
G - Circuit Short to
Battery
Park solenoid Circuit
Short to Power
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2807-13
Pressure Control Solenoid
G - Circuit Open
Park solenoid Circuit
Open Circuit
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. P2807-14
Pressure Control Solenoid
G - Circuit Short to
Ground or Open
Park solenoid Circuit
Short to Ground or Open
Circuit
Carry out any diagnostic pinpoint tests associated
with this DTC using the manufacturer approved
diagnostic system. Suspect the Transmission
Control Module. Install a new Transmission Control
Module as required, refer to the warranty policy
and procedures manual if a module/component is
suspect. B1087-82
LIN Bus "A" - Alive /
sequence counter
incorrect / not updated
Alive counter fault
Check Transmission Shift Module for stored DTCs.
Refer to the electrical Circuit diagrams and check
Transmission Control Module to Transmission Shift
Module for Short to Ground or Open Circuit (LIN
Bus) B1087-83
LIN Bus "A" - Value of
signal protection
calculation incorrect
Checksum error
Check Transmission Shift Module for stored DTCs
Refer to the electrical Circuit diagrams and check
Transmission Control Module to Transmission Shift
Module for Short to Ground or Open Circuit (LIN
Bus) B1087-87
LIN Bus "A" - Missing
message
Transmission Shift
Module is NOT visible to
the Transmission Control
Module on the LIN Bus
Check Transmission Shift Module for stored DTCs
Refer to the electrical Circuit diagrams and check
Transmission Control Module to Transmission Shift
Module for Short or Open Circuit (LIN Bus) B1087-88 LIN Bus "A" - Bus off
LIN Bus Circuit fault.
Check hardware of LIN
connection between
transmission and
Transmission Shift
Module
Refer to the electrical Circuit diagrams and check
Transmission Control Module to Transmission Shift
Module LIN bus circuit for Short, Open Circuit.
Check Transmission Shift Module for related DTCs U0001-88
High Speed CAN
Communication Bus - Bus
off
CAN Bus off
Refer to the electrical Circuit diagrams and check
CAN Bus for Circuit fault

Published: 17-Apr-2014
General Information - Diagnostic Trouble Code (DTC) Index DTC: Transmission
Shift Module (GSM)
Description and Operation

Gear Shift Module (GSM)


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle
NOTES:


If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the
warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation
of a new module/component


Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to
the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the
manufacturer-approved diagnostic system)


When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places and with a
current calibration certificate. When testing resistance, always take the resistance of the digital multimeter leads into account


Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests


Inspect connectors for signs of water ingress, and pins for damage and/or corrosion


If diagnostic trouble codes are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent
concern may be the cause. Always check for loose connections and corroded terminals


Where an 'on demand self-test' is referred to, this can be accessed via the 'diagnostic trouble code monitor' tab on the
manufacturers approved diagnostic system


Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific
customer complaint and carry out the recommendations as needed

The table below lists all diagnostic trouble codes (DTCs) that could be logged in the gear shift module, for additional diagnosis
and testing information refer to the relevant diagnosis and testing section.
For additional information, refer to: External Controls (307-05 Automatic Transmission/Transaxle External Controls - V6 3.0L
Petrol, Diagnosis and Testing).

DTC Description Possible Causes Action B1087-08
LIN Bus "A" - Bus
Signal / Message
Failures
LIN bus 'A' Error
Refer to the electrical circuit diagrams and
check LIN input signal circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance B1087-81 LIN Bus "A" -
Invalid serial data
received
Transmission control module LIN
message error - LIN/CAN signal
mismatch (complement fault)
Refer to the electrical circuit diagrams and
check LIN input signal circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance. Check transmission
control module for related DTCs and refer to
relevant DTC index B1087-82 LIN Bus "A" - Alive / sequence counter
incorrect / not
updated
Transmission control module LIN
message error - Alive counter fault
Refer to the electrical circuit diagrams and
check LIN input signal circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance. Check transmission
control module for related DTCs and refer to
relevant DTC index

DTC Description Possible Causes Action B1087-83
LIN Bus "A" - Value
of signal protection
calculation
incorrect
Transmission control module LIN
message error - checksum fault
Refer to the electrical circuit diagrams and
check LIN input signal circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance. Check transmission
control module for related DTCs and refer to
relevant DTC index B1087-87 LIN Bus "A" -
Missing message
Transmission control module LIN
message error - Missing message
Refer to the electrical circuit diagrams and
check LIN input signal circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance. Check transmission
control module for related DTCs and refer to
relevant DTC index B1142-62
Ignition Status 1 -
Signal compare
failure
Hardwired ignition and CAN
powermode signals differ
Refer to the electrical circuit diagrams and
check ignition supply circuit for short circuit
to ground, short circuit to power, open
circuit, high resistance B123C-01
Dynamic Stability
Control Status
Indicator - General
Electrical Failure
Dynamic stability control LED failure
Check transmission shift module, check
operation of the dynamic stability control
button status illumination, check and install
new transmission shift module as required.
Refer to the warranty policy and procedures
manual, or determine if any prior approval
programme is in operation, prior to the
installation of a new module B123D-64
Dynamic Stability
Control Button -
Signal plausibility
failure
Dynamic stability control button may
be stuck, may be due to a faulty
button or to the user holding the
button for a prolonged period
(dynamic stability control button
detected as pressed for 30 seconds)
(S1)
Check for normal dynamic stability control
button functionality. If it operates normally
then no further action required. If the
dynamic stability control button fails to
operate normally then may be due to an
internal fault, check and install new
transmission shift module as required. Refer
to the warranty policy and procedures
manual, or determine if any prior approval
programme is in operation, prior to the
installation of a new module B123F-01
Adaptive Speed
Limiter Mode
Indicator - General
Electrical Failure
Adaptive speed limiter LED failure
Check transmission shift module, check
operation of the active speed limiter button
status illumination, check and install new
transmission shift module as required. Refer
to the warranty policy and procedures
manual, or determine if any prior approval
programme is in operation, prior to the
installation of a new module B1241-64
Adaptive Speed
Limiter Button -
Signal plausibility
failure
May be due to a faulty button or to
the user holding the button for a
prolonged period (adaptive speed
limiter button detected as pressed
for 30 seconds)
Check for normal adaptive speed limiter
button functionality. If it operates normally
then no further action required. If the
adaptive speed limiter button fails to
operate normally then may be due to an
internal fault, check and install new
transmission shift module as required. Refer
to the warranty policy and procedures
manual, or determine if any prior approval
programme is in operation, prior to the
installation of a new module B1242-64
Winter Button -
Signal plausibility
failure
May be due to a faulty button or to
the user holding the button for a
prolonged period (winter button
detected as pressed for 30 seconds)
Check for normal winter button functionality.
If it operates normally then no further action
required. If the winter button fails to operate
normally then may be due to an
internal fault, check and install new
transmission shift module as required. Refer
to the warranty policy and procedures
manual, or determine if any prior approval
programme is in operation, prior to the
installation of a new module www.JagDocs.com

DTC Description Possible Cause Action P2764-11 Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low - Circuit
Short to Ground
Torque converter clutch
pressure control solenoid
control Circuit Short to
Ground Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2764-1A Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low-Circuit
Resistance Below Threshold
Torque converter clutch
pressure control solenoid
control circuit resistance
below threshold Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2764-1E Torque Converter Clutch
Pressure Control Solenoid
Control Circuit Low-Circuit
Resistance Out Of Range
Torque converter clutch
pressure control solenoid
control circuit resistance
out of range Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the
top of the DTC Index P2807-11 Pressure Control Solenoid G
- Circuit Short to Ground
Park solenoid Circuit
Short to Ground Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2807-12 Pressure Control Solenoid G
- Circuit Short to Battery
Park solenoid Circuit
Short to Power Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2807-13 Pressure Control Solenoid G
- Circuit Open
Park solenoid Circuit
Open Circuit Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index P2807-14 Pressure Control Solenoid G
- Circuit Short to Ground or
Open
Park solenoid Circuit
Short to Ground or Open
Circuit Carry out any diagnostic pinpoint tests associated
with this DTC using the manufacturer approved
diagnostic system. Suspect the Transmission control
module. Install a new Transmission control module as
required, refer to the new module/component
installation note at the top of the DTC Index B1087-82
LIN Bus "A" - alive /
sequence counter incorrect /
not updated
Alive counter fault Check Transmission Shift Module for stored DTCs.
Refer to the electrical Circuit diagrams and check
Transmission control module to Transmission Shift
Module for Short to Ground or Open Circuit (LIN Bus) B1087-83
LIN Bus "A" - value of signal
protection calculation
incorrect
Checksum error Check Transmission Shift Module for stored DTCs Refer
to the electrical Circuit diagrams and check
Transmission control module to Transmission Shift
Module for Short to Ground or Open Circuit (LIN Bus) B1087-87
LIN Bus "A" - missing
message
GSM is NOT visible to the
Transmission control
module on the LIN Bus Check Transmission Shift Module for stored DTCs Refer
to the electrical Circuit diagrams and check
Transmission control module to Transmission Shift
Module for Short or Open Circuit (LIN Bus) B1087-88 LIN Bus "A" - Bus off
LIN Bus Circuit fault.
Check hardware of LIN
connection between
transmission and GSM Refer to the electrical Circuit diagrams and check
Transmission control module to Transmission shift
module for Short, Open Circuit (LIN Bus). Check
Transmission Shift Module for related DTCs U0001-88
High Speed CAN
Communication Bus - Bus off
CAN Bus off Refer to the electrical Circuit diagrams and check CAN
Bus for Circuit fault U0100-82
Lost Communication With
Engine control module/PCM
"A" - alive / sequence
counter incorrect / not updated
Alive counter fault Check Engine control module for stored DTCs U0100-83
Lost Communication With
Engine control module/PCM
"A" - value of signal
protection calculation
incorrect
Checksum fault Check Engine control module for stored DTCs U0100-87
Lost Communication With
Engine control module/PCM
"A" - missing message
CAN Timeout
NOTE: Do NOT install a new Engine control
module if an Engine control module Timeout DTC is
only logged in the Transmission control module, the
failure is NOT with the Engine control module

Check Engine control module for stored DTCs. Check
CAN Bus Circuit for fault