
Published: 12-May-2014
General Information - Diagnostic Trouble Code (DTC) Index DTC: Rear
Junction Box (RJB)
Description and Operation
Rear Junction Box (RJB)
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 a 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
an up-to-date 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 DTCs 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.
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 required.
The table below lists all Diagnostic Trouble Codes (DTCs) that could be logged in the Rear Junction Box (RJB). For additional
diagnosis and testing information, refer to the relevant Diagnosis and Testing section in the workshop manual.
For additional information, refer to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
DTC Description Possible Causes Action P0460-11
Fuel Level Sensor A
Circuit - Circuit short to
ground
Fuel level sensor A
analogue 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
fuel level sensor A analogue input circuit for short to
ground P0460-15
Fuel Level Sensor A
Circuit - Circuit short to
battery or open
Fuel level sensor A
analogue input circuit -
short to power, open
circuit
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system.
Refer to the electrical circuit diagrams and check
fuel level sensor A analogue input circuit for short to
power, open circuit P0571-12
Brake Switch A Circuit -
Circuit short to battery
Footbrake switch digital
input signal circuits -
short to power
Refer to the electrical circuit diagrams and check
footbrake switch digital input signal circuits for
short to power P1230-12
Fuel Pump Low Speed
Malfunction (VLCM) -
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
fuel pump delivery module for short to power

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 U0155-00
Lost Communication
With Instrument Panel
Cluster (IPC) Control
Module - No sub type
information
No sub type information
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system U0159-00
Lost Communication
With Parking Assist
Control Module "A" - No
sub type information
No sub type information
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system U0164-00
Lost Communication
With HVAC Control
Module - No sub type
information
No sub type information
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system U0214-00
Lost Communication
With Remote Function
Actuation - No sub type
information
No sub type information
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system U0300-46
Internal Control Module
Software Incompatibility
- Calibration/parameter
memory failure
Calibration/parameter
memory failure
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 U1000-00
Solid State Driver
Protection Active -Driver
Disabled - No sub type
information
No sub type information
Carry out any pinpoint test associated with this DTC
using the manufacturer approved diagnostic system U1A14-49
CAN Initialisation
Failure - Internal
electronic failure
Internal electronic
failure
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 U3000-49
Control Module -
Internal electronic
failure
Internal electronic
failure
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 U3000-55
Control Module - Not
configured
Not configured
Re-configure the RJB using the manufacturer
approved diagnostic system www.JagDocs.com

DTC Description Possible Causes Action U0142-00
Lost Communication
With Body Control
Module "B" - No
subtype information
Missing message from
RJB
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Carry out CAN network integrity test using
the manufacturer approved diagnostic system. Refer
to the electrical circuit diagrams and check power
and ground supplies to RJB U0155-00
Lost Communication
With Instrument Panel
Cluster (IPC) Control
Module - No subtype
information
Missing message from
instrument cluster
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Carry out CAN network integrity test using
the manufacturer approved diagnostic system. Refer
to the electrical circuit diagrams and check power
and ground supplies to instrument cluster U0300-00
Internal Control
Module Software
Incompatibility - No
subtype information
Invalid configuration
message is received
Re-configure the RJB using the manufacturer
approved diagnostic system. Clear the DTC and
retest. If the DTC is still logged suspect the remote
keyless entry module, refer to the new module
installation note at the top of the DTC Index U201F-00
External Receiver - No
subtype information
No subtype information -
communication error
Suspect the RF receiver, check and install a new RF
receiver as required, refer to the new
module/component installation note at top of DTC
Index U201F-13
External Receiver -
Circuit open
Line open
Refer to the electrical circuit diagrams and test RF
receiver communication circuit to remote keyless
entry module for short to ground or open circuit U201F-87
External Receiver -
Missing message
Transmission error
Refer to the electrical circuit diagrams and check
the data line between the RF receiver and the
remote keyless entry module for short, open circuit.
Suspect the RF receiver or remote keyless entry
module, check and install a new RF receiver or
remote keyless entry module as required, refer to
the new module/component installation note at top
of DTC Index U2100-00
Initial Configuration
Not Complete - No
subtype information
No subtype information
Configure the Remote Keyless Entry module using
the manufacturer approved diagnostic system U2101-00
Control Module
Configuration
Incompatible - No subtype information
No subtype information
Re-configure the RJB using the manufacturer
approved diagnostic system U3000-49
Control Module -
Internal electronic
failure
Internal electronic failure
Install a new remote keyless entry module, refer to
the new module installation note at the top of the
DTC Index U3002-81
Vehicle Identification
Number - Invalid serial
data received
Vehicle/component
mis-match. Module
previously installed to
other vehicle
Install correct/new module to vehicle specification,
refer to the new module/component installation
note at the top of the DTC Index U3003-62
Battery Voltage -
Signal compare failure
Mis-match in battery
voltage, of 2 volts or
more, between remote
keyless entry module and
RJB
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system
Refer to the relevant section of the workshop
manual and test the battery and charging system

Published: 12-May-2014
General Information - Diagnostic Trouble Code (DTC) Index DTC: Speed
Control Module (CCM)
Description and Operation
Adaptive Speed Control Module (ASCM)
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 a 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
an up-to-date 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 DTCs 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.
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 required.
The table below lists all Diagnostic Trouble Codes (DTCs) that could be logged in the Adaptive Speed Control Module (ASCM).
For additional diagnosis and testing information, refer to the relevant Diagnosis and Testing section in the workshop manual.
For additional information, refer to: Speed Control (310-03C Speed Control - V8 5.0L Petrol/V8 S/C 5.0L Petrol, Diagnosis and Testing).
DTC Description Possible Causes Action B1A84-81 Car Configuration Data
- Invalid serial data
received
RJB reporting invalid
data
Re-configure the RJB using manufacturer approved
diagnostic system C1A67-54 Forward Looking Sensor
- Missing calibration
Speed control sensor out
of alignment
Check speed control sensor for correct vertical
alignment, and carry out speed control sensor
alignment procedure using manufacturer approved
diagnostic system C1A67-81 Forward Looking Sensor
- Invalid serial data
received
Yaw voltage
unreasonable for 0.5
seconds or unchanged
for 1.2 seconds. Note:
Yaw sensor internal to
speed control sensor
Clear DTC and re-test, if DTC remains suspect speed
control sensor. Check and install a new sensor as
required, refer to the new module/component
installation note at the top of the DTC Index C1A67-87 Forward Looking Sensor
- Missing Message
Incorrect or missing data
from speed control
sensor
Carry out any pinpoint tests associated with this
DTC using the manufacturer approved diagnostic
system. Refer to the electrical circuit diagrams and
check power and ground supplies for short, open
circuit. Check private CAN network between speed
control sensor and speed control module for failure,
clear DTC and re-test. If DTC remains suspect the

DTC Description Possible Causes Action U0300-00
Internal Control Module
Software
Incompatibility - No
sub type information
Invalid configuration
message is received
Re-configure the speed control module using the
manufacturer approved diagnostic system. Clear
DTCs and re-test. If DTC still logged, suspect
incorrect speed control module installed. Check and
install a new module as required, refer to new
module/component installation note at top of DTC
Index U0300-55
Internal Control Module
Software
Incompatibility - Not
configured
RJB - at least one of the
car configuration
parameters is not
configured
Re-configure the RJB using the manufacturer
approved diagnostic system U0401-00
Invalid Data Received
From ECM/PCM A - No
sub type information
ECM did not respond
properly to speed control
cancel or auto brake
cancel request
Check ECM for related DTCs and refer to relevant
DTC Index U0401-67
Invalid Data Received
From ECM/PCM A -
Signal incorrect after
event
ECM did not respond
properly to speed control
resume request
Check ECM for related DTCs and refer to relevant
DTC Index U0401-81
Invalid Data Received
From ECM/PCM A -
Invalid serial data
received
Invalid data received
from engine control
module
Bus signal/message
failure
Speed control inhibited
by ECM
Check the Engine Control Module for related DTCs
and refer to relevant DTC Index. If U040181 is
logged as historic but no other DTCs have logged in
the engine control module at the same time and
distance, it may be caused by cranking with low
voltage conditions. Check battery and charging
system according to instructions in the battery care
manual. Install the latest Engine Control Module
software using the manufacturer approved diagnostic
system, contact Dealer Technical Support before
replacing components U0415-53
Invalid Data Received
From Anti-Lock Braking
System (ABS) Control
Module - De-activated
Event information
Deactivated
Check the Anti-Lock Braking System Module for
related DTCs and refer to the relevant DTC index U0415-81
Invalid Data Received
From Anti-lock Brake
System (ABS) Control
Module - Invalid serial
data received
Stability assist fault
Check ABS module for related DTCs and refer to
relevant DTC Index U0417-67
Invalid Data Received
From Park Brake
Control Module - Signal
incorrect after event
Parking brake module did
not respond properly to
apply request
Check parking brake module for related DTCs and
refer to relevant DTC Index U0417-81
Invalid Data Received
From Park Brake
Control Module -
Invalid serial data
received
Speed control inhibited
by parking brake module
Check parking brake module for related DTCs and
refer to relevant DTC Index U0418-68
Invalid Data Received
From Brake System
Control Module - Event
information
Event information
Check the Anti-Lock Braking System Module for
related DTCs and refer to the relevant DTC index U0421-81
Invalid Data Received
From Suspension
Control Module 'A' -
Invalid serial data
received
Invalid serial data
received
Check the Suspension Control Module for related
DTCs and refer to the relevant DTC index U0423-81
Invalid Data Received
From Instrument Panel
Control Module -
Invalid serial data
received
Speed control inhibited
by instrument cluster
Check instrument cluster, CJB and RJB for related
DTCs and refer to relevant DTC Index U1A00-88
Private Communication
Network - Bus off
Bus off
The module setting this code has disabled CAN
transmission. Check for other bus off codes. Check
the module and circuits. Refer to the electrical circuit
diagrams. Clear all DTCs and road test the vehicle. If
the concern reoccurs contact Dealer Technical

DTC Description Possible Causes Action Support for further advice. Under no circumstance
should any parts be replaced to overcome this issue U1A14-49
CAN Initialisation
Failure - Internal
electronic failure
Internal electronic failure
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U2101-00
Control Module
Configuration
Incompatible - No sub
type information
Data sent from RJB is
invalid
Check/amend Car Configuration File using the
manufacturer approved diagnostic system, clear DTC
and re-test. If DTC remains, re-configure RJB using
manufacturer approved diagnostic system, clear DTC
and re-test. If DTC remains check RJB for DTCs and
refer to DTC Index U3000-41
Control Module -
General checksum
failure
Internal micro controller
error
Checksum fault
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-42
Control Module -
General memory failure
Internal RAM test fault
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-49
Control Module -
Internal electronic
failure
Internal control module
failure
Suspect the speed control module. Check and install
a new module as required, refer to the new
module/component installation note at the top of
the DTC Index U3000-63
Control Module -
Circuit/component
protection time-out
Circuit/component
protection time-out
The Control module internal protection has been
activated. Check for other related DTCs that could
lead to this event. Clear the DTC and retest. If the
problem persists, renew the module. Refer to the
warranty policy and procedures manual if a module is
suspect U3003-62
Battery Voltage -
Signal compare failure
Signal compare failure
Battery supply voltage
below a recognized value
Check vehicle battery and charging system. Refer to
the relevant section in the workshop manual. Refer
to the electrical circuit diagrams and check the power
and ground supply circuits to the modules www.JagDocs.com