Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 551

Published: 11-May-2011

Module Communications Network - Communications NetworkVIN Range:
E96603->J28492

Diagnosis and Testing

Principles of Operation

The vehicle has four module communication networks. Only three of which are connected to the diagnostic connector. The standard
corporate protocol (SCP) and controller area network (CAN), which are an unshielded twisted pair cable: data bus + and data bus - and
the International Standard Organization (ISO) 9141 communication network, which is a single wire network.

The domestic data bus (D2B), which is a fibre optic ring network, can be diagnosed through the SCP network, and with the optical bus
tester.

The SCP, CAN and ISO networks can be connected to the Jaguar approved diagnostic system by one diagnostic connector. This makes
troubleshooting these systems easier by allowing one smart tester to be able to diagnose any module on the three networks from one
connector. On-board diagnosis of the D2B network is through the in car entertainment (ICE) head.

The diagnostic connector is located under the instrument panel.

The ISO 9141 communications network does not permit inter-module communications. When the Jaguar approved diagnostic system
communicates with modules on the ISO 9141 communication network, the diagnostic system must ask for all information, the modules will
not initiate communications.

The SCP communication network remains operational even with severing of one of the bus wires. Communications will also continue if one
of the bus wires is shorted to ground or battery positive voltage (B+), or if some (but not all) termination resistors are lost.

Unlike the SCP communication network, the ISO 9141 communication network will not function if the wire is shorted to ground or battery
positive voltage (B+). Also, if one of the modules on the ISO 9141 network loses power or shorts internally, communication to that module
will fail.

The anti-lock brake control module is connected to the CAN communication network. The module comes in two forms. The first type is the
standard equipped anti-lock brake system (ABS) with traction control. It controls the brake pressure to the four wheels to keep the vehicle
under control while braking. The second type of ABS is optional and is called dynamic stability control (DSC). This module adds yaw and
steering wheel angle sensors to the package to help in sensing a loss of vehicle control. For additional information,
REFER to:

Anti-Lock Control - Stability Assist

(206-09 Anti-Lock Control - Stability Assist, Description and Operation).

The in car entertainment (ICE) head is connected to the SCP communication network and also to the D2B network. The D2B communicates
with the compact disc player, cellular phone transceiver, navigation system, amplifier, and the voice control module. For additional
information on the compact disc,
REFER to:

Audio System

(415-00 Information and Entertainment System - General Information, Diagnosis and Testing).

For additional information on the cellular phone,
REFER to:

Cellular Phone

(419-08 Cellular Phone, Diagnosis and Testing).

For additional information on the navigation system,
REFER to:

Navigation System

(419-07 Navigation System, Diagnosis and Testing).

For additional information on the amplifier,
REFER to:

Audio System

(415-01 Audio Unit, Description and Operation).

For additional information on the voice activated control system,
REFER to:

Multifunction Electronic Module

(419-10 Multifunction Electronic Modules, Diagnosis and Testing).

The electronic automatic temperature control (EATC) module is connected to the CAN communication network. The EATC module controls
automatic climate functions that maintain the vehicle at a constant temperature setting. For additional information,
REFER to:

Climate Control System

(412-00 Climate Control System - General Information, Diagnosis and Testing).

The instrument cluster (also known as an instrument cluster module ICM) is connected to the CAN and SCP communication networks. The
instrument cluster displays information received on the SCP including speedometer, odometer, fuel, and message center warnings. The
instrument cluster displays information received on the CAN including ABS, air conditioning, transmission and engine condition. The
instrument cluster also controls the passive anti-theft system (PATS). For additional information;
REFER to:

Instrument Cluster and Panel Illumination

(413-00 Instrument Cluster and Panel Illumination, Diagnosis and Testing).

For instrument cluster operation and
REFER to:

Anti-Theft - Passive

(419-01B Anti-Theft - Passive, Diagnosis and Testing).

for PATS.

The general electronic module (GEM) is connected to the SCP communication network. The GEM controls both interior and exterior lighting,
active anti-theft functions and warning chimes. For additional information on interior lamps,
REFER to:

Interior Lighting

(417-02 Interior Lighting, Diagnosis and Testing).

For additional information on exterior lighting,
REFER to:

Headlamps

(417-01 Exterior Lighting, Diagnosis and Testing).

For additional information on active anti-theft,
REFER to:

Anti-Theft - Active

(419-01A Anti-Theft - Active, Diagnosis and Testing).

For additional information on warning chimes,
REFER to:

W arning Devices

(413-09 Warning Devices, Diagnosis and Testing).

The engine control module (ECM) is connected to both the CAN and ISO 9141 communication networks. The ECM controls the engine
performance, electronic ignition, emission controls, speed control, and on board diagnostics. For additional information;
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: E96603->J28492

(303-14A Electronic Engine

Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
,
REFER to:

Electronic Engine Controls - 2.0L NA V6 - AJV6

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA

V6 - AJ27, Diagnosis and Testing).
or
REFER to:

Electronic Engine Controls

(303-14B Electronic Engine Controls - 2.0L Duratorq-TDCi/2.2L Duratorq-TDCi (110kW/150PS) - Puma,

Diagnosis and Testing).

The 'phone module is connected to the D2B communication network, and incorporates the VEMS, or Vehicle Emergency Messaging System.
The module allows a user to request emergency assistance (police, ambulance, fire, recovery) or directions to a desired location at the
touch of a button. Also, if any of the vehicle's airbags are deployed while the VEMS system is powered ON, the system automatically issues
a call for emergency assistance. For additional information,
REFER to:

Compact Disc (CD) Changer - 4-Door

(415-01 Audio Unit, Removal and Installation).

The airbag restraints module is connected to the ISO 9141 communication network. The airbag control module controls the deployment of
the air bags based on sensor input. For additional information;

REFER to:

Air Bag Supplemental Restraint System (SRS)

(501-20B Supplemental Restraint System, Diagnosis and Testing).

The voice activated control module (VACM) is connected to the D2B communication network. This allows the user to select functions by
giving a voice command. The VACM sends the command information by D2B to the correct module or audio unit.

The navigation system (NAV) is connected to the D2B communication network, and performs it's diagnostics via the SCP network. The NAV
receives inputs from the GPS antenna and various other sensors. For additional information,
REFER to:

Navigation System

(419-07 Navigation System, Diagnosis and Testing).

Inspection and Verification

1. Verify the customer concern.

1.

2. Visually inspect for obvious signs of mechanical, electrical or optical damage.

2.

Electrical

Fuses
W iring harness
Loose or corroded connections
Correct engagement of electrical connectors

Controller area network (CAN)

Instrument cluster (IC)
Steering wheel rotation sensor (SW RS)
Gear selector module (GSI)
Headlight levelling module (HID)
Yaw rate sensor
Electronic air temperature control module (EATCM)
Memory seat control module
Transmission control module (TCM)
Anti-lock brake control module with or without dynamic stability control (ABS/DSC)
Engine control module (ECM)

Standard corporate protocol (SCP)

Generic electronic module (GEM)
Instrument cluster (IC)
In-car entertainment (ICE)
Navigation system (NAV)
Engine control module (ECM)

International standards organisation (ISO)

Fuel fired heater module
Reverse park aid module
Restraints control module (RCM)
Headlight levelling module (HID)
Roof console scanner

Domestic data bus (D2B)

ICE head unit (HU)
Compact disc changer (CD)
Cellular phone module (CPM)
Voice module (VACM)
Navigation system module (NSM)
Amplifier (AMP)

Visual Inspection Chart

Optical

Routing of fibre optic harnesses
Correct engagement of optical connectors
Correct placement of optical connectors (ring order)
Damage to fibre (chafing, abrasion, kinking, cuts, etc)
Correct assembly of optical connectors (backout, etc)

Default Modes

Possible TCM default

Fixed 4th gear
Erratic gear shifts

Possible ECM default

Throttle motor and relay disabled
Throttle valve opening set to default value
Idle speed controlled by fuel injection intervention
Idle speed adaptation inhibited
Throttle opening limited to 30%
Vehicle speed limited
Speed (cruise) control limited
Maximum throttle opening for N range inhibited
Maximum engine speed reduced
HO2 sensor control circuit inhibited
Maximum ignition retard

Symptom Chart

• NOTE: Network DTCs may be set by an error or communications failure in the network. Individual DTCs are in the table, alongside their
respective modules, but may also be set by a combination of factors affecting the network, which would result in multiple DTCs being set

for one error, or, as in the case of an open circuit, no DTC being set.

DTC

Description

Possible Source

Action

P1573

CAN throttle angle error

TP sensor fault (additional
DTCs logged)
ECM CAN message error

For TP sensor circuit tests,
REFER to:

Electronic Engine Controls - 2.0L NA V6 - AJV6

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -
AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing) /

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27,
VIN Range: E96603->J28492

(303-14A Electronic Engine Controls -

2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis
and Testing).
Error message sent on CAN, but not CAN related. Check for
additional DTCs indicating cause.

P1601

Incorrect ECM or TCM
fitted to vehicle

ECM configuration
TCM configuration

Configure the modules using the Jaguar approved diagnostic
system.

P1603

TCM EEPROM failure

Battery disconnected while
the ignition switched ON
B+ power supply circuit;
open circuit
TCM failure

For TCM EEPROM tests, GO to Pinpoint Test

B.

P1609

ECM microprocessor to
microprocessor
communication failure

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

P1611

ECM sub CPU failure

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

P1633

ECM main CPU failure

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

P1634

Throttle 'watch-dog'
circuit malfunction

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

P1637

CAN ECM to ABS/TCCM or
DSC control module
network malfunction

Module power supply or
ground interruption
CAN open circuit fault;
ABS/TCCM or DSC to ECM
CAN short circuit fault
ABS/TCCM or DSC module
failure
ECM failure

Refer to power and ground test for suspect module. For ABS/TCCM
or DSC CAN circuit tests, GO to Pinpoint Test

C.

Please check part

is not on any form of prior authorisation before replacement.

P1638

CAN ECM / IC network
malfunction

Module power supply or
ground interruption
CAN open circuit fault; IC
to ECM
CAN short circuit fault
IC failure
ECM failure

Refer to power and ground test for suspect module. For IC CAN
circuit tests, GO to Pinpoint Test

D.

Please check part is not on

any form of prior authorisation before replacement.

P1642

CAN circuit malfunction

Module power supply or
ground interruption
CAN short circuit fault
Control module failure;
Check for additional logged
DTCs to locate module
source

Refer to power and ground test for suspect module. For network
short circuit tests, GO to Pinpoint Test

E.

P1643

CAN ECM / TCM network
malfunction

Module power supply or
ground interruption
CAN open circuit fault; TCM
to ECM
CAN short circuit fault
TCM failure
ECM failure

Refer to power and ground test for suspect module. For CAN open
circuit tests, GO to Pinpoint Test

A.

For network short circuit

tests, GO to Pinpoint Test

E.

Please check part is not on any form

of prior authorisation before replacement.

P1646

ECM HO2 sensor control
malfunction, right-hand
bank

HO2 sensor heater failure
HO2 sensor sensing circuit;
short circuit to ground,
short circuit to high
voltage, open circuit
ECM failure

For HO2 sensor circuit tests,
REFER to:

Electronic Engine Controls - 2.0L NA V6 - AJV6

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -
AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing) /

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27,
VIN Range: E96603->J28492

(303-14A Electronic Engine Controls -

2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis
and Testing).
Please check part is not on any form of prior authorisation before
replacement.

P1647

ECM HO2 sensor control
malfunction, left-hand
bank

HO2 sensor heater failure
HO2 sensor sensing circuit;
short circuit to ground,
short circuit to high
voltage, open circuit
ECM failure

For HO2 sensor circuit tests,
REFER to:

Electronic Engine Controls - 2.0L NA V6 - AJV6

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -
AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing) /

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27,
VIN Range: E96603->J28492

(303-14A Electronic Engine Controls -

2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis
and Testing).
Please check part is not on any form of prior authorisation before
replacement.

P1648

ECM KS self-test failure

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

P1656

TP sensor amplifier circuit
malfunction

ECM failure

Please check part is not on any form of prior authorisation before
replacement.

DTC

Description

Possible Source

Action

P1699

CAN ECM to EATCM
network malfunction

Module power supply or
ground interruption
CAN open circuit fault;
EATCM to ECM
CAN short circuit fault;
EATCM to ECM
EATCM failure
ECM failure

Refer to power and ground test for suspect module. For EATCM
open circuit tests, GO to Pinpoint Test

A.

For network short circuit

tests, GO to Pinpoint Test

F.

Please check part is not on any form

of prior authorisation before replacement.

P1777

CAN torque reduction
error

ECM CAN message error

Error message sent on CAN, but not CAN related. Check for
additional DTCs indicating cause.

P1796

CAN network malfunction

Module power supply or
ground interruption
CAN short circuit fault
TCM failure

Refer to power and ground test for suspect module. For network
short circuit test, GO to Pinpoint Test

A.

P1797

CAN TCM/ECM network
malfunction

Module power supply or
ground interruption
CAN open circuit fault; TCM
to ECM
CAN short circuit fault
TCM failure
ECM failure

Refer to power and ground test for suspect module. For TCM
open/short circuit tests, GO to Pinpoint Test

C.

P1799

CAN TCM to ABS/TCCM or
DSC module network
malfunction

Module power supply or
ground interruption
CAN short circuit fault
ABS/TCCM or DSC module
failure
TCM failure

Refer to power and ground test for suspect module. For ABS/TCCM
short circuit tests, GO to Pinpoint Test

G.

U1041

GEM SCP network invalid
vehicle speed data

ABS/DSC wheel speed
message error
SCP network error

For GEM SCP network tests, GO to Pinpoint Test

H.

U1135

GEM SCP network invalid
ignition switch data

Instrument cluster ignition
switch message error
SCP network error

For GEM SCP network tests, GO to Pinpoint Test

H.

U1147

GEM anti-theft SCP
network invalid ignition
key-in data

GEM key-in message error
SCP network error

For GEM SCP network tests, GO to Pinpoint Test

H.

U1262

GEM SCP network ignition
switch state message
missing

SCP circuit(s); open circuit
SCP network error

For GEM SCP network tests, GO to Pinpoint Test

H.

U1262

ICE SCP network circuit
fault

SCP network circuit; open
circuit, short circuit to B+,
short circuit to ground
SCP network circuit fault
Audio unit fault

For ICE SCP network tests, GO to Pinpoint Test

I.

U1900

CAN instrumentation
messages missing

Engine management, ABS,
or DSC fault
CAN network fault

For ABS/DSC CAN network tests, GO to Pinpoint Test

G.

U1900

Automatic climate control
CAN fault

CAN circuit; open circuit,
short circuit to B+, short
circuit to ground
Automatic climate control
module internal CAN fault
CAN network fault

For EATC CAN network tests, GO to Pinpoint Test

F.

U1900

ABS CAN fault

CAN circuit: open circuit,
short circuit to B+, short
circuit to ground
ABS control module
internal CAN fault
CAN network fault

For ABS/DSC CAN network tests, GO to Pinpoint Test

G.

U1900

DSC CAN fault

CAN circuit; open circuit,
short circuit to B+, short
circuit to ground
DSC control module
internal CAN fault
CAN network fault

For ABS/DSC CAN network tests, GO to Pinpoint Test

G.

U2003

CD autochanger not
responding on D2B
network

D2B network 'wake-up'
circuit; short circuit to B+,
short circuit to ground
D2B network fault

For D2B 'wake-up' circuit tests, GO to Pinpoint Test

K.

For CD

autochanger D2B network tests, GO to Pinpoint Test

J.

For D2B

permanent supply tests, GO to Pinpoint Test

R.

U2008

Cellular telephone not
responding on D2B
network

D2B network 'wake-up'
circuit; short circuit to B+,
short circuit to ground
D2B network fault

For D2B 'wake-up' circuit tests, GO to Pinpoint Test

K.

For cellular

telephone D2B network tests, GO to Pinpoint Test

L.

For D2B

permanent supply tests, GO to Pinpoint Test

R.

For D2B accessory

switched supply tests, GO to Pinpoint Test

S.

For D2B ignition

switched supply tests, GO to Pinpoint Test

T.

U2019

VACM not responding on
D2B network

D2B network 'wake-up'
circuit; short circuit to B+,
short circuit to ground
D2B network fault

For D2B 'wake-up' circuit tests, GO to Pinpoint Test

K.

For VACM

D2B network tests, GO to Pinpoint Test

M.

For D2B accessory

switched supply tests, GO to Pinpoint Test

S.

For D2B ignition

switched supply tests, GO to Pinpoint Test

T.