Ford Falcon. Manual — part 383

418-00-3

Module Communications Network

418-00-3

DESCRIPTION AND OPERATION

Communications Network

The module communications network consists of the

following items:

High Speed Controller Area Network (HS-CAN)

communications network.
International Standards Organization (ISO) 9141

communications network
Anti-lock Braking System and Traction Control

System (ABS/TCS) {*or ABS Module}
Interior Command Centre (ICC) {*or ACM}
Body Electronics Module (BEM)
HVAC Integrated Module (HIM)
Instrument Cluster (IC) {*or Cluster}
Parking Aid Module (PAM) {*or Sonar Module}
Powertrain Control Module (PCM) {*or EEC-B}
Restraints Control Module (RCM) {*or ARS}
Data Link Connector (DLC)

NOTE: The abbreviations shown in { } may also be

shown on wiring diagrams.

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Module Communications Network

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DIAGNOSIS AND TESTING

The following modules are linked to the HS-CAN

Communications Network

communication network:

Refer to Wiring Diagram Section 418-00 for schematic

Anti-lock Braking System and Traction Control

and connector information.

System ABS/TCS - Operation only, diagnostics

via ISO9141

Special Tool(s)

Audio Control Module (ACM)

73III Automotive Meter

Body Electronics Module (BEM)

105-R0057 or equivalent

HVAC Integrated Module (HIM)
Instrument Cluster (IC)
Powertrain Control Module (PCM)

The HS-CAN network is terminated at one end by the

PCM, with the other end terminated by the IC.

Additionally, the DLC and the remaining HS-CAN

Worldwide Diagnostic System

modules are connected to this bus.

(WDS)

For information on operation of individual modules

please refer to the relevant sections.

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical

damage.

Principles of Operation

Visual Inspection Chart

The vehicle has two module communications

Electrical

networks.

Wiring harness

The High Speed Controller Area Network (HS-CAN),

Electrical connectors

which is an unshielded twisted pair cable (data bus

Central junction box (CJB) Fuses

plus, CAN High, circuit 914 [BR-Y] and data bus

Modules:

minus, CAN Low, circuit 915 [P-L]); and the

International Standards Organization (ISO) 9141

ABS/TCS module

network which is a single wire (circuit 70 [SB-W]). The

ABS/EVAC FILL module

diagnostic tool can connect to both networks through

ACM

the Data Link Connector (DLC). This makes diagnosis

and testing of these systems easier by allowing one

BEM

smart tester to be able to diagnose and control any

HIM

module on the two networks from one connector.

IC

The ISO 9141 communication network does not

PAM

permit inter-module communication. When the

PCM

diagnostic tool communicates to modules on the ISO

9141 communication network, the diagnostic tool must

RCM

ask for all information; the modules cannot initiate

3. If the concern remains after the inspection,

communications.

connect the diagnostic tool to the Data Link

The ISO 9141 communication network will not

Connector (DLC) and select the vehicle to be

function if the wire is shorted to ground or battery

tested from the diagnostic tool menu. If the

voltage. Also, if one of the modules on the ISO 9141

diagnostic tool does not communicate with the

communication network loses power or shorts

vehicle:

internally, communications to that module will fail.

1. Check that the program card is correctly

The following modules are linked to the ISO9141

installed.

communication network (for diagnostics only):

2. Check the connections to the vehicle.

Anti-lock Braking System and Traction Control

3. Check the ignition switch position is in RUN.

System (ABS/TCS) - Diagnostics only,

If the diagnostic tool still does not communicate with

operation via HS-CAN

the vehicle, go to Pinpoint Test M.

ABS/EVAC FILL module

4. Go to Pinpoint Test A.

Parking Aid Module (PAM) (if equipped)
Restraints Control Module (RCM)

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DIAGNOSIS AND TESTING (Continued)

Symptom Chart

Condition

Source

Action

ABS/TCS module does not respond to

Circuit or connection on ISO-9141

Go to PinPoint Test B .

the diagnostic tool (WDS)

communication network.
ABS/TCS module.
Power and ground circuits.

ABS/EVAC FILL module does not

Circuit or connection on ISO-9141

Go to PinPoint Test J .

respond to the diagnostic tool (WDS)

communication network.
ABS/EVAC FILL module.
Power and ground circuits .

RCM does not respond to the

Circuit or connection on ISO-9141

Go to PinPoint Test C.

diagnostic tool (WDS)

communication network.
RCM.
Power and ground circuits .

PAM does not respond to the

Circuit or connection on ISO-9141

Go to PinPoint Test D .

diagnostic tool (WDS)

communication network.
PAM.
Power and ground circuits.

IC does not respond to the diagnostic

Circuit or connection on CAN

Go to PinPoint Test E .

tool (WDS)

communication network.
IC.
Power and ground circuits.

PCM does not respond to the

Circuit or connection on CAN

Go to PinPoint Test F .

diagnostic tool (WDS)

communication network.
PCM.
Power and ground circuits .

ACM does not respond to the

Circuit or connection on CAN

Go to PinPoint Test G .

diagnostic tool (WDS)

communication network.
ACM.
Power and ground circuits.

BEM does not respond to the

Circuit or connection on CAN

Go to PinPoint Test H .

diagnostic tool (WDS)

communication network.
BEM.
Power and ground circuits.

HIM does not respond to the

Circuit or connection on CAN

Go to PinPoint Test I .

diagnostic tool (WDS)

communication network.
HIM.
Power and ground circuits.

No ISO 9141 network communication

Circuit or connection on the ISO 9141

Go to PinPoint Test K .

network.
ISO 9141 network modules.

No HS-CAN network communication

Circuit or connection on the HS-CAN

Go to PinPoint Test L .

network. HS-CAN network modules.

No module/network communication -

Data link connector (DLC).

Go to PinPoint Test M .

no power to the diagnostic tool

Central junction box (CJB) Fuse
(Courtesy Lamp).
Circuits.
Diagnostic tool.

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DIAGNOSIS AND TESTING (Continued)

Connector Circuit Reference

NOTE: Connector view is looking into the front of the

connector (wiring half).

Data Link Connector (DLC) - C174

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

70C

(SB-W)

—

ISO Communications

914K

( BR-Y)

—

HS-CAN Communications (High)

915K

( P-L)

—

HS-CAN Communications (Low)

In-line connector - C119

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

70

(SB-W)

—

ISO Communications

70A

(SB-W)

—

ISO Communications

914P

( BR-Y)

—

HS-CAN Communications (High)

915P

( P-L)

—

HS-CAN Communications (Low)

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