Ford Falcon. Manual - part 81

206-09-13 

Anti Lock Control 

206-09-13

DESCRIPTION AND OPERATION (Continued)

TCS in operation

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206-09-14 

Anti Lock Control 

206-09-14

DIAGNOSIS AND TESTING

It is important that all of the steps in the Procedure

Anti Lock Control

are followed to avoid the unnecessary replacement of

parts that are not faulty and to ensure that the

Principles of Operation

ABS/TCS system is returned to its designed operating

The ABS/TCS system has a self-test capability and

condition.

will memorise faults for 125 key starts. Fault codes

Procedure

are accessed using the WDS tester. Self-test codes

are held in the EPROM and can only be cleared using 1.  Complete an ABS/TCS Concern Customer

the WDS tester. Up to 3 “on demand” or “stored”

Questionnaire. Determine whether or not the

codes can be logged by the ECU. It is essential that

issues raised indicate a fault with the ABS/TCS

the system is retested after any fault is rectified until

system or are in fact normal operating

no further on-demand codes are displayed.

characteristics of ABS/TCS systems in general.

The self test connector is located behind the fuse box 2.  If a fault is indicated, proceed to the ABS/TCS

panel cover (underneath the instrument panel on the

Diagnostic Procedure table.

right of the steering column). Follow the operating

3.  Follow the table. If any hard or memory DTCs are

procedures provided with the test equipment.

displayed, refer to the DTC Table for a definition

WDS Tester

and reference to the appropriate pin point test

flow chart for each DTC.

The WDS tester is used to communicate serially with

4.  When the table directs you to return to the ABS

the ABS module for diagnostics. The WDS must be

Diagnostic Procedure table, return to the

used to carry out the following functions/tests on the

“RETURN FROM PIN POINT TEST” box and

ABS system:

proceed to confirm the repair.

Diagnostic Test Modes

NOTE: Ensure that all memory DTCs are cleared

Trouble code clearing

PRIOR to confirming the repair. If hard DTCs still

PIDs/Data monitoring

exist then the related faults also still exist.

Function test — to operate ABS modulator

5.  Confirm the repair by following the ABS/TCS

components

Diagnostic Procedure table. If at any time the ABS

NOTE: When operating the ABS pump using the

or traction control warning lamp flashes or

WDS tester, the pump should not be allowed to run

illuminates (other than the normal 3-second

for more than 5 seconds. After confirming pump

period after the ignition is switched on) then there

operation, switch off the pump motor by pressing the

is a fault within the ABS/TCS system.

WDS button.

6.  In the event that the same DTC appears, continue

to follow the flow chart back to the same pin point

Inspection and Verification

test flow chart. Conduct the same checks and if

no fault is found the flow chart will direct you to

If a vehicle is presented with an ABS/TCS concern,

replace the ABS Modulator Assembly.

indicated either by way of the ABS or traction control

NOTE: The ABS/TCS Modulator Assembly is a

warning lamp or by the Owner/Driver reporting an

critical safety item. It should only be installed by

unexpected operating characteristic (eg noise,

trained and experienced ABS Technicians. After

vibration, wheel lock-up, spinning wheels, etc.) follow

replacing the ABS/TCS Modulator Assembly, it

the Diagnosis Procedure to:

will still be necessary to confirm the repair by

determine whether or not there is a fault with the

returning to the ABS/TCS Diagnostic Procedure

ABS/TCS system

table.

locate and isolate the fault

7.  At the conclusion of the road test if there are no

rectify the fault

DTCs then the system can be considered to be

confirm the repair with an ABS/TCS road test.

working correctly and is ready for return to the

Owner/Driver.

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206-09-15 

Anti Lock Control 

206-09-15

DIAGNOSIS AND TESTING (Continued)

ABS/TCS CONCERN CUSTOMER QUESTIONNAIRE

Customer’s Name________________________

R/O Number________________________

Registration Number______________________

Date______________________________

Odometer Reading_______________________
PROBLEM DESCRIPTION
1. Do the ABS and traction control warning lamps come on when you start the car?

Yes       No

2. Do the ABS or traction control Lamps turn off after 3 seconds or do they stay on or flash?

Turns Off     Stays On      Flashes

3. Do the ABS or traction control lamps flash or stay on whilst driving?  No     Stays On      Flashes
4. If not the warning lamp, what caused you to suspect a fault with the ABS or TCS system?
Was it Noise? Please describe the noise, and whether it occurred during braking, during an ABS stop,

during heavy acceleration or at some other time.
_______________________________________________________________________________________
_______________________________________________________________________________________
or was it Vibration/Harshness? Please describe the vibration/harshness, and whether it occurred during

braking, during an ABS stop or at some other time.
_______________________________________________________________________________________
_______________________________________________________________________________________
or was it the feel/travel of the brake pedal? Please describe how the brake pedal behaved, and whether it

occurred during braking, during an ABS stop or at some other time.
_______________________________________________________________________________________
_______________________________________________________________________________________
Other_______________________________________________________________________
_______________________________________________________________________________________
5. How often does it happen?

Frequently         Infrequently        Once

6. Does it usually happen only under specific circumstances? (eg. only when the vehicle is cold, only in

the wet, only on rough or slippery surface roads, etc)
_______________________________________________________________________________________
_______________________________________________________________________________________
VEHICLE HISTORY
1. Have you had any repairs made to your vehicle recently? Describe.
_______________________________________________________________________________________
2. Have you had new tyres fitted or have you had a flat tyre recently?

Yes        No

3. Have you had a flat battery recently?

Yes          No

4. Have you had the ABS system checked or repaired previously? If so, when and why?
_______________________________________________________________________________________

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206-09-16 

Anti Lock Control 

206-09-16

DIAGNOSIS AND TESTING (Continued)

ABS/TCS DIAGNOSTIC PROCEDURE

DIAGNOSTIC PROCEDURE - PART A

1. Refer to the completed ABS/TCS Concern Customer

Questionnaire for information relating to when, where and how

frequently the concern is noticed.
NOTE: I. The ABS and TCS lamps only indicate the presence of

hard faults. They will not illuminate if only a memory fault is

present.
II. The ECU can store no more than 3 DTC’s. The oldest DTC will

be erased if more than 3 are present.
III. If the ABS/TCS ECU wiring loom connector is not connected

properly, the ABS & TCS lamps will remain on while the ignition

is on.
IV. If a hard fault is present, the ABS and TCS lamps will remain

lit until the fault is corrected.

2. Turn the ignition OFF

3. Connect the WDS and turn the ignition ON

Does the WDS communicate with the ABS/TCS system?

Yes

Refer below

No

Refer to COMMUNICATIONS

FAULT, Pinpoint Test F.

Are there any DTC’s?

Yes

Record DTC and refer to DTC

table in this section for

diagnosis and repair

procedure.

No

Go to 4. Below

4. Turn the ignition OFF then disconnect the WDS

5. Confirm correct operation of the system.

6. Go to DIAGNOSTIC PROCEDURE - PART B.

DIAGNOSTIC PROCEDURE - PART B

1. Turn the ignition ON

Do the ABS & TCS come on and then go out after 3 seconds? Yes

Go to 2. Below

No

One or both lamps do not

come on or they stay on after 3

seconds

Check bulb and wiring for open

circuits and shorts to ground.

Be sure to wiggle the wiring

whilst testing. Repair as

required.

Go to DIAGNOSTIC

PROCEDURE - PART A, Item

2.

2. Ensure that the vehicle is safe to drive.

3. Drive the vehicle above 30 km/h for at least 80 seconds.

4. Select a safe, clear section of road and perform an ABS stop.

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