Ford Falcon. Manual — part 387

418-00-19

Module Communications Network

418-00-19

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

L9

CHECK CIRCUITS 914 (BR-Y) AND 915 (P-L) FOR SHORT TO

BATTERY AND SHORT TO GROUND WITH IC C171
DISCONNECTED

Key in OFF position.

Yes

Go to L16

Connect ICC C364.

No

Disconnect IC C171.

Check all circuits 914 (BR-Y) and 915 (P-L) for

Key in ON position.

short to battery and short to ground. REPAIR the
circuit(s) as necessary. REFER to

Enter the following diagnostic mode on the diagnostic tool:

Communication Circuit Wiring Repair in this

DATA LINK DIAGNOSTICS Test.

section. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Did the diagnostic tool indicate SYSTEM PASSED?

L10

CHECK FOR CORRECT PCM OPERATION

Key in OFF position.

Yes

INSTALL a new PCM module. Refer to Section

Disconnect all PCM connectors.

303-14. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all PCM connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

L11

CHECK FOR CORRECT ABS/TCS OPERATION

Key in OFF position.

Yes

INSTALL a new ABS/TCS module. Refer to

Disconnect all ABS/TCS connectors.

Section 206-09. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all ABS/TCS connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

L12

CHECK FOR CORRECT HIM OPERATION

Key in OFF position.

Yes

INSTALL a new HIM module. Refer to Section

Disconnect all HIM connectors.

412-04. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all HIM connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

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418-00-20

Module Communications Network

418-00-20

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

L13

CHECK CIRCUITS 914P (BR-Y) AND 915P (P-L) FOR SHORT

TO BATTERY AND SHORT TO GROUND WITH BEM C173 AND
IN-LINE C119 DISCONNECTED

Key in OFF position.

Yes

Connect In-line C119.

Disconnect In-line C119.

Go to L14

Check circuits 914P and 915P for short to battery and short to ground

No

between BEM C173 and In-line C119

REPAIR the circuit in question between BEM

Do the circuits 914P and 915P PASS?

C173 and In-line C119. REFER to
Communication Circuit Wiring Repair in this
section. Connect BEM C173 and In-line C119.
CARRY OUT the DATA LINK DIAGNOSTICS
test.

L14

CHECK FOR CORRECT BEM OPERATION

Key in OFF position.

Yes

INSTALL a new BEM module. Refer to Section

Disconnect all BEM connectors.

419-10. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all BEM connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

L15

CHECK FOR CORRECT ICC OPERATION

Key in OFF position.

Yes

INSTALL a new ACM module. Refer to Section

Disconnect all ICC connectors.

413-08. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all ICC connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

L16

CHECK FOR CORRECT IC OPERATION

Key in OFF position.

Yes

INSTALL a new IC module. Refer to Section

Disconnect all IC connectors.

413-01. CARRY OUT the DATA LINK
DIAGNOSTICS test.

Check for:

Corrosion

No

The system is operating correctly at this time.

Pushed-out pins

Concern may have been caused by a loose or

Connect all IC connectors and make sure they seat correctly.

corroded connector. CLEAR the DTCs. REPEAT
the self-test.

Operate the system and verify the concern is still present.

Is the concern still present?

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418-00-21

Module Communications Network

418-00-21

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST M : NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC

TOOL

Test Step

Result / Action to Take

M1

CHECK DIAGNOSTIC TOOL CONNECTOR

Inspect diagnostic tool pins for damage.

Yes

Go to M2

Are the pins OK?

No

REPAIR the diagnostic tool connector. TEST the
system for normal operation.

M2

CHECK DATA LINK CONNECTOR (DLC) C174 FOR DAMAGE

Key in OFF position.

Yes

Go to M3

Inspect DLC C174 pins for damage.

No

Are the pins OK?

REPAIR DLC C174. TEST the system for
normal operation.

M3

CHECK VOLTAGE CIRCUIT 956 (OG/LG) TO DIAGNOSTIC

TOOL

Measure the voltage between DLC C174 pin 16, circuit 956 (OG/LG),

Yes

and ground.

Go to M4

Is the voltage greater than 10 volts?

No

REPAIR the circuit. TEST the system for normal
operation.

M4

CHECK THE DLC GROUND CIRCUIT 57 (BK) AND CIRCUIT

570 (BK/WH)

Measure the resistance between DLC C174 pin 4, circuit 57 (BK);

Yes

C174 pin 5, circuit 570 BK/WH, and ground.

REPAIR the diagnostic tool. TEST the system
for normal operation.

Is the resistance less than 5 ohms?

No

REPAIR the circuit(s) in question. TEST the
system for normal operation.

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418-00-22

Module Communications Network

418-00-22

GENERAL PROCEDURES

Communication Circuit Wiring Repair

4. Bend the wires back in a straight line.

NOTE: Wait for the solder to cool before moving

Special Tool(s)

the wires.

Heat Gun

107-R0300 or equivalent

1. Disconnect the battery ground cable. Refer to

Section 414-01.

2. Strip the wires.

5. Position the (A) heat shrink tube over the (B) wire

repair.

Overlap the heat shrink tube on both wires.

3. Solder

the

wires.

1. Install the heat shrink tube.

2. Twist the wires together.

3. Solder the wires together.

NOTE: Use rosin core mildly activated (RMA)

solder, not acid core solder.

6. Use the heat gun to heat the repaired area until

adhesive flows out both ends of the heat shrink

tube.

7. Reconnect the battery ground cable.

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