DIAGNOSTICS - CONTINUED - TM-9-2320-303-24-10145

TM 9-2320-303-24-1

ANTI-LOCK BRAKE SYSTEM TROUBLESHOOTING AND TESTING - CONTINUED

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DIAGNOSTICS - CONTINUED

If you do not receive eight flashes, there are still active faults that must be repaired before they can be cleared.

Blink Code Diagnostic Procedures:

For the step-by-step blink code diagnostic procedure, see Table 3.

Table 3. Blink Code Diagnostic Procedure.

MODE

PROCEDURE

SYSTEM RESPONSE

ACTION

Diagnostic

Step 1.

The ABS warning lamp comes on No recognizable faults in the ABS.

Turn the ignition on.

momentarily then goes out, No action required.

indicating System Okay.

The ABS warning lamp does not Inspect the wiring. Inspect the

light, indicating possible wiring bulb. Make necessary repairs.

fault or burned out bulb.

The ABS warning lamp stays on, Continue with the blink code

indicating there is a fault, or faults, diagnostics. Go to the next step.

in the system.

Step 2. Press and hold the The ABS warning lamp begins Determine if the fault is active or

Blink Code Switch for one flashing two-digit blink codes(s). stored:

Active Fault: The lamp will

second, then release.

repeatedly display one code.

Stored Fault: The lamp will

display the code for each stored

fault then stop blinking. Faults will

be displayed one at a time.

Step 3. Count the flashes to First Digit: 1 to 8 flashes, Pause Turn the ignition off. Find the

(11/2 seconds). Second Digit: 1 to definition for the blink code on the

determine the blink code.

blink code chart.

6 flashes, Pause (4 seconds).

Step 4. Repair and record the Active Fault.

Make the necessary repairs. Repeat

faults.

the first three steps of this

procedure until System Okay Code

(1-1) received.

Stored Faults.

Record for future reference.

NOTE: The last fault code stored is

the first fault code displayed.

Clear

Step 5. Clear faults from the The ABS warning lamp flashes All faults are successfully cleared.

memory: Press and hold the eight times.

Turn the ignition off.

blink code switch for at least

three seconds, then release.

Eight flashes are not received.

Active faults still exist, repeat the

first four steps of this procedure.

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