TM-9-2320-272-23-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-2 - Page 144 of 1417

ABS - CODE S2A 24 (RIGHT SIDE - YELLOW CHANNEL) - Continued

CONDITION/INDICATION

IS THE WHEEL SPEED SENSOR SECURELY MOUNTED?

DECISION

YES - Go to Step (5) to verify problem is solved.

NO - Repair or replace wheel speed sensor (Volume 3, WP

0468). Go to Step (5) to verify problem is solved.

STEP

5.

IS YOUR ORIGINAL PROBLEM STILL PRESENT?

a.

If removed, install right rear-rear hub and drum assembly M939/A1 (Volume 3, WP

0480), M939A2

(Volume 3, WP

0482).

b.

If raised, remove jack stands and lower wheel.

c.

Ensure vehicle is returned to normal operating condition.

d.

Perform Clear Historical Codes Procedure (WP

0159).

NOTE

Fault code S2A 23 will only occur when vehicle speed is greater than 6 MPH.

e.

Start vehicle.

f.

Operate vehicle to a speed of 20 miles per hour.

g.

Return vehicle to park position.

h.

Perform ABS - Start- Retrieving Fault Codes With Haldex Info Center (Scan Tool) (WP

0161).

i.

Check to see if your original fault code still exists.

CONDITION/INDICATION

IS YOUR ORIGINAL PROBLEM STILL PRESENT?

DECISION

YES - Notify supervisor.

NO - Problem fixed.

END OF WORK PACKAGE

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