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 132 of 1417

ABS - CODE S2B 14 (RIGHT SIDE - YELLOW CHANNEL) - Continued

f.

Connect multimeter red lead to wheel speed sensor connector terminal. Refer to point to point

schematics.

g.

Connect multimeter black lead to wheel speed sensor connector other terminal.

h.

Measure AC voltage while rotating wheel at a rate of one revolution every two seconds.

i.

Meter reading should be at least 200 millivolts (.002 volts).

j.

If meter reading is correct, connect wheel speed sensor connector.

k.

Remove jack stand and lower wheel.

l.

Uncage brake.

CONDITION/INDICATION

IS RIGHT WHEEL SPEED SENSOR OUTPUT VOLTAGE OK?

DECISION

NO - Replace wheel speed sensor (Volume 3, WP

0468). Go to Step (2) to verify problem is solved.

YES - Go to Step (2) to verify problem is solved.

STEP

2.

IS YOUR ORIGINAL PROBLEM STILL PRESENT?

a.

Ensure vehicle is returned to normal operating condition.

b.

Perform Clear Historical Codes Procedure (WP

0159).

NOTE

Fault code S2A 13 will only occur when vehicle speed is greater than 6 MPH.

c.

Start vehicle.

d.

Operate vehicle to a speed of 20 miles per hour.

e.

Return vehicle to park position.

f.

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

0161).

g.

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

TM 9-2320-272-23-2

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