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 226 of 1417
ABS - CODE YEDU 89 (RIGHT SIDE - YELLOW CHANNEL) - Continued
CONDITION/INDICATION
DOES A SHORT CIRCUIT TO BATTERY POSITIVE EXIST IN THE DUMP CIRCUIT?
DECISION
YES - Replace ABS wiring harness (Volume 3, WP
0467). Go to Step (3) to verify problem is solved.
NO - Replace ABS ECU (Volume 3, WP
0452). Go to Step (3) to verify problem is solved.
STEP
3.
IS YOUR ORIGINAL PROBLEM STILL PRESENT?
a.
Connect dump solenoid cable connector at front relay valve.
b.
If disconnected, connect main harness 28-pin connector at ECU. Listen for locks to "click" in place to
ensure a sound connection.
c.
Ensure vehicle is returned to normal operating condition.
d.
Perform Clear Historical Codes Procedure (WP
0159).
e.
Start vehicle.
f.
Operate vehicle to a speed of 20 miles per hour. Applying brakes several times.
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
TM 9-2320-272-23-2
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