0012
TM 1-1740-221-13&P&P
PARK POSITION BRAKE TROUBLESHOOTING - (CONTINUED)
BRANCH 3.
3.
Perform this step (two person operation) in order to simplify troubleshooting. Hand break disengaged or off,
engine start switch in the run position (engine not running), Move gear selector to the drive position and
observe the park position motor operates to disengage the park position brake.
CONDITION/INDICATION
Did the park position motor operate disengaging the park position brake caliper?
DECISION
YES Proceed to Step 4.
NO Proceed to Step 5.
BRANCH 4.
4.
Inspect park position caliper assembly (WP 0087).
CONDITION/INDICATION
Is the park position caliper damaged?
DECISION
YES Proceed to Step 5.
NO Replace defective component(s) (WP 0087).
BRANCH 5.
5.
CONDITION/INDICATION
Did the lower park position limit switch LS-PR ohms check ok?
DECISION
YES Proceed to Step 6.
NO Replace lower limit switch LS-PR (WP 0086).
BRANCH 6.
6.
CONDITION/INDICATION
Does park brake release relay (CRR) ohms check properly?
DECISION
YES Proceed to Step 7.
NO Replace defective park brake release relay CRR (WP 0121).
BRANCH 7.
7.
Ohms test the park position motor winding at wiring connector J7 (WP 0085) for continuity (FO-1, Line 31).
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