0016
TM 1-1740-221-13&P&P
CREW PROTECTION SYSTEM (CPS) ACCESSORIES TROUBLESHOOTING - (CONTINUED)
BRANCH 2.
2.
CONDITION/INDICATION
Leaks or blockage?
DECISION
NO Proceed to Step 3.
BRANCH 3.
3.
Place ignition switch to "Run" position, turn heat control knob to full heat (clockwise), and check for power
at heater control valve.
CONDITION/INDICATION
Is there 12 volts power at heater control valve?
DECISION
YES Replace heater control valve (WP 0105).
NO Proceed to Step 4.
BRANCH 4.
4.
Check wiring from switch to heater control valve for condition and continuity.
CONDITION/INDICATION
Wiring serviceable and continuity check good?
DECISION
YES Replace heater control valve (WP 0105).
NO Repair/replace defective wiring or connectors (WP 0112).
END OF WORK PACKAGE
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