TM 9--2350--292--20--1
M3 HEATER (1, 2, OR 3) FAILS TO OPERATE. AIR PURIFIERS OPERATE
PROPERLY
0080 00
THIS WORK PACKAGE COVERS:
M3 Heater (1, 2, Or 3) Fails To Operate. Air Purifiers Operate Properly
INITIAL SETUP:
Tools and Special Tools
General mechanic’s tool kit (item 1, WP 0717 00)
Multimeter (item 84, WP 0717 00)
Equipment Conditions
Vehicle MASTER switch OFF (TM 9--2350--292--10)
Personnel Required
Two
WARNING
Remove rings, bracelets, wristwatches,
and neck chains before working on any
vehicle. Jewelry can catch on equip-
ment and cause injury, or may short
across an electrical circuit and cause
severe burns or electrical shock.
no
yes
Repair (WP 0290 00) or replace
harness 4W306 (heater 1 or 2)
(WP 0710 00) or 4W307 (heater
3) (WP 0711 00). Verify fault is
corrected.
A
1. Disconnect harness 4W306 P3 (heater 1),
4W306 P4 (heater 2) or 4W307 P3 (heater 3)
from faulty M3 heater.
2. Turn MASTER switch ON
(TM 9--2350--292--10).
3. Place red multimeter lead on harness 4W306
P3 (heater 1), 4W306 P4 (heater 2) or 4W307
P3 (heater 3) connector pin and black lead to
ground. Check for voltage.
4. Turn MASTER switch OFF
(TM 9--2350--292--10).
Is 24 V dc present?
no
yes
Clean and/or repair (WP
0290 00) ground lead as
necessary. If fault is not
corrected, replace M3
heater (WP 0708 00).
Verify fault is corrected.
B
1. Make sure ground lead is securely fastened to
mounting bracket.
2. Place one multimeter lead on heater ground
lead and other lead to vehicle ground. Check
for continuity.
Is continuity present?
Replace M3 heater (WP
0708 00). Verify fault is
corrected.
FORWARD
END OF TASK
0080 00--1/2 blank
