TM 5-2420-231-23-1
0021
Table 1. Engine Coolant Temperature Gauge Indicates High Temperature,
Does Not Function, or Is Inaccurate.
0021
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine Coolant
Test Step 1. Inspect Coolant Level
Temperature Gauge
and Verify Coolant Temperature
Indicates High Temperature,
Gauge Operation.
Does Not Function, or Is
1. Inspect coolant reservoir (Figure 1, Coolant Level OK - Proceed to step 2.
Inaccurate
Item 2) for coolant. Coolant should Coolant Level Low - Proceed to Test
be visible and between the full
Step 2.
COLD mark (Figure 1, Item 3) and
MAX HOT mark (Figure 1, Item 1).
Figure 1. Coolant Reservoir.
0021
2. Turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
3. Verify that the coolant temperature
Coolant Temperature Gauge Below
gauge is between the lowest and
Lowest Mark at All Times - Proceed to
highest marks (TM 5-2420-231-
step 4.
10).
Coolant Temperature Gauge Above
Highest Mark at All Times - Proceed
to Test Step 8.
Coolant Temperature Gauge
Between Lowest and Highest Marks
- Proceed to step 4.
