Go to 16-5.
Section
4
TROUBLESHOOTING
E. CODE
16-
COOLANT
LEVEL
SENSOR
(CLS)
SIGNAL
NOTE-
Thischartisonlyto be usedif:
TM 9-2320-363-20-1
CHARTS
VOLTAGE
HIGH
1) All basic mechanical checks
and
physical
inspections
have
been
performed
with
no
problem
found.
and
2) Diagnosis of DDEC-II was started at step Start- 1 (page 3-121 ) and you have now been referred here.
16-1
Sensor
Check
l Turn ignition
off.
l Disconnect CLS module and install
a jumper between sockets D and
C of the CLS harness connector.
l Attempt to start and run engine at
idle.
l Read active codes.
l Stop engine.
16-2
Signal
and Ground
Circuit
Check
l Turn ignition off.
l Disconnect the vehicle harness
connector.
l Read resistance between socket
H3 on the vehicle harness
connector and a good ground.
16-3
Check
CLS ignition
l Remove jumper wire.
l Turn ignition on.
l Read voltage at the CLS connector,
socket E (red lead) to socket C
(black lead).
16-4
Check
CLS
Connectors
l inspect terminals at the CLS
connectors (both the sensor and
harness side) for damage;
bent,
corroded, and unseated pins or
sockets.
RESULT
WHAT TO DO NEXT
Code 16 (and
‘o
to 16-2.
any other codes
except Code 13).
Code 13 (and
GO to 16-3.
any other codes).
Less than or
Go to 16-7.
equal to 5 ohms.
Greater than
Either the CLS signal line (ckt
5 ohms or open.
#115) or the battery ground line
is open. Contact Direct Support.
Less than
Between 4 and 6 volts, 12 volt
or equal to 10.0 volts.
line is wired to 5 volt supply.
Else, the switched
12 volt line is
open. Contact Direct Support.
Greater than
Go to 16-4.
10 volts.
Terminals and
Replace CLS module, page 4-
connectors
are okay.
240. Then go to 16-30.
Problem found.
Repair terminals/connectors,
page 3-2. Then go to 16-30.
3-217
