Section 4
TROUBLESHOOTING
E. CODE 43- LOW COOLANT (Cent’d.)
TM 9-2320-363-20-1 “
STEP/SEQUENCE
43.7 CLS Probe Check
l Ignition off.
l Unscrew CLS probe.
l Place CLS in a cup of water. Have
threads and probe in water.
l Turn ignition on.
. Clear-codes.
. Starl engine. Run until "Check
Engine” light comes on or for 1
minute.
l If "Check Engine” light is not on.
l Remove probe from water.
l After 30 seconds, stop engine.
43.8 Check for Open
l Turn ignition off.
. Disconnect CLS module connector.
l Measure resistance between pins
A and Bon the vehicle harness
side while probe is in coolant.
43.9 Check Probe Loads for
Open
l Check the connection on the CLS
probe and the terminals in the
CLS connector.
43.10 Check for Open
l Measure resistance between pin
A and the center screw on the
probe.
l Repeat above for pin B and the
screw on the side of the probe.
43.30 Verify Repairs
l Turn ignition off.
l Reconnect all connectors.
l Turn ignition on.
. Clear codes.
l Start and run engine until the “Stop
Engine’” light comes on or for 1
minute.
l Stop engine.
l Read historical codes.
RESULT
WHAT TO DO NEXT
"Check Engine”
-60 to 43-8.
light always on.
“Check Engine”
- Replace CLS probe
light never on.
Then go to 43-30.
No “Check Engine” light--Go to 43-6.
while in water and “Check
Engine” light is ON while
out of water.
page 4-242.
Less than
Go to 43-30.
2M ohms.
Equal to or
Go to 43-9.
greater than 2M ohms.
Everything appears
to be okay.
Problem found.
- Repair problem, page 3-2.
Then go to 43-30.
Either reading
- Open wire. Contact Direct
is greater than 5 ohms.
Support.
Both readings
-- Replace CLS probe, page 4-242.
are less than 5 ohms.
Then go to 43-30.
Code 25 (no codes).
- Repairs are complete.
Code 43 (and
- All system diagnostics are
any other code).
complete. Please review this
section from the start to find
the error.
Any other codes
-- Go to START-1, page 3-121,
except Code 43.
to service other codes.
3-295
