KENR9126 211
Troubleshooting Section
Expected Result:
No diagnostic codes are active.
Results:
•
OK – No diagnostic codes are active.
Repair: The problem may have been related
to a faulty connection in the harness. Carefully
reinspect t
he connectors and wiring. Refer to
the diagnostic functional test Troubleshooting,
“Electrical Connectors - Inspect”.
STOP.
•
Not OK – An 0
4 diagnostic code is active. Proceed
to Test Step 3.
•
Not OK – An 0
3 diagnostic code is active. Proceed
to Test Step 5.
Test Step
3. Check the Supply Voltage at
the Harn
ess Connector for the Sensor
A. Remove the electrical power from the ECM.
B. Disconnect the harness connector for the sensor.
C. Restor
e the electrical power to the ECM.
D. Measure the voltage between terminals 1 (Signal)
and2(s
ensor return) at the harness connector
for the sensor.
E. Remov
e the electrical power from the ECM.
F. Connect the sensor's harness connectors.
Expected Result:
The v
oltage is 5.0 ± 0.2 VDC.
Results:
•
OK – The voltage is 5.0 ± 0.2 VDC. The voltage is
correct. Proceed to Test Step 4.
•
Not OK – The voltage is not 5.0 ± 0.2 VDC. The
voltage is incorrect.
Repair: Perform the diagnostic functional test
Troubleshooting, “Analog Sensor Supply Circuit -
Te
st”.
STOP.
Test Step 4. Disconnect the Sensor in
Order to Create an Open Circuit
A
.
R
emove the electrical power from the ECM.
B. Disconnect the harness connector for the sensor.
C. Restore the electrical power to the ECM. Wait at
least 30 second
s for activation of the diagnostic
codes.
D. Access the “Ac
tive Diagnostic Codes” screen on
the electronic service tool and check for an active
03 diagnostic code for the sensor.
E. Remove the electrical power from the ECM.
Expected Re
sult:
An 03 diagnostic code is now active for the sensor.
Results:
•
OK –An04di
agnostic code was active before
disconnecting the sensor. An 03 diagnostic code
became active after the sensor was disconnected.
Repair: Temporarily connect a new sensor to
the harness, but do not install the new sensor in
the trans
mission. Verify that there are no active
diagnostic codes for the sensor. If there are no
active diagnostic codes for the sensor, permanently
install t
he new sensor. Clear any logged diagnostic
codes.
Verify t
hat the repair eliminates the problem.
STOP.
•
Not OK – The 04 diagnostic code is still present.
Leave the sensor disconnected. Proceed to Test
Step 6.
Test Step 5. Create a Short at the Harness
Connector
A. Remove the electrical power from th e ECM.
B. Inst
all a jumper wire between terminals 1 and 2 on
the harness connector for the sensor.
C. Rest
ore the electrical power to the ECM.
D. Wait at least 30 seconds for activation of the 04
dia
gnostic code.
Note: Monitor the “Active Diagnostic Codes” screen
on t
he electronic service tool before installing the
jumper wire and after installing the jumper wire.
E. Re
move the jumper wire. Check for an 04
diagnostic code again.
F. Re
move the electrical power from the ECM.
Expected Result:
An 04 diagnostic code is active when the jumper wire
is installed. An 03 diagnostic code is active when the
j
umper wire is removed.
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