KENR6933 109
Troubleshooting Section
Expected Result:
One of the following diagnostic codes is active:
•
0262-03 5 Volt S
ensor DC Power Supply voltage
above normal
•
0262-04 5 Volt
Sensor DC Power Supply voltage
below normal
Results:
•
OK – Diagnostic code 0262-04 is active. Proceed
to Test Step 3.
•
OK – Diagnostic code 0262-03 is active. Proceed
to Test Step 6.
•
Not OK – Diagnostic codes 0262-04 and 0262-03
are not active
. Proceed to Test Step 4.
Test Step 3. Disconnect the Sensors
A. Turn the keyswitch to the ON position.
B. Use the elect
ronic service tool in order to monitor
the diagnostic codes.
C. Disconnect t
he pressure sensors one at a time. If
the analog throttle demand sensors are installed,
then disconnect the throttle sensors one at a time.
Wait for 30 se
conds after each of the sensors is
disconnected.
Note: Diagn
ostic code 0262-04 will become inactive
when the sensor that caused the 5 Volt diagnostic
code is disconnected.
D. Ensure that all the pressure sensors and the
throttle demand sensors (if equipped) are
disconnec
ted.
Expected Result:
The 5 Volt diagnostic code is not active when all of
the sensors are disconnected.
Results:
•
OK –The5Vo
lt diagnostic code is not active when
all of the sensors are disconnected.
Repair: Re
connect all of the sensors except the
suspect sensor.
Proceed to
Test Step 4.
•
Not OK – Diagnostic code 0262-04 is still active.
Repair: Leave all of the sensors disconnected.
Proceed to
Test Step 5.
Test Step 4. Install a New Sensor
A. Remove the connector from the suspect sensor
and connect the connector to a replacement
sensor. Do not
install the replacement sensor to
the engine.
B. Use the electr
onic service tool in order to monitor
the diagnostic codes.
Expected Resu
lt:
Diagnostic codes 0262-03 and 0262-04 are not
active.
Results:
•
OK – The 5 Volt diagnostic code is not active.
Repair: Use th
e electronic service tool in order
to clear all logged diagnostic codes. Remove the
suspect sensor and then install the replacement
sensor . Conn
ect the connector to the sensor.
Verify that the repair eliminates the fault.
STOP.
•
Not OK – The 5 V
olt diagnostic code is still active.
Repair: Do not use the new sensor.
ProceedtoTestStep5.
Test Step 5. D
isconn ect the EC M
Connector a
nd Check for Active
Diagnostic Codes
A. Turn the key
switch to the OFF position.
B. Connect the electronic service tool to the
diagnostic
connector.
C. Check the ECM connectors for corrosion and
moisture.
D. Disconnect the P2 ECM connector from the ECM.
E. If a P1:41 is installed, then temporarily disconnect
the pin. If a P1:42 is installed, then temporarily
disconnec
t the pin.
F. Reconnect the P1 connector to the ECM.
G. Turn the keyswitch to the ON position.
H. Check for a
ctive diagnostic codes on the electronic
service tool.
Note: A“vo
ltage high” diagnostic code (open circuit)
should be active for all of the following sensors:
•
Engine pre
ssure sensors
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