KENR6933 157
Troubleshooting Section
E. Check the harness for abrasions and for pinch
points from the
battery to the ECM.
Results:
•
OK – Proceed to Test Step 2.
•
Not OK
Repair: Repair the connectors or the harness or
replace the co
nnectors or the harness. Ensure that
all of the seals are correctly installed and ensure
that the connectors are completely coupled.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair elimi
nates the fault.
STOP.
Test Step 2. Inspect the Lamp, the Fuse,
and the Power Supply
A. Disconnect
the lamp from the harness. Inspect the
lamp in order to determine if the lamp has failed.
B. Measure the
resistance across the two terminals
of the lamp. If the resistance is more than 2000
Ohms, the bulb has failed.
C. Check the battery by connecting a test lamp
across the terminal of the battery.
Expected Result:
Thelampha
s less than 2000 Ohms and the power
supply is OK.
Results:
•
OK – The lamp appears to be operating correctly
at this tim
e.ProceedtoTestStep3.
•
Not OK
Repair: Replace the suspect component or repair
the suspect component.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repairs h
ave eliminated the fault.
STOP.
Test Step 3. Measure the Input to the
Lamp at the Lamp Socket
A. Turn the k
eyswitch to the ON position.
B. Use the electronic service tool to select the
“Overrid
e” function in order to switch individual
lamps ON and OFF.
Note: The “Override” function is contained in the
“Diagnostics”
menu of the electronic service tool.
C. Measure the voltage at the lamp socket.
Expected Result:
The voltage sh
ould be between 12.0 Volts DC and
24.0 Volts DC.
Results:
•
OK – The voltage is between 12.0 Volts DC and
24.0 Volts DC.
Repair: Replace the bulb.
Verify that the repair eliminates the fault.
If the fault pe
rsists, measure the resistance across
the 2 terminals of the lamp. If the resistance is
more than 2000 Ohms, the replacement bulb has
failed. Repl
ace the bulb and repeat the test.
If the fault persists, proceed to Test Step 4.
•
Not OK – The voltage is not in the range that is
expected. Proceed to Test Step 5.
Test Step 4. Test the Individual Lamp
Circuits
A. Disconnect
the P1 connector.
B. Temporarily disconnect the wire from the P1
connector s
ocket that supplies the suspect lamp.
C. By using a jumper wire, connect the removed wire
to the batte
ry-.
D. Turn the keyswitch to the ON position and observe
the lamp.
Expected Result:
The diagnostic lamp turns ON while the jumper is
connected. Also, the diagnostic lamp turns OFF
when the ju
mper is removed.
Results:
•
OK – The circuit for the diagnostic lamp is
functioning correctly. Proceed to Test Step 5.
•
Not OK – The lamp did not turn ON. The lamp
circuit is not functioning correctly. There is a fault in
the harnes
s between the lamp and the ECM.
Repair: Repair the lamp circuit.
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