Troubleshooting

Table 113
Troubleshooting Test Steps
Values Results
1. Check the Type of Switch that is Installed and
Configured
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position. Do not start the
engine.
C. Use the electronic service tool to check that the “Air Filter
Restriction Switch Installation Status” and the “Air Filter Re-
striction Switch Configuration” matches the type of switch that
is installed.
Switch
configuration
Result: An air filter restriction switch is installed and the “Air
Filter Restriction Switch Installation Status” is “Not Installed” .
Use the electronic service tool to change the “Air Filter Restric-
tion Switch Installation Status” to “Installed” . Ensure that the
“Air Filter Restriction Switch Configuration” matches the type
of switch that is installed.
Use the electronic service to check that the repair eliminates
the fault.
Result: An air filter restriction switch is not installed and the
“Air Filter Restriction Switch Installation Status” is “Not In-
stalled” . The “Air Filter Restriction Switch Configuration” is
“Normally Closed” .
Repair: Change the “Air Filter Restriction Switch Configura-
tion” to “Normally Open.”
Use the electronic service to check that the repair eliminates
the fault.
Result: An air filter is installed and the “Air Filter Restriction
Switch Installation Status” is installed. The “Air Filter Restric-
tion Switch Configuration” does not match the type of switch
that is installed.
Repair: Change the “Air Filter Restriction Switch Configura-
tion” to match the type of switch that is installed.
Use the electronic service to check that the repair eliminates
the fault.
Result: An air filter restriction switch is installed. The “Air Filter
Restriction Switch Installation Status” is “Installed” . The “Air
Filter Restriction Switch Configuration” matches the type of
switch that is installed.
Proceed to Test Step 2.
2. Inspect Electrical Connectors and Wiring
A. Thoroughly inspect the terminal connections on the P1/J1
connector.
B. Thoroughly inspect the connector for the air filter restriction
switch.
C. Refer to Troubleshooting, “Electrical Connectors -
Inspect”.
D. Perform a 30 N (6.7 lb) pull test on each of the wires in the
connectors that are associated with the air filter restriction
switch.
E. Check the harness for abrasions and for pinch points from
the switch back to the ECM.
Damaged wire
or connector
Result: A damaged wire or damaged connector was found.
Repair: Repair the damaged wire or the damaged connector.
Use the electronic service tool to clear all logged diagnostic co-
des. Verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly con-
nected and/or inserted and the harness is free of corrosion, of
abrasion or of pinch points.
Proceed to Test Step 3.
(continued)
UENR0612-07 243
Circuit Tests
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