Troubleshooting

(Table 113, contd)
Troubleshooting Test Steps
Values Results
6. Create a Short at the Switch Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector from the air filter restriction
switch.
C. Fabricate a jumper wire and install the jumper wire across
the two terminals on the harness connector for the switch.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for an active 107-2
diagnostic code. Wait at least 10 seconds for activation of the
diagnostic code.
F. Turn the keyswitch to the OFF position.
G. Remove the jumper wire.
Diagnostic code Result: The fault is cleared with the jumper installed.
Repair: Replace the air filter restriction switch.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: A 107-2 diagnostic code is still active with the jumper
installed.
Proceed to Test Step 7.
7. Check the Ground Wire for the Switch
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector from the air filter restriction
switch.
C. Fabricate a jumper wire. Install the jumper wire between
the signal terminal on the harness connector for the switch
and a suitable ground.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for an active 107-2
diagnostic code. Wait at least 10 seconds for activation of the
diagnostic code.
F. Turn the keyswitch to the OFF position.
G. Remove the jumper wire.
Diagnostic code Result: The fault is cleared with the jumper installed.
The fault is in the ground wire between the air filter restriction
switch and battery negative.
Repair: Check all wiring between the switch and the ECM. Re-
fer to the Electrical Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: A 107-2 diagnostic code is active with the jumper
installed.
Proceed to Test Step 8.
8. Check the Wiring for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the switch. Disconnect the
P1 connector from the ECM.
C. Use a suitable multimeter to measure the resistance be-
tween P1:87 and the signal terminal on the harness connec-
tor for the switch.
Less than 5
Ohms
Result: The measured resistance is greater than 5 Ohms.
There is an open circuit or high resistance in the wiring be-
tween the air filter restriction switch and the ECM.
Repair:Check all wiring between the switch and the ECM. Re-
fer to the Electrical Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: The measured resistance is less than 5 Ohms.
Contact the Dealer Solution Network (DSN).
UENR0612-07 245
Circuit Tests
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