(Table 111, contd)
Troubleshooting Test Steps Values Results
3. Create an Open Circuit at the Switch Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector from the air filter restriction
switch.
C. Turn the keyswitch to the ON position. Do not start the
engine.
D. 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.
E. Turn the keyswitch to the OFF position.
Diagnostic
codes
Result: The fault is cleared with the switch disconnected.
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: The 107-2 diagnostic code is still active with the air fil-
ter restriction switch disconnected.
Reconnect the connector to the air filter restriction switch and
proceed to Test Step 4.
4. Check the Wiring for a Short 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 all other terminals on the P1 connector.
Greater than 1 k
Ohm
Result: At least one of the resistance measurements is less
than 1 k Ohm
The fault is in the wiring between the air filter restriction switch
and the P1 ECM connector.
Check all wiring between the switch and the ECM. Refer 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: All resistance measurements are greater than 1 k
Ohm.
Contact the Dealer Solution Network (DSN).
5. 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.
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 6.
(continued)
228 UENR0612
Circuit Tests
This document has been printed from SPI2. NOT FOR RESALE
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