Troubleshooting

(Table 102, contd)
Troubleshooting Test Steps
Values Results
7. Create an Open Circuit at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the throttle position sensor with the -3 diagnos-
tic code.
C. Turn the keyswitch to the ON position. Wait for at least 10
seconds for activation of the diagnostic codes.
D. Use the electronic service tool to check the “Active Diag-
nostic Code” screen. Check for an -4 diagnostic code.
E. Turn the keyswitch to the OFF position.
Diagnostic
Codes
Result: A -4 diagnostic code became active after disconnect-
ing the sensor.
Install a replacement sensor.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: There is still an active -3 diagnostic code with the sen-
sor disconnected.
Proceed to Test Step 8.
8. Check for a Short Circuit in the Wiring for the Sensor
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect throttle position sensor. Discon-
nect the P1 connector from the ECM.
C. Use a suitable multimeter to measure the resistance be-
tween the sensor signal terminal on the P1 connector and all
other terminals on the P1 connector.
Greater than 1
k Ohm
Result: At least one of the resistance measurements is great-
er than 1 k Ohm.
There is a short in the wiring for the sensor.
Repair: Check all wiring between the suspect sensor 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).
9. Create a Short Circuit at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the throttle position sensor
with the XX-4 diagnostic code.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Insert one end of the jumper wire into the terminal for the 5
V supply on the harness connector for the suspect sensor. In-
sert the other end of the jumper wire into the signal terminal
on the harness connector for the suspect sensor.
E. Turn the keyswitch to the ON position
F. Access the “Active Diagnostic Codes” screen on the elec-
tronic service tool and check for an active -3 diagnostic code
for the suspect sensor.
G. Remove the jumper.
Diagnostic
codes
Result: A -3 diagnostic code is active when the jumper is
installed.
Install a replacement sensor.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: A -4 diagnostic code remains active when the jumper
is installed.
Proceed to Test Step 10.
(continued)
UENR0612-07 223
Circuit Tests
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