(Table 98, contd)
Troubleshooting Test Steps Values Results
4. Create a Short Circuit in the Harness at the Solenoid
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the suspect solenoid.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Install the wire between the two pins on the harness con-
nector for the suspect solenoid in order to create a short
circuit.
E. Turn the keyswitch to the ON position. Check for active di-
agnostic codes on the electronic service tool.
F. Remove the jumper wire from the connector for the solenoid
valve.
Diagnostic
codes
Result: An XXXX-6 diagnostic code is active when the jumper
is installed.
Temporarily connect a replacement for the suspect valve to the
harness.
Turn the keyswitch to the ON position. Use the electronic serv-
ice tool in order to check for active diagnostic codes. Wait at
least 30 seconds in order for the codes to be displayed.
If the fault is eliminated, reconnect the suspect valve. If the fault
returns, permanently install the replacement valve. Refer to
Disassembly and Assembly for the correct procedure.
Result: A 1076-5 diagnostic code is still active with the jumper
installed.
Proceed to Test Step 5.
Result: A 1188-5 diagnostic code is still active with the jumper
installed.
Proceed to Test Step 6.
5. Create a Short Circuit at the ECM Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector from the ECM.
C. Fabricate a jumper wire and install the jumper wire between
J2:15 and J2:60.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for an active 1076
diagnostic code. Wait at least 30 seconds for activation of the
diagnostic codes.
F. Turn the keyswitch to the OFF position.
G. Remove the jumper wire.
H. Reconnect the connectors.
Diagnostic
codes
Result: A 1076-6 diagnostic code is active with the jumper
installed.
The fault is in the harness between the fuel pump metering
valve connector and the P2 ECM connector.
Replace the faulty wiring. Use the electronic service tool to
clear all logged diagnostic codes and verify that the repair elimi-
nates the fault.
Result: The 1076-5 diagnostic code is still active with the jump-
er installed.
Proceed to Test Step 10.
6. Measure the Voltage at the Wastegate Regulator
Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the wastegate regulator.
C. Turn the keyswitch to the ON position.
D. Use a multimeter to measure the voltage between terminal
1 on the harness connector for the wastegate regulator and a
suitable ground.
10 V to 14 V Result: The measured voltage is not within the expected
range.
Check the fuse. If the fuse is blown, there is a short circuit in
the switched battery supply to the wastegate regulator
connector.
If the fuse is not blown, there is an open circuit in the switched
battery supply to the wastegate regulator connector.
Repair the faulty wiring or replace the faulty wiring. Use the
electronic service tool to clear all logged diagnostic codes and
verify that the repair eliminates the fault.
Result: The measured voltage is within the expected range.
Proceed to Test Step 8.
(continued)
UENR0612 203
Circuit Tests
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