(Table 98, contd)
Troubleshooting Test Steps
Values
Results
7. Check the Wastegate Regulator Return Wire for an
Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the wastegate regulator and the P2 connector.
C. Use a suitable multimeter to measure the resistance be-
tween P2:4 and terminal 2 on the harness connector for the
wastegate regulator.
Diagnostic
codes
Result:
The measured resistance is greater than 5 Ohms.
The fault is in the wiring between the wastegate regulator 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 measured resistance is less than 5 Ohms.
Proceed to Test Step 10.
8. Create an Open Circuit at the Solenoid
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the suspect solenoid valve.
C. Turn the keyswitch to the ON position. Check for active di-
agnostic codes on the electronic service tool. Wait at least 30
seconds for activation of the diagnostic codes.
D. Turn the keyswitch to the OFF position.
Diagnostic
codes
Result:
An XXXX-5 diagnostic code is active with the valve
disconnected.
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:
An XXXX-6 diagnostic code is still active with the valve
disconnected.
Proceed to Test Step 9.
9. Create an Open Circuit at the ECM
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector from the ECM.
C. Turn the keyswitch to the ON position. Wait at least 30 sec-
onds for activation of the diagnostic codes.
D. Use the electronic service tool to check for active diagnos-
tic codes.
Note:
Diagnostic codes for all of the engine sensors will be ac-
tive with the P2 connector disconnected. Ignore all other co-
des and only look for codes that relate to the suspect valve.
E. Turn the keyswitch to the OFF position.
Diagnostic
codes
Result:
An XXXX-5 diagnostic code is active with the P2 con-
nector disconnected.
The fault is in the wiring between the suspect 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 XXXX-6 diagnostic code is still active with the P2
connector disconnected.
Proceed to Test Step 10.
10. Check if a Replacement ECM Eliminates the Fault
A. Contact the Dealer Solution Network (DSN).
B. If the DSN recommends the use of a replacement ECM, in-
stall a replacement ECM. Refer to Troubleshooting, “Replac-
ing the ECM”.
C. Use the electronic service tool to recheck the system for ac-
tive diagnostic codes.
Diagnostic
codes
Result:
There are no active diagnostic codes with the replace-
ment ECM.
Reconnect the suspect ECM. If the fault returns with the sus-
pect ECM, replace the ECM.
Use the electronic service tool in order to clear all logged diag-
nostic codes and then verify that the repair eliminates the fault.
Result:
The diagnostic code is still present with the replace-
ment ECM.
Contact the DSN.
204
UENR0612
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