Troubleshooting

Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
Table 47
Troubleshooting Test Steps
Values Results
1. Air Inlet and Exhaust Restrictions
A. Check the air filter for damage.
B. Check the air inlet and exhaust system for restrictions and/
or leaks. Refer to Systems Operation, Testing, and Adjusting,
“Air Inlet and Exhaust System - Inspect”.
Air inlet and ex-
haust system
Result: Defects found in the air inlet or exhaust systems.
Repair: Repair any defects. Replace damaged components.
Result: The air inlet and exhaust systems are OK.
Proceed to Test Step 2.
2. Turbocharger Wastegate
A. Check the operation of the turbocharger wastegate.
B. Check the operation of the wastegate actuator. Refer to
Systems Operation, Testing, and Adjusting, “Turbocharger -
Inspect”.
Turbocharger
wastegate
Result: There is a suspected fault in the wastegate or the
wastegate actuator.
Repair: Replace the turbocharger. Refer to Disassembly and
Assembly, “Turbocharger - Remove” and Disassembly and
Assembly, “Turbocharger - Install”.
Result: The wastegate and the wastegate actuator operate
correctly.
Proceed to Test Step 3.
3. Wastegate Regulator
A. Use the electronic service tool to check for diagnostic trou-
ble codes that relate to the wastegate regulator.
Wastegate
regulator
Result: Diagnostic codes are present that relate to the waste-
gate regulator.
Repair: Rectify the cause of any related codes. Refer to Trou-
bleshooting, “Diagnostic Trouble Codes”.
Result: There are no diagnostic codes that relate to the
wastegate regulator.
Contact the Dealer Solution Network (DSN).
i06225887
Intake Manifold Air Pressure Is
Low
This procedure covers the following diagnostic code:
104 UENR0612-07
Symptom Troubleshooting
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