Troubleshooting

(Table 49, contd)
Troubleshooting Test Steps
Values Results
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.
Proceed to Test Step 4.
4. Turbocharger
Note: The turbocharger that is installed on the engine is a
nonserviceable item. If any mechanical fault exists, then the
turbocharger must be replaced.
A. Check that the compressor housings for the turbochargers
are free of dirt and debris.
B. Check that the turbine housings for the turbochargers are
free of dirt and debris.
C. Check that the turbine blades rotate freely in the
turbochargers.
Turbocharger Result: There is a fault with the turbocharger.
Repair: Replace the turbocharger. Refer to Disassembly and
Assembly, “Turbocharger - Remove” and Disassembly and
Assembly, “Turbocharger - Install”.
Result: The turbocharger is OK.
Contact the Dealer Solution Network (DSN).
i06225888
Intake Manifold Air
Temperature Is High
The Electronic Control Module (ECM) monitors the
intake manifold air for excessive temperature.
Use this procedure to determine the cause of high
intake manifold air temperature.
Probable Causes
• Coolant level
• Air-to-air aftercooler (ATAAC)
• Cooling fan
• Air inlet and exhaust system
• Ambient temperature
• Altitude
• Running condition
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
106 UENR0612-07
Symptom Troubleshooting
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