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6.LOW SIDE DRIVER HARNESS OPEN
Measure the resistance of the Bank 2 low side driver circuit between
the ECM connector and the injector harness connector.
Is the resistance less than 10 Ohms?
Ye s>>
Te s t C o m p l e t e .
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No>>
Replace or repair the open engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
Page 562 of 5267
P0217-DECREASED ENGINE PERFORMANCE DUE TO ENGINE OVERHEAT
CONDITION
Page 563 of 5267

For a complete wiring diagramRefer to Section 8W.
When Monitored:
While the engine is running. .
Set Condition:
The engine coolant temperature is above a calibrated value for a calibratedamountoftime.
Possible Causes
ECT SENSOR
OTHER DTC’S
MECHANICAL FAILURE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S
With the scan tool, read DTCs.
Are other Cooling system DTC’s present?
Ye s>>
Trouble shoot the other DTC’s first.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 2
2.ECT SENSOR
Allow the engine to reach normal operating temperature.
Use a temperature probe and measure the engine temperature near the ECT Sensor.
With the scan tool, read the Engine Temperature.
Compare the temperature probe reading with the scan tool reading.
Are the readings within 10° of each other?
Ye s>>
Repair the cause of mechanical failure.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Replace the coolant temp sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
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P0219-CRANKSHAFT POSITION SENSOR OVER SPEED SIGNAL
For a complete wiring diagramRefer to Section 8W.
Page 565 of 5267

When Monitored:
While the engine is running.
Set Condition:
The ECM detects engine speed is above a calibrated threshold.
Possible Causes
OTHER DTC’S
MECHANICAL OVERSPEED OF ENGINE
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S
Turn the ignition on.
With the scan tool, read and record the freeze frame data.
With the scan tool, read the Engine DTC’s.
Is there other Crankshaft position sensor DTC’s set?
Ye s>>
Refer to symptom list for problems related to the other Crankshaft positionsensorDTC’s.
No>>
Go To 2
2.MECHANICAL OVERSPEED OF ENGINE
Visually inspect the engine for signs of mechanical overspeed. Such as, bent push rod, broken rocker arms, bent
valves, etc.
Did you notice any overspeed damage?
Ye s>>
Repair or replace any damaged components.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Te s t C o m p l e t e .
Page 566 of 5267

P0234-TURBOCHARGER OVERBOOST CONDITION
For a complete wiring diagramRefer to Section 8W.
When Monitored:
While running.
Set Condition:
The intake air pressure is above a calibrated value for a calibrated amountof time.
Possible Causes
OTHER DTC’S
WASTEGATE STUCK
TURBOCHARGER AND/OR WASTEGATE DAMAGE
WASTEGATE
TURBOCHARGER
WASTEGATE CONTROL VALVE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.OTHER DTC’S
With the scan tool, read DTCs.
Do you have additional DTC’s?
Ye s>>
Repair all other DTC’s first.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 2
2.TURBOCHARGER AND/OR WASTEGATE DAMAGE
Visually inspect the turbocharger assembly for signs of damage. Pay particular attention to the Wastegate area and
linkage.
Was any damage noticed?
Ye s>>
Repair or replace the Turbocharger or Wastegate.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 3
3.WASTEGATE
Pressure the Intake air system per test *INTAKE AIR SYSTEM PRESSURE TEST.
Pay particular attention to the Wastegate signal line and the Wastegate actuator canister area for leaks.
Were any leaks detected?
Ye s>>
Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Go To 4
Page 567 of 5267
4.TURBOCHARGER
Disconnect the wiring connector at the Wastegate Control Valve.
Remove the Wastegate Control Valve from the turbo.
Inspect the o-rings and the valve for damage.
Replace any damaged o-rings or a damaged valve.
Using a pressure/vacuum hand pump, apply vacuum to the tip of the WastegateControl Valve.
Use your fingers to cover and seal the two radial holes located between the two small o-rings on the tip of the
valve.
The valve should hold vacuum.
Does the Wastegate Control Valve hold vacuum?
Ye s>>
Repair or replace the Turbocharger.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No>>
Replace the Wastegate Control Valve.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
Page 568 of 5267
P0236-MAP SENSOR TOO HIGH TOO LONG
For a complete wiring diagramRefer to Section 8W.