TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Turn the ignition on.
Connect a jumper wire between the Boost Pressure Sensor Signal and 5-volt Supply
circuits.
With the DRB, read the Turbocharger Boost Pressure Sensor voltage.
Is the Boost Pressure Sensor voltage above 4.5 volts?
All
Yes
→
Replace the Turbocharger Boost Pressure/Intake Air Tempera-
ture Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
4
4
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Boost Pressure Sensor Signal
circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
5
No
→
Repair the Boost Pressure Sensor Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
5
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the Boost Pressure Sensor Signal circuit and Sensor
Ground circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
6
No
→
Repair the Boost Pressure Sensor Signal circuit for a short to the
Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.
6
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Boost Pressure Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
7
No
→
Repair the Boost Pressure Sensor Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
68
DRIVEABILITY - DIESEL
P0235-TURBOCHARGER BOOST SENSOR SIGNAL LOW EXCEEDED —
Continued