Dtc P0045 (Flash Code 33) - Isuzu N 2008 Series Workshop Manual

DTC P0045 (Flash Code 33)

Circuit Description
The position of the turbocharger vanes is controlled by
the ECM. The ECM utilizes a turbocharger nozzle
control solenoid valve and a boost pressure sensor to
control the turbocharger nozzles. When the engine is
not under load, the turbocharger nozzles are in an open
position, or no boost condition. When the engine is
under load, the ECM commands the control solenoid
valve to close the turbocharger
increasing the boost. The ECM will vary the boost
dependant upon the load requirements of the engine.
The ECM uses a pulse width modulation (PWM) on the
control circuit to open and control the solenoid valve. If
the ECM detects an open circuit or short circuit on the
solenoid valve circuit, this DTC will set.
Condition for Running the DTC
• The battery voltage is between 18 to 32 volts.
• The ignition switch is ON.
• The turbocharger nozzle control solenoid is
commanded ON.
Condition for Setting the DTC
• The ECM detects an open circuit or short circuit
condition on the turbocharger nozzle control
solenoid circuit for longer than 6 seconds.
Circuit/ System Testing DTC P0045
Step
Did you perform the Diagnostic System Check -
1 Engine Controls?
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine and let idle for 30 seconds.
2
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
Is DTC P2527 set?
3
1. Turn OFF the ignition.
2. Disconnect the turbocharger nozzle control
solenoid valve harness connector.
3. Connect a test lamp between the ignition
4
voltage feed circuit (pin 1 of E13) and a known
good ground.
4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?
nozzles, thus
Action
Engine Control System (4JJ1)
Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
• The ECM limits fuel injection quantity.
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type A.
Diagnostic Aids
• If an intermittent condition is suspected, refer to
Intermittent Conditions in this section.
Test Description
The number below refers to the step number on the
Circuit/ System Testing.
3. If the solenoid control circuit is shorted to ground, the
solenoid is fully opened and allows the vacuum
pressure to become high enough to set DTC P2527.
Routing Reference: Vacuum Hose Routing Diagram
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Value(s) Yes
—
Go to Step 2
—
Go to Step 4
—
Go to Step 7
—
Go to Step 5
1A-61
No
Go to Diagnostic
System Check -
Engine Controls
Go to Step 3
Go to Diagnostic
Aids
Go to Step 6