DTC P0045 (Flash Code 33) • The VNT control module detects an open
Circuit Description circuit,short to ground or short to voltage circuit on
the solenoid circuit.
The position of the turbocharger nozzle is controlled by
• The VNT control module detects solenoid ornozzle
the variable nozzle turbocharger (VNT) control module
control is stuck condition.
based on the command from the ECM. The VNT
control module controls a drive signal to the
Action Taken When the DTC Sets
turbocharger nozzle control solenoid that installed to
the turbocharger assembly by utilizing position sensor • The ECM illuminates the MIL when the
inputs to control the turbocharger nozzles. When the diagnosticruns and fails. Refer to DTC Type
engine is not under load, the turbocharger nozzles are Definitions for Action Taken When the DTC Sets -
in an open position, or no boost condition. When the Type A.
engine is under load, the VNT control module • The ECM limits fuel injection quantity.
commands the control solenoid to close the • The ECM inhibits EGR control.
turbocharger nozzles, thus increasing the boost. The
ECM will vary the boost dependant upon the load Condition for Clearing the DTC
requirements of the engine. The VNT control module
has the ability to perform internal diagnostics for • Refer to DTC Type Definitions for Condition
voltage and signal input and output status. If the VNT forClearing the MIL/ DTC - Type A.
control module senses an error in the nozzle position
signals, solenoid control signal, or VNT control module Diagnostic Aids
voltage error, the VNT control module will send a • If an intermittent condition is suspected, refer
message to the ECM via the controller area network toIntermittent Conditions in this section.
(CAN) communication bus and sets this DTC. • A sticking or intermittently sticking the
turbocharger nozzle control actuator may set this
Condition for Running the DTC DTC.
• The battery voltage is between 20 to 32 volts.
• The ignition switch is ON. Notice: If the VNT control module detects an open
circuit on the solenoid circuit, the Vane Control
Condition for Setting the DTC Solenoid Error parameter on the scan tool indicates
Stuck.
Either of following condition is met:
• The VNT control module detects system voltage Schematic Reference: Engine Controls Schematics
istoo high. Connector End View Reference: Engine Controls
• The VNT control module detects all nozzle Connector End Views or ECM Connector End Views
positionsensor signal are stuck low or high.
Circuit/ System Testing DTC P0045
Step Action Value(s) Yes No
Did you perform the Diagnostic System Go to Diagnostic
1 Check - Engine Controls? — System Check -
Go to Step 2 Engine Controls
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
2
4. Observe the Turbocharger Control Module —
Error parameter with a scan tool.
Does the scan tool indicate High Voltage? Refer to DTC P0563 Go to Step 3
Observe the Vane Control
Solenoid Error parameter with a
scan tool.
3 —
Does the scan tool indicate Stuck or Short
Circuit? Go to Step 5 Go to Step 4
Observe the Vane Position Sensor Error
parameter with a scan tool.
4 —
Does the scan tool indicate All High or All Go to Diagnostic
Low? Go to Step 9 Aids
Step Action Value(s) Yes No
1. Inspect the turbocharger assembly for the
following conditions:
• Physical damage of turbocharger
• Turbocharger nozzle control
linkagedamaged
• Physical damage of VNT actuator
5 —
&sensor
• Loose or improper installation of
VNTactuator & sensor
2. Repair or replace as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 6
1. Turn OFF the ignition.
2. Disconnect the VNT actuator & sensor
harness connector.
3. Connect a test lamp between the each
solenoid circuit (pins 6, 7 and 8 of E-2) and a
known good ground.
4. Turn ON the ignition, with the engine OFF.
6 —
Notice: Ignition switch must be cycled when
the test lamp is probed to other positions.
Is there circuit which did not illuminate, or
continuously illuminate the test lamp (note
that the test lamp illuminate then go out
normally)? Go to Step 8 Go to Step 7
1. Test the solenoid circuit between the VNT
control module (pins 10, 11 and 12 of E-4)
and the actuator & sensor (pins 6, 7 and 8 of
7 E-2) for a short circuit each other. —
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 16
1. Test the solenoid circuits (which ever circuit
did not illuminate, or continuously illuminate at
Step 6) between the VNT control module
(pins 10, 11 and 12 of E-4) and the actuator &
sensor (pins 6, 7 and 8 of E-2) for the
following conditions:
• An open circuit
8 • A short to ground —
• A short to battery or ignition voltage
• A short to the position sensor circuit
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 17
1. Turn OFF the ignition.
2. Connect a DMM between the position sensor
reference voltage circuit (pin 1 of E-2) and a
known good ground. 8.0 to 10.0
9
3. Turn ON the ignition, with the engine OFF. volts
Is the DMM voltage within the specified
value? Go to Step 10 Go to Step 13
Step Action Value(s) Yes No
Connect a DMM between the each position sensor
signal circuit (pins 2, 3 and 4 of E-2) and a known
good ground. 4.0 to 6.0
10
volts
Is there circuit which did not voltage reading
within the specified value? Go to Step 14 Go to Step 11
1. Test the position sensor signal circuits
between the VNT control module (pins 1, 2
and 3 of E-4) and the actuator & sensor (pins
2, 3 and 4 of E-2) for a short circuit each
11
other. —
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 12
Connect a DMM across the position sensor
reference voltage circuit and the low reference
circuit (pins 1 and 5 of E-2). 8.0 to 10.0
12
volts
Is the DMM voltage more than the specified
value? Go to Step 16 Go to Step 15
1. Test the position sensor reference voltage
circuit between the VNT control module (pin 8
of E-4) and the actuator & sensor (pin 1 of
E2) for the following conditions:
• An open circuit
• A short to ground
13 —
• A short to the low reference circuit
• A short to battery or ignition voltage
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 17
1. Test the position sensor signal circuits (which
ever voltage reading did not read within the
specified value at Step 10) between the VNT
control module (pins 1, 2 and 3 of E-4) and
the actuator & sensor (pins 2, 3 and 4 of E-2)
for the following conditions:
• An open circuit
• A short to ground
14 —
• A short to the low reference circuit
• A short to the reference voltage circuit
• A short to battery or ignition voltage
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 17
1. Test the position sensor low reference circuit
between the VNT control module (pin 4 of E-
4) and the actuator & sensor (pin 5 of E-2) for
15 an open circuit or high resistance. —
2. Repair the circuit(s) as necessary.
Did you find and correct the condition? Go to Step 20 Go to Step 17
Step Action Value(s) Yes No
1. Inspect for an intermittent, for poor
connections and corrosion at the harness
connector of the actuator & sensor (pins 1,
16 2, 3, 4, 5, 6, 7 and 8 E-2). —
2. Repair the connection(s) as necessary. Did
you find and correct the condition?
Go to Step 20 Go to Step 18
1. Turn OFF the ignition.
2. Disconnect the VNT control module harness
connector.
3. Inspect for an intermittent, for poor
17 connections and corrosion at the harness —
connector of the VNT control module (pins 1,
2, 3, 4, 8, 10, 11 and 12 of E-4).
4. Repair the connection(s) as necessary. Did
you find and correct the condition?
Go to Step 20 Go to Step 19
Replace the turbocharger. Refer to Turbocharger
Assembly in Section 1J Induction.
18 —
Did you complete the replacement? Go to Step 20 —
Replace the VNT control module. Refer to VNT
Control Module Replacement in Section 1J
19 Induction. —
Did you complete the replacement? Go to Step 20 —
1. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
20 5. Operate the vehicle within the Conditions for —
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition? Go to Step 2 Go to Step 21
Observe the DTC information with a scan tool.
21 Are there any DTCs that you have not —
diagnosed? Go to DTC List System OK
