A99233
Ignition Switch Signal
Vane Nozzle
Position Signal
Turbo Motor Driver DC Motor
Activation Signal
ECM DC Motor
Vane Nozzle
Opening Angle
Signal
Motor Status
Signal
ECT Sensor
Engine Speed
Accelerator Position
Turbo Pressure
Barometric Pressure
Vane Nozzle
Position Sensor
M+
M–
VNVC
VTA
VNE2
05–482
–DIAGNOSTICS ECD SYSTEM (1KD–FTV)(From August, 2004)
DTC P0045/34 TURBO/SUPER CHARGER BOOST
CONTROL SOLENOID CIRCUIT / OPEN
CIRCUIT DESCRIPTION
The turbocharger system is comprised of the Variable Nozzle (VN) type turbocharger, the turbo motor drover
and ECM.
The turbocharger has nozzle vane which opens and closes to control the volume of the exhaust gas flowing
into the turbine. This, in turn, controls the boost pressure, When the nozzle vane moves towards the closing
direction, the pressure increases. When the vane moves towards the opening direction, the pressure de-
creases.
The turbocharger actuator built on the turbine side activates the nozzle vane. The nozzle vane position sen-
sor built on the actuator detects the opening angle of nozzle vane. The nozzle vane position sensor signal
is sent via the turbo motor driver to the ECM. Then, based on the signal, the ECM actuates the actuator.
The ECM sends a target nozzle vane position signal to the turbo motor driver to obtain the nozzle vane posi-
tion for the optimal boost pressure in accordance with the driving conditions.
DTC No. DTC Detection Condition Trouble Area
P0045/34
SOpen or short in turbo motor driver circuit continues for 0.5
seconds or more
SWhen communication error occurs between turbo motor and
ECM
(1 trip detection logic)
STurbo motor driver
SOpen or short in turbo motor driver circuit
STurbocharger sub–Assy
SECM
MONITOR DESCRIPTION
This DTC is detected 5 seconds after the ignition switch is turned ON.
05M51–02
G38686
From
MAIN Relay
VNTI
A54
Air Vent Control Servo Motor
T16
Turbo Motor Driver
A53
Air Vent Control Servo Motor
R–B
L
W–L
1
2
3
2
1
10
3
5
2
1
8
6
9
417
10
E17
E17 VNTO
B
WM+
M–
VNVC
VNE2
VTA1
+B
GND
VNTI
VNTO
R–L
P–B
W–B
CBR
C
EF
BR
ECM
J/11
J/C
Shielded
–DIAGNOSTICS ECD SYSTEM (1KD–FTV)(From August, 2004)
05–483
WIRING DIAGRAM
A81089
B58514
G34920
1234
5678910
Wire Harness Side
T16
Turbo Motor Driver
VNTI
VNTO
VNTO
VNTI
E17
05–484
–DIAGNOSTICSECD SYSTEM(1KD–FTV)(From August, 2004)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using theintelligent tester II. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, and other data from the time the malfunction oc-
curred.
1INSPECT TURBOCHARGER SUB–ASSY (DC MOTOR) (See page 13–1)
NGREPLACE TURBOCHARGER SUB–ASSY
(See page 13–10)
OK
2INSPECT TURBO MOTOR DRIVER (See page 13–1)
NG REPLACE TURBO MOTOR DRIVER
OK
3 CHECK WIRE HARNESS (TURBO MOTOR DRIVER – ECM)
(a) Disconnect the E17 ECM connector.
(b) Disconnect the T16 turbo motor driver connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester Connection Specified Condition
E17–10 (VNTO) – T16–9 (VNTO)
E17–17 (VNTI) – T16–4 (VNTI) Below 1 Ω
E17–10 (VNTO) or T16–9 (VNTO) – Body ground
E17–17 (VNTI) or T16–4 (VNTI) – Body ground 10 kΩ or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
B58514
A99230
A52933 G34921
A54
Nozzle Vane Position Sensor
12 34
56 78910
T16
Turbo Motor Driver
VNE2VNVC
Wire Harness Side
A53
DC Motor
VTA1
VNVCVTA1 VNE2
M+M–
M–
M+
–DIAGNOSTICS ECD SYSTEM (1KD–FTV)(From August, 2004)
05–485
4 CHECK WIRE HARNESS (TURBO MOTOR DRIVE – NOZZLE VANE POSITION
SENSOR, TURBO MOTOR DRIVE – DC MOTOR)
(a) Disconnect the T16 turbo motor drive connector.
(b) Disconnect the A54 nozzle vane position sensor connec-
tor.
(c) Disconnect the A53 DC motor connector.
(d) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester Connection Specified Condition
T16–1 (VNVC) – A54–3 (VNVC)
T16–5 (VTA1) – A54–1 (VTA1)
T16–2 (VNE2) – A54–2 (VNE2)
T16–10 (M+) – A53–2 (M+)
T16–3 (M–) – A53–1 (M–)
Below 1 Ω
T16–1 (VNVC) or A54–3 (VNVC) – Body ground
T16–5 (VTA1) or A54–1 (VTA1) – Body ground
T16–2 (VNE2) or A54–2 (VNE2) – Body ground
T16–10 (M+) or A53–2 (M+) – Body ground
T16–3 (M–) or A53–1 (M–) – Body ground
10 kΩ or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE ECM (See Pub. No. RM990E, page 10–34)
NOTICE:
After replacing the ECM, allow for ECM learning start the engine and idle it until it is fully warmed up.
1
/
4
100%