2003 NISSAN TEANA Power

EC-478
[VQ]
DTC P0117, P0118 ECT SENSOR

3. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connectors.
3. Check harness continuity between ECM terminal 67 and ECT sensor terminal 2.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-478, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace engine coolant temperature sensor.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionBBS004ZH
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

2. If NG, replace engine coolant temperature sensor.
Removal and InstallationBBS004ZI
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-52, "WATER OUTLET AND WATER PIPING" . Continuity should exist.
PBIB2005E
Engine coolant temperature°C
(°F)Resistance kΩ
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P

EC-482
[VQ]
DTC P0122, P0123 TP SENSOR

Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureBBS004ZO
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-457, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
47 WSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
50 Y Throttle position sensor 1[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: ReleasedMore than 0.36V
[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: Fully depressedLess than 4.75V
66 LSensor ground
(Throttle position sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
69 G Throttle position sensor 2[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: ReleasedLess than 4.75V
[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: Fully depressedMore than 0.36V
91 PSensor power supply
(APP sensor 2)[Ignition switch: ON]Approximately 5V
PBIB2160E

DTC P0122, P0123 TP SENSOR
EC-483
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC

2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 3.
3. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47.
Refer to Wiring Diagram.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit.
4. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors.
5. CHECK APP SENSOR
Refer to EC-659, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> GO TO 6.
PBIB2107E
Voltage: Approximately 5V
PBIB0082E
Continuity should exist.
ECM terminal Sensor terminal Reference Wiring Diagram
47 Electric throttle control actuator terminal 1EC-481
91 APP sensor terminal 1EC-654

EC-484
[VQ]
DTC P0122, P0123 TP SENSOR

6. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-389, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-389, "
Throttle Valve Closed Position Learning" .
4. Perform EC-389, "
Idle Air Volume Learning" .
>>INSPECTION END
7. CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 69.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK THROTTLE POSITION SENSOR
Refer to EC-485, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-389, "
Throttle Valve Closed Position Learning" .
3. Perform EC-389, "
Idle Air Volume Learning" .
>>INSPECTION END
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
Continuity should exist.

EC-492
[VQ]
DTC P0132, P0152 HO2S1

2. RETIGHTEN HEATED OXYGEN SENSOR 1
1. Loosen and retighten heated oxygen sensor 1.
>> GO TO 3.
3. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 78 and HO2S1 terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.Tightening torque: 50 N·m (5.1 kg-m, 37 ft-lb)
PBIB2144E
Continuity should exist.
PBIB2468E

DTC P0132, P0152 HO2S1
EC-493
[VQ]
C
D
E
F
G
H
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J
K
L
MA
EC

4. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK HO2S1 CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Check connectors for water.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness or connectors.
6. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-494, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace malfunctioning heated oxygen sensor 1.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
DTCTe r m i n a l s
Bank
ECM Sensor
P0132 35 1 1
P0152 16 1 2
Continuity should exist.
DTCTe r m i n a l s
Bank
ECM Sensor
P0132 35 1 1
P0152 16 1 2
Continuity should not exist.
Water should not exist.

EC-502
[VQ]
DTC P0134, P0154 HO2S1

2. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 78 and HO2S1 terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-503, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning heated oxygen sensor 1.Continuity should exist.
PBIB2468E
DTCTerminals
Bank
ECM Sensor
P0134 35 1 1
P0154 16 1 2
Continuity should exist.
DTCTerminals
Bank
ECM Sensor
P0134 35 1 1
P0154 16 1 2
Continuity should not exist.

EC-508
[VQ]
DTC P0222, P0223 TP SENSOR

Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureBBS0050K
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-457, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
47 WSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
50 Y Throttle position sensor 1[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: ReleasedMore than 0.36V
[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: Fully depressedLess than 4.75V
66 LSensor ground
(Throttle position sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
69 G Throttle position sensor 2[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: ReleasedLess than 4.75V
[Ignition switch: ON]

Engine: Stopped

Shift lever: D

Accelerator pedal: Fully depressedMore than 0.36V
91 PSensor power supply
(APP sensor 2)[Ignition switch: ON]Approximately 5V
PBIB2160E