Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSNISSAN-DATSUN2004ALTIMA S, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEM - 2.5LDTC P2135: TP SENSORDIAGNOSTIC PROCEDURE

2004 Nissan-Datsun Altima S, Automatic

Diagnostic Procedure

2004 Nissan-Datsun Altima S, AutomaticSECTION Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Checking Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 2.
2. NG : Repair or replace ground connections.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Electric Throttle Control Actuator Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.
  Voltage: Approximately 5V
  
  Fig 3: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 7.
2. NG : GO TO 3.
CHECK THROTTLE POSITION SENSOR 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 .
  Continuity should exist.
OK or NG
1. OK : GO TO 4.
2. NG : Repair or replace open circuit.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III

Check the following.

Harness for short to power and short to ground, between the following terminals.

ECM TERMINALS REFERENCE

ECM terminal	Sensor terminal Reference	Wiring Diagram
47	Electric throttle control actuator terminal 1	WIRING DIAGRAM
91	APP sensor terminal 1	WIRING DIAGRAM

OK or NG

OK : GO TO 5.
NG : Repair short to ground or short to power in harness or connectors.

CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK : GO TO 11.
2. NG : GO TO 6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
3. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
4. Perform "IDLE AIR VOLUME LEARNING ".
1. >> INSPECTION END
CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between electric throttle control actuator terminal 5 and ground. Refer to Wiring Diagram .
  Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK : GO TO 8.
2. NG : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4, ECM terminal 69 and electric throttle control actuator terminal 2. Refer to Wiring Diagram .
  Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK : GO TO 9.
2. NG : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK THROTTLE POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK : GO TO 11.
2. NG : GO TO 10.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
3. Perform "IDLE AIR VOLUME LEARNING ".
1. >> INSPECTION END
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. >> INSPECTION END

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.