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P0820


P0820 GEAR LEVER POSITION SENSOR





Description





Gear lever position sensor is installed in transmission and detects the gear position. When shift lever is shifted, position sensor magnet on striking rod in transmission moves and changes magnetic field of the coil in gear lever position sensor. Gear lever position sensor converts the changes in magnetic field to voltage signals and transmits them to ECM. ECM detects the gear position by these voltage signal changes.




DTC Logic

DTC DETECTION LOGIC

NOTE:
- If DTC P0820 is displayed with DTC P0335, P0340 or P0345, first perform the trouble diagnosis for
DTC P0335, P0340 or P0345. Refer to P0335 or P0340.
- If DTC P0820 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to P0500.






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES - Go to "Diagnosis Procedure".
NO - GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Start engine.
2. Drive the vehicle in every gear position from 1st to 6th gear for 10 seconds each at 20 km/h or more.

NOTE:
Fully depress clutch pedal when shifting and fully release clutch pedal after gear shifting is complete.

CAUTION:
Always drive vehicle at a safe speed.
3. Check DTC.
Is DTC detected?
YES - Go to "Diagnosis Procedure".
NO - INSPECTION END




Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connection.
2.CHECK GEAR LEVER POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect gear lever position sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between gear lever position sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 3.
3.CHECK GEAR LEVER POSITION SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between gear lever position sensor harness connector and ECM harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair open circuit.
4.CHECK GEAR LEVER POSITION SENSOR POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair short to ground or short to power in harness or connectors.
5.CHECK COMPONENTS
Check the following.
- Crankshaft position sensor (POS) (Refer to P0335.)
- Brake booster pressure sensor (Refer to P0555.)
- EVAP control system pressure sensor (Refer to P0451.)
- Refrigerant pressure sensor (Refer to Without 7 Inch Display.)
Is the inspection result normal?
YES - GO TO 6.
NO - Replace malfunctioning component.
6.CHECK APP SENSOR
Refer to P2122.
Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 7.
7.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Go to P2122.
- INSPECTION END
8.CHECK GEAR LEVER POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between gear lever position sensor harness connector and ECM harness connector.





4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 9.
NO - Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK GEAR LEVER POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between gear lever position sensor harness connector and ECM harness connector.





2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 10.
NO - Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK GEAR LEVER POSITION SENSOR
Refer to "Component Inspection".
Is the inspection result normal?
YES - GO TO 12.
NO - GO TO 11.
11.REPLACE GEAR LEVER POSITION SENSOR
1. Replace gear lever position sensor.
2. Go to "Special Repair Requirement".
- INSPECTION END
12.CHECK TRANSMISSION SHIFT CONTROL
Refer to Testing and Inspection.
Is the inspection result normal?
YES - GO TO 13.
NO - Repair or replace.
13.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END




Component Inspection
1.CHECK GEAR LEVER POSITION SENSOR-I
1. Turn ignition switch OFF.
2. Disconnect gear lever position sensor harness connector.
3. Remove the sensor.





4. Visually check the sensor for chipping.
Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 3.
2.CHECK GEAR LEVER POSITION SENSOR-II
Check resistance between gear lever position sensor terminals as per the following items.





Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 3.
3.REPLACE GEAR LEVER POSITION SENSOR
1. Replace gear lever position sensor.
2. Go to "Special Repair Requirement".
- INSPECTION END




Special Repair Requirement
1.PERFORM M/T NEUTRAL POSITION LEARNING
Refer to Special Repair Requirement.
- END
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