[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P081D: NEUTRAL POSITION SWITCH CIRCUIT<M/T><M/T>
Code No. P081D: Neutral Position Switch Circuit <M/T>
 
 
 
 
OPERATION
  • The power voltage is supplied to the neutral position switch from the engine control relay.
  • The ON/OFF signal is inputted to the engine-ECU connector terminal NLSW from the neutral position switch.
 
 
FUNCTION
  • The engine-ECU detects the gearshift lever position by using the signals of the neutral position switch.
  • In response to the signal, the engine-ECU controls the AS&G system.
 
 
TROUBLE JUDGEMENT
Check Conditions
  • Ignition switch is "ON" position.
  • Diagnosis code No. P0833 is not detected.
  • Ambient temperature is more than -5°C
  • Diagnosis code No. U0121 is not detected.
Judgement Criterion
  • When you drive the vehicle at more than 60 km/h at least one time, the ON/OFF signal of the neutral position switch does not change even once although the ON/OFF signal of the clutch interlock switch is detected more than 10 times.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • In the normal operation, the auto stop is prohibited.
 
 
PROBABLE CAUSES
  • Open/short circuit or harness damage in neutral position switch circuit or loose connector contact
  • Failed neutral position switch
  • Failed installation of neutral position switch
  • Failed system inside transmission
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. item 188: Neutral position switch (AS&G)
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.
 
STEP 2. Continuity check on neutral position switch connector.
  • Disconnect connector, and check at switch side.
  • Continuity check between terminals.
OK:
  • Continuity (Gearshift lever position: Neutral)
  • No continuity (Gearshift lever position: Except neutral)
Is the check result normal?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check the installation state of the neutral position switch.
Is the check result normal?
Go to Step 4.
Repair.
 
STEP 4. Check the neutral position switch itself.
  • Check the neutral position switch itself (Refer to GROUP 22A - On-vehicle service - Neutral Position Switch Check ).
Is the check result normal?
The area affecting the neutral position switch inside the transmission can possibly be abnormal. Overhaul and repair the transmission, or change the transmission.
Replace the neutral position switch.
 
STEP 5. Perform voltage measurement at neutral position switch connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal power supply line and body earth.
OK: System voltage
Is the check result normal?
Go to Step 6.
Repair the connector(s), or check and repair of short to earth, and open circuit in power supply line between engine control relay connector and neutral position switch connector.
 
STEP 6. Check of damage in power supply line between engine control relay connector and neutral position switch connector.
Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.
 
STEP 7. Check of short to earth, open circuit, and damage in NLSW line between neutral position switch connector and engine-ECU connector.
Is the check result normal?
Go to Step 8.
Repair the connector(s) or wiring harness.
 
STEP 8. M.U.T.-IIISE diagnosis code
  • Reconfirmation of the diagnosis code.
Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).