[ 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. P0132 LINEAR A/F SENSOR CIRCUIT HIGH VOLTAGE
Code No. P0132: Linear A/F Sensor Circuit High Voltage
 
 
 
 
OPERATION
The linear A/F sensor and the engine-ECU are connected by the following 3 lines to detect the air-fuel ratio.
  • The line between the linear A/F sensor and the engine-ECU connector terminal LPFL detects the air-fuel ratio.
  • The auxiliary line between the linear A/F sensor and the engine-ECU connector terminal LSFL detects the air-fuel ratio.
  • The line between the linear A/F sensor and the engine-ECU connector terminal LEFL is connected to earth.
 
 
FUNCTION
  • The engine-ECU effects air/fuel ratio feedback control in accordance with the signals from the linear A/F sensor.
  • If the linear A/F sensor has deteriorated, corrections will be made by the oxygen sensor (rear).
 
 
TROUBLE JUDGEMENT
Check Conditions
  • Battery positive voltage is more than 10 V and is less than 16.5 V.
  • More than 40 seconds have passed since the engine starting sequence was completed.
Judgement Criterion
  • The Ip+ input voltage is higher than the auxiliary battery positive voltage from which you subtract 1.2 V for 2 seconds.
or
  • The Vs+ input voltage is higher than auxiliary battery positive voltage from which you subtract 1.2 V for 2 seconds.
or
  • The COM input voltage is be higher than 6.2 V for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Does not control air-fuel ratio closed loop.
 
 
PROBABLE CAUSES
  • Failed linear A/F sensor
  • Short circuit in linear A/F sensor circuit or loose connector contact
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Check of short circuit in LSFL line between linear A/F sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
 
STEP 2. Check of short circuit in LPFL line between linear A/F sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Check of short circuit in LEFL line between linear A/F sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Replace the linear A/F sensor
  • After replacing the linear A/F sensor, reconfirm whether the diagnosis code is set.
Is the diagnosis code set?
Replace the engine-ECU.
Check end.