LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (P-HEV Drive Motor System (Diagnostics)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0A3F-21: Drive Motor "A" Position Sensor Signal Amplitude < Minimum >> Notes

DTC P0A3F-21: Drive Motor "A" Position Sensor Signal Amplitude < Minimum: Notes

WARNING: This page is about a different variant/trim than selected.

1. - 

Detecting condition: 

Open or short circuit of MOTOR RESOLVER CIRCUIT

Detects that the Motor resolver signal deviates from the proper value (small amplitude).

(1 trip detection logic)

Trouble symptom: 

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
NOTE:
  • When the faulty phenomenon is not reproduced, perform a driving test on a road where vehicle vibration tends to occur so that the phenomenon may occur.
  • When the resolver has a malfunction, the vehicle may not be able to drive smoothly.
  • When it is difficult to check the connector for connecting condition, terminal deformation poor crimping, reconnect the connector after disconnecting once, and read DTCs again to check reproduction of the condition.
  • It may be poor connector connection if the DTC condition is not reproduced. However, the value may temporarily be outside the DTC detection threshold due to "vibrations", "temperature change due to elapsed time", etc. because of the connector inspection procedure. Therefore, be sure to perform the following inspection to check that there is no abnormality in other areas.
G13615827Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK DTC  .

    Read the following DTCs using Subaru Select Monitor. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    • P-HEV Hybrid Powertrain Control
    • P-HEV Drive Motor
    NOTE:
    Malfunction contents System Related DTC
    Insulation malfunction P-HEV Hybrid Powertrain Control P1C7C49 HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (A/C AREA) INTERNAL ELECTRONIC FAILURE
    P1C7D49 HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (HYBRID/EV BATTERY AREA) INTERNAL ELECTRONIC FAILURE
    P1C7E49 HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (TRANSAXLE AREA) INTERNAL ELECTRONIC FAILURE
    P1C7F49 HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION (DIRECT CURRENT AREA) INTERNAL ELECTRONIC FAILURE
    Power supply system malfunction P-HEV Drive Motor P06B01C GENERATOR CONTROL MODULE POSITION SENSOR REF POWER SOURCE CIRCUIT VOLTAGE OUT OF RANGE
    P06D61C GENERATOR CONTROL MODULE OFFSET POWER CIRCUIT VOLTAGE OUT OF RANGE

    When "Only P0A3F21 or P0A3F22 is displayed" or "DTC other than above is displayed at the same time", go to  A.

    When DTCs related to [P-HEV Hybrid Powertrain Control], mentioned above, are simultaneously displayed, go to  B.

    When DTCs related to [P-HEV Drive Motor], mentioned above, are simultaneously displayed, go to  C.

    Yes: 

    1. Go to  2.
    2. Perform the diagnosis for the simultaneously displayed DTCs.
      NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.
    3. Perform the diagnosis for the simultaneously displayed DTCs.
    NOTE: If more than one DTC is simultaneously displayed, perform the diagnosis in the order described in the above.

    No:  -

  2. CHECK THE CONNECTING CONDITION OF CONNECTOR (Inverter with converter assembly LOW PRESSURE CONNECTOR)  .
    CAUTION: Make sure to wear insulated gloves and protective goggles during the work.
    1. Check that the Service plug is disconnected. Ref. to HYBRID ELECTRIC VEHICLE>SERVICE PLUG .
    2. Check the connecting condition of low pressure connectors (HV23) and (HV24) in Inverter with converter assembly and check the relevant terminals for contact pressure, deformation and intrusion of water or foreign matter. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .
    NOTE: When connecting the connector, insert to the end with the lock lever raised, then fold the lock lever completely until a click is heard. After connected, make sure that the lock claw does not loosen and pull the connector to see that it does not come off.

    Is there looseness at the connector connection, or any poor contact, deformation or intrusion of water or foreign matter at the relevant terminals?

    Yes:  Connect the connector securely. Or repair the poor contact of connector.

    No:  Go to  3.

  3. CHECK MOTOR RESOLVER CIRCUIT  .

    Check MOTOR RESOLVER CIRCUIT. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>MOTOR RESOLVER CIRCUIT .

    Is the MOTOR RESOLVER CIRCUIT OK?

    Yes:  Replace Inverter with converter assembly. Ref. to HYBRID ELECTRIC VEHICLE>INVERTER AND CONVERTER ASSEMBLY .

    No:  Repair according to MOTOR RESOLVER CIRCUIT inspection.

scientia non olet · About LEMON Manuals