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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 143 (Plug-In Charge Control System - Diagnostic Codes (2 Of 3)) >> PLUG-IN CHARGE CONTROL SYSTEM (for PHEV Model) >> DTC P1CE9-31: Charger Cooling Fan Revolution Signal No Signal; DTC P1CE9-96: Charger Cooling Fan Revolution Signal Component Internal Failure [08/2023 - ] >> Procedure

DTC P1CE9-31: Charger Cooling Fan Revolution Signal No Signal; DTC P1CE9-96: Charger Cooling Fan Revolution Signal Component Internal Failure [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (PLUG-IN CONTROL) 

    Pre-procedure1

    1. Enter the following menus:

      Powertrain > Plug-in Control > Trouble Codes 

      Procedure1

    2. Check for DTCs.

      Result

      Result Proceed to
      P1CE9-31 or P1CE9-96 only is output, or DTCs except the ones in the table below are also output A
      DTCs of plug-in charge control system in the tables below are output B
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Plug-in charge control system P060B-49 Plug-in Control Module A/D Processing Internal Electronic Failure
      Communication system malfunction P0E5E-87 Plug-in Control Module Processor from Hybrid/EV Battery Charger Control Module Processor Missing Message
      U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message
      U1150-87 Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message

      HINT: 

      • P1CE9-31 and P1CE9-96 may be output as a result of the malfunction indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

      Post-procedure1

    3. None

    Result: 

    B 

    GO TO DTC CHART (PLUG-IN CHARGE CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ] 

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE CHARGER COOLING FAN) 

    Pre-procedure1

    1. Perform the "Activate the Charger Cooling Fan" Active Test.

      Powertrain > Plug-in Control > Active Test 

      Tester Display
      Activate the Charger Cooling Fan

      Procedure1

    2. Check that the charger cooling blower operates, air is sucked into the inlet duct and the operation sound is normal.

      Result

      The charger cooling blower operates.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (CHARGER COOLING BLOWER - ELECTRIC VEHICLE CHARGER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    2. Disconnect the H126 charger cooling blower connector.
    3. Disconnect the H124 electric vehicle charger assembly connector.

      Procedure1

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H126-3 (FTLS) - H124-67 (FTLS) Ignition switch off Below 1 Ω
      H126-3 (FTLS) and H124-67 (FTLS) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. Reconnect the electric vehicle charger assembly connector.
    6. Reconnect the charger cooling blower connector.

    Result: 

    OK 

    REPLACE ELECTRIC VEHICLE CHARGER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK CONNECTOR CONNECTION CONDITION (CHARGER COOLING BLOWER CONNECTOR) 

    Pre-procedure1

    1. None

      Procedure1

    2. Check the connector connection for the H126 charger cooling blower connector.
      GTY1204668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the contact pressure of each terminal of the H126 charger cooling blower connector and check for foreign matter or arc marks on the terminals.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      Result

      Result Proceed to
      The terminals are connected securely and there are no contact problems There is neither foreign matter nor ark marks A
      The terminals are not connected securely and there is a contact problem There is any of foreign matter or ark marks B
      The terminals are not connected securely and there is a contact problem There is neither foreign matter nor ark marks C
      The terminals are connected securely and there are no contact problems There is any of foreign matter or ark marks D

      Post-procedure1

    4. None

    Result: 

    B 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    C 

    CONNECT SECURELY 

    Result: 

    D 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    A 

    See step  5

  5. CHECK CONNECTOR CONNECTION CONDITION (ELECTRIC VEHICLE CHARGER ASSEMBLY CONNECTOR) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

      Procedure1

    2. Check the connector connection for the H124 electric vehicle charger assembly connector.
      GTY1204433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the contact pressure of each terminal of the H124 electric vehicle charger assembly connector and check for foreign matter or arc marks on the terminals.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2022 - ]

      Result

      Result Proceed to
      The terminals are connected securely and there are no contact problems There is neither foreign matter nor ark marks A
      The terminals are not connected securely and there is a contact problem There is any of foreign matter or ark marks B
      The terminals are not connected securely and there is a contact problem There is neither foreign matter nor ark marks C
      The terminals are connected securely and there are no contact problems There is any of foreign matter or ark marks D

      Post-procedure1

    4. None

    Result: 

    B 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    C 

    CONNECT SECURELY 

    Result: 

    D 

    REPLACE MALFUNCTIONING PARTS 

    Result: 

    A 

    See step  6

  6. CHECK CHARGER COOLING BLOWER (VISUALLY CHECK) 

    Pre-procedure1

    1. Remove the charger cooling blower.

      HINT: 

      Refer to REMOVAL [08/2023 - ]

      Procedure1

    2. Check the fan rotating part of the charger cooling blower for foreign matter.

      Result

      There is no foreign matter or the charger cooling blower is not clogged with foreign matter.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. Install the charger cooling blower.

    Result: 

    NG 

    REPLACE CHARGER COOLING BLOWER. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (CHARGER COOLING BLOWER - ELECTRIC VEHICLE CHARGER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    2. Disconnect the H126 charger cooling blower connector.
    3. Disconnect the H124 electric vehicle charger assembly connector.

      Procedure1

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H126-3 (FTLS) - H124-67 (FTLS) Ignition switch off Below 1 Ω
      H126-5 (FCTL) - H124-66 (FCTL) Ignition switch off Below 1 Ω
      H126-1 (FANB) - H124-69 (FANB) Ignition switch off Below 1 Ω
      H126-6 (FANG) - H124-23 (FANG) Ignition switch off Below 1 Ω
      H126-3 (FTLS) and H124-67 (FTLS) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      H126-5 (FCTL) and H124-66 (FCTL) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      H126-1 (FANB) and H124-69 (FANB) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      H126-6 (FANG) and H124-23 (FANG) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. Reconnect the electric vehicle charger assembly connector.
    6. Reconnect the charger cooling blower connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK ELECTRIC VEHICLE CHARGER ASSEMBLY (CHECK VOLTAGE) 

    Pre-procedure1

    1. Disconnect the H126 charger cooling blower connector.
    2. Perform the "Activate the Charger Cooling Fan" Active Test.

      Powertrain > Plug-in Control > Active Test 

      Tester Display
      Activate the Charger Cooling Fan

      Procedure1

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H126-1 (FANB) - H126-6 (FANG) Cooling fan operating 11 to 14 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. Turn the ignition switch off.
    5. Reconnect the charger cooling blower connector.

    Result: 

    OK 

    REPLACE CHARGER COOLING BLOWER. Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPLACE ELECTRIC VEHICLE CHARGER ASSEMBLY. Refer to  REMOVAL [08/2023 - ] 

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