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Home >> Lexus >> 2023 >> RX 500h >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes (3 Of 3) & Circuit Tests (1 Of 7) >> CAN COMMUNICATION SYSTEM (except Gasoline Model) >> Shift Control ECU Communication Stop Mode [08/2023 - ] >> Procedure

Shift Control ECU Communication Stop Mode [08/2023 - ]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (TRANSMISSION FLOOR SHIFT ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the C35 transmission floor shift assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C35-15 (CA1H) - C35-16 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TRANSMISSION FLOOR SHIFT ASSEMBLY) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C35-23 (E12) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      C35-9 (E1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      C35-1 (IGP) - Body ground Ignition switch ON 11 to 14 V
      C35-2 (BATT) - Body ground Ignition switch off 11 to 14 V
      C35-3 (IGCT) - Body ground*1 Ignition switch ON 11 to 14 V
      C35-3 (IGS) - Body ground*2 Ignition switch ON 11 to 14 V
      • *1: for HEV, 1Motor-HEV Model
      • *2: for PHEV Model

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)