DTC    P3108-535    A/C Amplifier Communication Circuit Malfunction

DTC    P3108-536    A/C Amplifier Communication Circuit Malfunction

DTC    P3108-538    A/C Amplifier Communication Circuit Malfunction

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DESCRIPTION

The HV control ECU detects a wiring malfunction in the serial communication line of the w/ motor compressor assembly.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
P3108
535
Serial communication malfunction
  1. Wire harness or connector
  2. w/ motor compressor assembly
↑
536
A/C inverter malfunction
  1. Wire harness or connector
  2. w/ motor compressor assembly
↑
538
Open in STB signal circuit
  1. Wire harness or connector
  2. w/ motor compressor assembly

WIRING DIAGRAM


A113957E01


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - W/ MOTOR COMPRESSOR ASSEMBLY)


    A108019E02

  1. Disconnect the H33 connector from the HV control ECU.

  1. Disconnect the C18 w/ motor compressor assembly connector.

  1. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

    Standard Voltage:
    Tester Connection
    		Specified Condition
    CLK (H33-14) - Body ground
    		Below 1 V
    ITE (H33-15) - Body ground
    		Below 1 V
    ETI (H33-16) - Body ground
    		Below 1 V
    STB (H33-18) - Body ground
    		Below 1 V

  1. Turn the ignition switch off.

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

    Standard Resistance (Check for open):
    Tester Connection
    HV Control ECU - w/ motor compressor assembly
    		Specified Condition
    CLK (H33-14) - CLK (C18-1)
    		Below 1 Ω
    ITE (H33-15) - DIN (C18-2)
    		Below 1 Ω
    ETI (H33-16) - DOUT (H18-3)
    		Below 1 Ω
    STB (H33-18) - STB (H18-4)
    		Below 1 Ω

    Standard Resistance (Check for short):
    Tester Connection
    HV Control ECU or w/ motor compressor assembly - Body ground
    		Specified Condition
    CLK (H33-14) - CLK (C18-1) - Body ground
    		10 kΩ or higher
    ITE (H33-15) - DIN (C18-2) - Body ground
    		10 kΩ or higher
    ETI (H33-16) - DOUT (H18-3) - Body ground
    		10 kΩ or higher
    STB (H33-18) - STB (H18-4) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE W/ MOTOR COMPRESSOR ASSEMBLY