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: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   DTC No.	Relevant Diagnosis
   P0ADB-227, P0ADC-226	SMRB circuit
   P0ADF-229, P0AE0-228	SMRG circuit

   HINT: 

   • Turning the power switch on (IG) with the service plug grip and inverter cover removed causes interlock switch system DTC P0A0D-350 to be output.
   • P3108-535, P3108-536 or P3108-538 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

YES → GO TO  DIAGNOSTIC TROUBLE CODE CHART  DTC CHART 

NO: Go to next step 

1. Disconnect the C64 hybrid vehicle control ECU connector.
   Fig 1: Identifying Connector Terminal Identification of Hybrid Vehicle Control ECU Compressor With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the C63 compressor with motor assembly connector.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   CLK (C64-18) - Body ground	Below 1 V
   ITE (C64-20) - Body ground	Below 1 V
   ETI (C64-19) - Body ground	Below 1 V
   STB (C64-33) - Body ground	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Turn the power switch off.
6. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   CLK (C64-18) - CLK (C63-1)	Below 1 Ω
   ITE (C64-20) - DIN (C63-2)	Below 1 Ω
   ETI (C64-19) - DOUT (C63-3)	Below 1 Ω
   STB (C64-33) - STBI (C63-4)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   CLK (C64-18) or CLK (C63-1) - Body ground	10 kΩ or more
   ITE (C64-20) or DIN (C63-2) - Body ground	10 kΩ or more
   ETI (C64-19) or DOUT (C63-3) - Body ground	10 kΩ or more
   STB (C64-33) or STBI (C63-4) - Body ground	10 kΩ or more

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch off.
2. Connect the hybrid vehicle control ECU connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Connector Terminal Identification Of Compressor With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   DOUT (C63-3) - Body ground	10 kΩ or more
   STBI (C63-4) - Body ground	10 kΩ or more

4. Turn the power switch on (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   CLK (C63-1) - Body ground	10 to 14 V
   DIN (C63-2) - Body ground	10 to 14 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG → See step   8 

OK: Go to next step 

1. Turn the power switch off.
2. Connect the compressor with motor assembly connector.
3. Disconnect the C64 hybrid vehicle control ECU connector.
4. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying C64 Hybrid Vehicle Control ECU Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   CLK (C64-18) - Body ground	10 kΩ or more
   ITE (C64-20) - Body ground	10 kΩ or more

5. Turn the power switch on (IG).
6. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   ETI (C64-19) - Body ground	10 to 14 V
   STB (C64-33) - Body ground	10 to 14 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG → See step   9 

OK: Go to next step 

1. Replace the hybrid vehicle control ECU. Refer to REMOVAL .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Read and record the DTCs and freeze frame data.
4. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
5. Clear DTCs and freeze frame data.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (READY).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   DTC P3108-535 or 538 is output.

YES → See step   9 

NO → COMPLETED