DTC U0110-160: Lost Communication with Driver Motor Control Module: Procedure

NEXT: Go to next step 

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

   Result

   Result	Proceed to
   DTC U0110-160 is output.	A
   DTC U0110-160 is not output.	B

5. Turn the power switch off.

B → See step   22 

A: Go to next step 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

NG → See step   16 

OK: Go to next step 

NG → See step   18 

OK: Go to next step 

1. Connect an oscilloscope between the power management control ECU terminals specified in the following table.
2. Turn the power switch on (IG).
3. Measure the waveform.
   Fig 1: Identifying Power Management Control ECU (Check Waveform)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Tester Connection	CH1: A20-24 (HTM+) - H3-6 (E1) CH2: A20-25 (HTM-) - H3-6 (E1)
   Equipment Setting	1V/DIV., 200μs/DIV.
   Condition	Power switch on (IG)

   Result

   Result	Proceed to
   The waveform appears as shown in the illustration.	A
   The waveform differs from the one shown in the illustration.	B

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

   HINT: 

   • Inspect with the connector connected.
   • If pulses are generated, the shape of the waveform can be assumed to be normal.
   • The shape of the waveform may vary according to communication conditions.
4. Turn the power switch off.

B → See step   14 

A: Go to next step 

B → See step   10 

A: Go to next step 

B → See step   12 

A → See step   21 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   21 

OK → See step   20 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → See step   21 

OK → See step   20 

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

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair service information because this may cause a malfunction.

2. Disconnect connector A20 from the power management control ECU.
3. Disconnect connector A62 from the inverter with converter assembly.
4. Turn the power switch on (IG).
5. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying A62 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A20-24 (HTM+) - Body ground	Power switch on (IG)	Below 1 V
   A20-25 (HTM-) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)
   *b	Front view of wire harness connector (to Inverter with Converter Assembly)

   NOTE:

   Turning the power switch on (IG) with the connector of the power management control ECU and the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A20-24 (HTM+) - A62-8 (HTM+)	Power switch off	Below 1 Ω
   A20-25 (HTM-) - A62-18 (HTM-)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A20-24 (HTM+) or A62-8 (HTM+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A20-25 (HTM-) or A62-18 (HTM-) - Body ground and other terminals	Power switch off	10 kΩ or higher

8. Connect the inverter with converter assembly connector.
9. Connect the power management control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect connector A20 from the power management control ECU.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying A20 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A20-24 (HTM+) - A20-25 (HTM-)	Power switch off	80 to 170 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)

3. Connect the power management control ECU connector.

NG → See step   21 

OK → See step   20 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

NG → See step   23 

OK → See step   25 

B → REPLACE MALFUNCTIONING PARTS 

C → CONNECT SECURELY 

A: Go to next step 

NG → See step   24 

OK → See step   25