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   7 

A: Go to next step 

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 A58 from the hybrid vehicle control ECU.
3. Disconnect connector the low voltage A59 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 1: Identifying A58 From The Hybrid Vehicle Control ECU & A59 From The Inverter With Converter Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A58-110 (CLK+) - Body ground	Power switch on (IG)	Below 1 V
   A58-109 (CLK-) - Body ground	Power switch on (IG)	Below 1 V
   A58-112 (REQ+) - Body ground	Power switch on (IG)	Below 1 V
   A58-111 (REQ-) - Body ground	Power switch on (IG)	Below 1 V
   A58-92 (HTM+) - Body ground	Power switch on (IG)	Below 1 V
   A58-91 (HTM-) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)
   *2	Front view of wire harness connector (to Inverter with Converter Assembly)

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector 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
   A58-110 (CLK+) - A59-28 (CLK+)	Power switch off	Below 1 Ω
   A58-109 (CLK-) - A59-19 (CLK-)	Power switch off	Below 1 Ω
   A58-112 (REQ+) - A59-25 (REQ+)	Power switch off	Below 1 Ω
   A58-111 (REQ-) - A59-16 (REQ-)	Power switch off	Below 1 Ω
   A58-92 (HTM+) - A59-26 (HTM+)	Power switch off	Below 1 Ω
   A58-91 (HTM-) - A59-17 (HTM-)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A58-110 (CLK+) or A59-28 (CLK+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A58-109 (CLK-) or A59-19 (CLK-) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A58-112 (REQ+) or A59-25 (REQ+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A58-111 (REQ-) or A59-16 (REQ-) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A58-92 (HTM+) or A59-26 (HTM+) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A58-91 (HTM-) or A59-17 (HTM-) - Body ground and other terminals	Power switch off	10 kΩ or higher

8. Connect the inverter with converter assembly connector.
9. Connect the hybrid vehicle control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the low voltage connector A59 from the inverter with converter assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Low Voltage Connector A59 From The Inverter With Converter Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A59-28 (CLK+) - A59-19 (CLK-)	Power switch off	109 to 139 Ω
   A59-25 (REQ+) - A59-16 (REQ-)	Power switch off	109 to 139 Ω
   A59-26 (HTM+) - A59-17 (HTM-)	Power switch off	109 to 139 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Inverter with Converter Assembly)

3. Connect the inverter with converter assembly connector.

NG → See step   8 

OK: Go to next step 

1. Disconnect connector A58 from the hybrid vehicle control ECU.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying A58 From The Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A58-110 (CLK+) - A58-109 (CLK-)	Power switch off	109 to 139 Ω
   A58-112 (REQ+) - A58-111 (REQ-)	Power switch off	109 to 139 Ω
   A58-92 (HTM+) - A58-91 (HTM-)	Power switch off	109 to 139 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)

3. Connect the hybrid vehicle control ECU connector.

NG → See step   9 

OK: Go to next step 

NG → See step   8 

OK → See step   9