DTC U0110-194: Lost Communication with Drive Motor Control Module "A"; DTC U0110-197: Lost Communication with Drive Motor Control Module "A"; DTC U0110-199: Lost Communication with Drive Motor Control Module "A"; DTC U0110-230: Lost Communication with Drive Motor Control Module "A" [12/2014 - ]: Procedure

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (IG) and wait for 2 minutes or more.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   U0110-194, 197, 199, 230 is output.	A
   U0110-194, 197, 199, 230 is not output.	B

5. Turn the ignition 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 hybrid vehicle control ECU terminals specified in the following table.
2. Turn the ignition switch to ON (IG).
3. Measure the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Tester Connection	CH1: A39-24 (HTM+) - G57-6 (E1) CH2: A39-25 (HTM-) - G57-6 (E1)
   Equipment Setting	1V/DIV., 200μs/DIV.
   Condition	Ignition 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 (Hybrid Vehicle 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 ignition 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 ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

2. Disconnect connector A39 from the hybrid vehicle control ECU.
3. Disconnect connector A47 from the inverter with converter assembly.
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the ignition switch to ON (IG).
6. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A39-24 (HTM+) - Body ground	Ignition switch ON (IG)	Below 1 V
   A39-25 (HTM-) - Body ground	Ignition switch ON (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

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

   NOTE:

   Turning the ignition switch to ON (IG) with the connector of the hybrid vehicle 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.

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

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A39-24 (HTM+) - A47-8 (HTM+)	Ignition switch off	Below 1 Ω
   A39-25 (HTM-) - A47-18 (HTM-)	Ignition switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A39-24 (HTM+) or A47-8 (HTM+) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
   A39-25 (HTM-) or A47-18 (HTM-) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

9. Disconnect the cable from the negative (-) auxiliary battery terminal.
10. Connect the inverter with converter assembly connector.
11. Connect the hybrid vehicle control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect connector A39 from the hybrid vehicle control ECU.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A39-24 (HTM+) - A39-25 (HTM-)	Ignition switch off	80 to 170 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

3. Connect the hybrid vehicle 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