U0110-160 - Lost Communication with Driver Motor Control Module
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: U0110-160: Lost Communication with Driver Motor Control Module
U0110-160 - Lost Communication with Driver Motor Control Module
DESCRIPTION
Refer to the wiring diagram for DTC U0110-159 U0110.
WIRING DIAGRAM
Refer to the description for DTC U0110-159 U0110.
INSPECTION PROCEDURE
CAUTION:
* Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
* After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
NOTICE:
If DTC U0110-160 was set due to incomplete engagement of the connectors, and if the system returns to normal when the power switch is turned on (IG) after clearing the DTCs, DTC P0A1B-788 (power source IC reset) will be set. Proceed to troubleshooting without considering DTC P0A1B-788.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
1. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)
(a) Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.
Result:
HINT
The shape of the waveform may vary according to communication conditions.
B -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
A -- Continue to next step.
2. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)
(a) Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.
Result:
HINT
* The shape of the waveform may vary according to communication conditions.
* Confirm that the oscilloscope being used is able to correctly display the waveform of CLK+ and CLK-.
B -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
A -- Continue to next step.
3. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)
(a) Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.
Result:
HINT
The shape of the waveform may vary according to communication conditions.
B -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
A -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
CAUTION:
Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip Hybrid Control System.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.
(c) Disconnect connector A76 from the hybrid vehicle control ECU.
(d) Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).
(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTICE:
Turning the power switch 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.
(g) Turn the power switch off.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK INVERTER WITH CONVERTER ASSEMBLY
(a) Turn the power switch off.
(b) Connect the low voltage connector of the inverter with converter assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components
6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
CAUTION:
Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip Hybrid Control System.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.
(c) Disconnect connector A76 from the hybrid vehicle control ECU.
(d) Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).
(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTICE:
Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU or the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(g) Turn the power switch off.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK INVERTER WITH CONVERTER ASSEMBLY
(a) Turn the power switch off.
(b) Connect the low voltage connector of the inverter with converter assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components
8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
CAUTION:
Be sure to wear insulated gloves.
(a) Turn the power switch off.
(b) Remove the service plug grip Hybrid Control System.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.
(c) Disconnect connector A76 from the hybrid vehicle control ECU.
(d) Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).
(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTICE:
Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU or the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(g) Turn the power switch off.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK INVERTER WITH CONVERTER ASSEMBLY
(a) Turn the power switch off.
(b) Connect the low voltage connector of the inverter with converter assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Installation
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components