| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| U011187 | Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message | Communication stops between the hybrid vehicle control ECU and the battery ECU assembly. | ·
CAN main/branch bus lines or connector ·
Hybrid vehicle control ECU ·
Battery ECU assembly ·
No. 3 CAN junction connector |
DTC Output from
·
Hybrid vehicle control ECU |
| U01BD87 | Lost Communication with DC/DC Converter Control Module "C" Missing Message | Communication stops between the hybrid vehicle control ECU and the inverter with converter assembly. | ·
CAN main/branch bus lines or connector ·
Hybrid vehicle control ECU ·
Inverter with converter assembly ·
No. 3 CAN junction connector |
DTC Output from
·
Hybrid vehicle control ECU |
| U115087 | Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message | Communication stops between the battery ECU assembly and the hybrid vehicle control ECU. | ·
CAN main/branch bus lines or connector ·
Battery ECU assembly ·
Hybrid vehicle control ECU ·
No. 3 CAN junction connector |
DTC Output from
·
Battery ECU assembly |
| U117B87 | Lost Communication with Hybrid/EV Battery Energy Control Module "A" (ch2) Missing Message | Communication stops between the hybrid vehicle control ECU and the battery ECU assembly. | ·
CAN main/branch bus lines or connector ·
Hybrid vehicle control ECU ·
Battery ECU assembly ·
No. 3 CAN junction connector |
DTC Output from
·
Hybrid vehicle control ECU |
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
Inspecting the high-voltage system
Disconnecting the low voltage connector of the inverter with converter assembly
Disconnecting the low voltage connector of the HV battery
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
| *a | Without waiting for 10 minutes |
After removing 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.
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 10 minute or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
When disconnecting and reconnecting the auxiliary battery.
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Some parts must be initialized and set when replacing or removing and installing parts.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
Check for DTCs.
| Result | Proceed to |
|---|---|
| Only DTC U01BD87 is output | A |
| DTC U011187, P01BD87, P115087 and/or P117B87 are output | B |
A
B
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the inverter with converter assembly connector.
| *a | Front view of wire harness connector
(to Inverter with Converter Assembly) |
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A193-5 (CNH) - A193-4 (CNL) | Cable disconnected from negative (-) auxiliary battery terminal | 54 to 69 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Reconnect the cable to the negative (-) auxiliary battery terminal.
| *a | Front view of wire harness connector
(to Inverter with Converter Assembly) |
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| A193-3 (IGCT) - Body ground | Ignition switch ON | Same as auxiliary battery voltage |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
| *1 | AMD Terminal (Inverter with Converter Assembly Side) |
| *2 | AMD Terminal (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side) |
| *a | D1-1 (AMD) |
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| D1-1 (AMD) - Body ground | Ignition switch off | Same as auxiliary battery voltage |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the cable from the negative (-) auxiliary battery terminal.
Measure the resistance according to the value(s) in the table below.
| *a | Component with harness connected
(Hybrid Vehicle Control ECU) |
- | - |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I278-9 (CA4H) - I278-22 (CA4L) | Cable disconnected from negative (-) auxiliary battery terminal | Below 70 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Component with harness connected
(Hybrid Vehicle Control ECU) |
- | - |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I278-9 (CA4H) - I278-22 (CA4L) | Cable disconnected from negative (-) auxiliary battery terminal | 54 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Component with harness connected
(Hybrid Vehicle Control ECU) |
- | - |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I278-9 (CA4H) - I278-13 (BATT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| I278-22 (CA4L) - I278-13 (BATT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Component with harness connected
(Hybrid Vehicle Control ECU) |
- | - |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I278-9 (CA4H) - A197-24 (E12) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| I278-22 (CA4L) - A197-24 (E12) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the No. 2 global CAN junction connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-16 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-17 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-18 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the I278 hybrid vehicle control ECU connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-16 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the A193 inverter with converter assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-17 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the O217 battery ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| A184-18 (CANL) - I26-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the No. 2 global CAN junction connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-16 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-17 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-18 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the I278 hybrid vehicle control ECU connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-16 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the A193 inverter with converter assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-17 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the O217 battery ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| A184-18 (CANL) - I26-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the No. 2 global CAN junction connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - A184-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - A184-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - A184-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the I278 hybrid vehicle control ECU connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - A184-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the A193 inverter with converter assembly connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Inverter with Converter Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-6 (CANH) - A184-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Disconnect the O211 battery ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - A184-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the hybrid vehicle control ECU connector.
| *a | Front view of wire harness connector
(to Hybrid Vehicle Control ECU) |
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I278-9 (CA4H) - I278-22 (CA4L) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Reconnect the I278 hybrid vehicle control ECU connector.
Disconnect the No. 2 global CAN junction connector.
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Hybrid Vehicle Control ECU |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-5 (CANH) - A184-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Measure the resistance according to the value(s) in the table below.
| *a | Front view of wire harness connector
(to No. 2 Global CAN Junction Connector) |
*b | to Battery ECU Assembly |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A184-7 (CANH) - A184-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Be sure to wear insulated gloves.
Check that the service plug grip is not installed.
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
Reconnect the A184 No. 2 global CAN junction connector.
Disconnect the battery ECU assembly connector.
| *a | Front view of wire harness connector
(to Battery ECU Assembly) |
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O217-22 (CA1H) - O217-21 (CA1L) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
| Proceed to |
|---|
| OK |
| NG |
OK
NG