- Short to +B in CAN main bus wire
- Short to +B in CAN branch wire
- Central gateway ECU (network gateway ECU)
- ECM
- Hybrid vehicle control ECU assembly
- Inverter with converter assembly
- Brake booster with master cylinder assembly (skid control ECU)
- Vehicle approaching speaker controller*1
- Battery ECU assembly*2
- No. 3 CAN junction connector
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001P5CD |
| Model Year Start: 2020 | Model: RAV4 HV | Prod Date Range: [06/2020 - 08/2020] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 2 Line for Short to +B; 2020 MY RAV4 HV [06/2020 - 08/2020] | ||
|
Check Bus 2 Line for Short to +B |
DESCRIPTION
There may be a short circuit between one of the CAN bus wires and +B when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
|
Symptom |
Trouble Area |
|---|---|
|
*1: w/ Vehicle Proximity Notification System
*2: for LITHIUM-ION BATTERY |
|
|
There is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
-
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.
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![2019 - 2024 MY RAV4 HV [02/2019 - ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- 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 1 minute or more before measuring the resistance.
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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-
Some parts must be initialized and set when replacing or removing and installing parts.
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- 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.
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HINT:
- 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.
PROCEDURE
|
1. |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the No. 3 CAN junction connector.
|
*a |
Front view of wire harness connector (to No. 3 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
|
*c |
to Inverter with Converter Assembly (for AWD) |
*d |
to ECM |
|
*e |
to Inverter with Converter Assembly |
*f |
to Hybrid Vehicle Control ECU Assembly |
|
*g |
to Brake Booster with Master Cylinder Assembly (Skid Control ECU) |
*h |
to Vehicle Approaching Speaker Controller (w/ Vehicle Proximity Notification System) |
|
*i |
to Battery ECU Assembly (for LITHIUM-ION BATTERY) |
*j |
Front view of DLC3 |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connected to |
|---|---|---|---|
|
*1: for AWD
*2: w/ Vehicle Proximity Notification System *3: for LITHIUM-ION BATTERY |
|||
|
G103-1 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
|
G103-11 (CANL) - G114-16 (BAT) |
|||
|
G103-2 (CANH) - G114-16 (BAT)*1 |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Inverter with converter assembly |
|
G103-12 (CANL) - G114-16 (BAT)*1 |
|||
|
G103-3 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
ECM |
|
G103-13 (CANL) - G114-16 (BAT) |
|||
|
G103-4 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Inverter with converter assembly |
|
G103-14 (CANL) - G114-16 (BAT) |
|||
|
G103-5 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Hybrid vehicle control ECU assembly |
|
G103-15 (CANL) - G114-16 (BAT) |
|||
|
G103-7 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Brake booster with master cylinder assembly (skid control ECU) |
|
G103-17 (CANL) - G114-16 (BAT) |
|||
|
G103-8 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Vehicle approaching speaker controller*2 |
|
G103-18 (CANL) - G114-16 (BAT) |
|||
|
G103-10 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Battery ECU assembly*3 |
|
G103-20 (CANL) - G114-16 (BAT) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Central gateway ECU [network gateway ECU] CAN main wire) |
B |
|
NG (Wire to ECU or sensor) |
C |
| A |
|
REPLACE NO. 3 CAN JUNCTION CONNECTOR |
| C |
|
|
|
2. |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 3 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G103 No. 3 CAN junction connector.
|
(b) Disconnect the central gateway ECU (network gateway ECU) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G72-18 (CA4H) - G114-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
G72-17 (CA4L) - G114-16 (BAT) |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 3 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECU OR SENSOR) |
(a) Reconnect all wire harness connectors.
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B is connected.
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|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
HINT:
|
|
| OK |
|
REPLACE ECU OR SENSOR |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|