Check Bus 3 Line for Short to +B [10/2022 - ]: Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the No. 5 CAN junction connector.
*a Front view of wire harness connector
(to No. 5 CAN Junction Connector)*b to Bus Buffer ECU (w/ Bus Buffer ECU) *c to Central Gateway ECU (Network Gateway ECU) *d to DCM (Telephone Transceiver Assembly) (w/ Telematics System) *e to Central Gateway ECU (Network Gateway ECU) *f to Radio and Display Receiver Assembly (for Radio and Display Type) *g Front view of DLC3 - - - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Connected to G105-1 (CANH) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Bus buffer ECU*1 G105-12 (CANH) - G114-16 (BAT) G105-2 (CANH) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Central gateway ECU (network gateway ECU) G105-13 (CANL) - G114-16 (BAT) G105-3 (CANH) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher DCM (telephone transceiver assembly)*3 G105-14 (CANL) - G114-16 (BAT) G105-4 (CANH) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Central gateway ECU (network gateway ECU) G105-15 (CANL) - G114-16 (BAT) G105-5 (CANH) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Radio and display receiver assembly*2 G105-16 (CANL) - G114-16 (BAT) *1: w/ Bus Buffer ECU
*2: for Radio and Display Type
*3: w/ Telematics System
Result
Result Proceed to OK A NG (Central gateway ECU [network gateway ECU] CAN main wire) B NG (Wire to ECU or sensor) C
Result:
A
REPLACE NO. 5 CAN JUNCTION CONNECTOR
Result:
C
See step 3
Result:
B
See step 2
- CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)
- Reconnect the G105 No. 5 CAN junction connector.
- Disconnect the central gateway ECU (network gateway ECU) connector.
*a Front view of wire harness connector
(to Central Gateway ECU [Network Gateway ECU])*b Front view of DLC3 - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G72-6 (CA3H) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher G72-21 (CA3L) - G114-16 (BAT) Result
Proceed to OK NG
Result:
OK
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]
Result:
NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)
- CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECU, SENSOR)
- Reconnect all wire harness connectors.
- Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus wire shorted to +B is connected.
Refer to TERMINALS OF ECU [10/2022 - 10/2023] , or refer to TERMINALS OF ECU [10/2023 - ]
*a Component with harness connected
(Central Gateway ECU [Network Gateway ECU])*b Front view of DLC3 - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G72-6 (CA3H) - G114-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher G72-21 (CA3L) - G114-16 (BAT) HINT:
- If the resistance changes to 6 kΩ or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
- If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short to +B in the wire harness and repair or replace the wire harness or connector if necessary.
Result
Proceed to OK NG
Result:
OK
REPLACE ECU OR SENSOR
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR