DESCRIPTION
There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
Symptom | Trouble Area |
---|---|
Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is below 54 Ω. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
Click here
Click here
DTC check procedure: Turn the power switch on (IG) 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.
Click here
HINT:
PROCEDURE
1. | CHECK FOR SHORT IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the A68 No. 1 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 1 CAN Junction Connector) | *b | to Millimeter Wave Radar Sensor Assembly |
*c | to Forward Recognition Camera | *d | to Central Gateway ECU (Network Gateway ECU) |
*e | to Swing Grille Actuator Assembly | *f | to No. 6 CAN Junction Connector |
*g | to Parking Assist ECU (w/ Panoramic View Monitor System) | *h | to Clearance Warning ECU Assembly (w/ Parking Support Alert System) |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A68-2 (CANH) - A68-12 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Millimeter wave radar sensor assembly |
A68-3 (CANH) - A68-13 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Forward recognition camera |
A68-4 (CANH) - A68-14 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Central gateway ECU (network gateway ECU) |
A68-5 (CANH) - A68-15 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Swing grille actuator assembly |
A68-6 (CANH) - A68-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 6 CAN junction connector |
A68-7 (CANH) - A68-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Parking assist ECU*1 |
A68-8 (CANH) - A68-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Clearance warning ECU assembly*2 |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 6 CAN junction connector) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 1 CAN JUNCTION CONNECTOR |
C | GO TO STEP 3 |
D | GO TO STEP 5 |
|
2. | CHECK FOR SHORT IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the G66 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 1 CAN Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A68-4 (CANH) - A68-14 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
OK | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. | CHECK FOR SHORT IN CAN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR) |
(a) Reconnect the A68 No. 1 CAN junction connector.
(b) Disconnect the N98 No. 6 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 6 CAN Junction Connector) | *b | to No. 1 CAN Junction Terminal |
*c | to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System) | *d | to Rear Television Camera Assembly |
*e | to No. 1 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N98-1 (CANH) - N98-11 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 1 CAN junction terminal |
N98-3 (CANH) - N98-13 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Blind spot monitor sensor RH* |
N98-4 (CANH) - N98-14 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Rear television camera assembly |
N98-5 (CANH) - N98-15 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 1 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (Line to No. 1 CAN junction terminal) | B |
NG (Line to No. 1 CAN junction connector) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 6 CAN JUNCTION CONNECTOR |
C | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
D | GO TO STEP 5 |
|
4. | CHECK FOR SHORT IN CAN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) |
(a) Disconnect the N105 No. 1 CAN junction terminal connector.
(b) Measure the resistance according to the value(s) in the table below.
*a | Front view of wire harness connector (to No. 6 CAN Junction Connector) | *b | to No. 1 CAN Junction Terminal |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
N98-1 (CANH) - N98-11 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 1 MΩ or higher |
OK | REPLACE NO. 1 CAN JUNCTION TERMINAL |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) |
5. | CHECK FOR SHORT IN CAN BUS LINES (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 short circuited branch line is connected.
Click here
(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 |