DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom | Trouble Area |
---|---|
Resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. |
|
This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.
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 OPEN IN CAN MAIN BUS LINES (NO. 7 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the N99 No. 7 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. 7 CAN Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
*c | to No. 4 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N99-3 (CANH) - N99-9 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Central gateway ECU (network gateway ECU) |
N99-4 (CANH) - N99-10 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 4 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 4 CAN junction connector) | C |
A | REPLACE NO. 7 CAN JUNCTION CONNECTOR |
C | GO TO STEP 3 |
|
2. | CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Reconnect the N99 No. 7 CAN junction connector.
(b) Disconnect the G66 central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 7 CAN JUNCTION CONNECTOR) |
3. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N99 No. 7 CAN junction connector.
(b) Disconnect the G99 No. 4 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. 4 CAN Junction Connector) | *b | to No. 7 CAN Junction Connector |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G99-6 (CANH) - G99-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR) |
|
4. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G99 No. 4 CAN junction connector.
(b) Disconnect the G98 No. 4 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. 4 CAN Junction Connector) | *b | to No. 2 CAN Junction Connector |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G98-6 (CANH) - G98-17 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω |
OK | REPLACE NO. 4 CAN JUNCTION CONNECTOR |
|
5. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G98 No. 4 CAN junction connector.
(b) Disconnect the A69 No. 2 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. 2 CAN Junction Connector) | *b | to Airbag ECU Assembly |
*c | to No. 4 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A69-2 (CANH) - A69-12 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Airbag ECU assembly |
A69-5 (CANH) - A69-15 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 4 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (Line to airbag ECU assembly) | B |
NG (Line to No. 4 CAN junction connector) | C |
A | REPLACE NO. 2 CAN JUNCTION CONNECTOR |
C | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) |
|
6. | CHECK FOR OPEN IN CAN MAIN BUS LINES (AIRBAG ECU ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR) |
(a) Reconnect the A69 No. 2 CAN junction connector.
(b) Disconnect the G64 airbag ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | REPLACE AIRBAG ECU ASSEMBLY |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG ECU ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR) |