DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom | Trouble Area |
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Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. |
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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:
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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.
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HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN MAIN 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 Central Gateway ECU (Network Gateway ECU) |
*c | to No. 6 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A68-4 (CANH) - A68-14 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Central gateway ECU (network gateway ECU) |
A68-6 (CANH) - A68-16 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 6 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 6 CAN junction connector) | C |
A | REPLACE NO. 1 CAN JUNCTION CONNECTOR |
C | GO TO STEP 3 |
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2. | CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Reconnect the A68 No. 1 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:
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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. 1 CAN JUNCTION CONNECTOR) |
3. | CHECK FOR OPEN IN CAN MAIN 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 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 |
N98-5 (CANH) - N98-15 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 1 CAN junction connector |
Result | Proceed to |
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OK | A |
NG (Line to No. 1 CAN junction connector) | B |
NG (Line to No. 1 CAN junction terminal) | C |
A | REPLACE NO. 6 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
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4. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION TERMINAL) |
(a) Reconnect the N98 No. 6 CAN junction connector.
(b) Disconnect the N105 No. 1 CAN junction terminal connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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OK | REPLACE NO. 1 CAN JUNCTION TERMINAL |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 6 CAN JUNCTION CONNECTOR) |