DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom | Trouble Area |
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Resistance between terminals 15 (CA5H) and 16 (CA5L) 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 JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the N97 No. 1 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 Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
*c | to No. 8 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N97-8 (CANH) - N97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Central gateway ECU (network gateway ECU) |
N97-11 (CANH) - N97-22 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 8 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 8 CAN junction connector) | C |
A | REPLACE NO. 1 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 N97 No. 1 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 JUNCTION CONNECTOR) |
3. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 8 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N97 No. 1 junction connector.
(b) Disconnect the N101 No. 8 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. 8 CAN Junction Connector) | *b | to No. 5 CAN Junction Connector |
*c | to No. 1 Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N101-3 (CANH) - N101-9 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 5 CAN junction connector |
N101-4 (CANH) - N101-10 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 1 junction connector |
Result | Proceed to |
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OK | A |
NG (Line to No. 1 junction connector) | B |
NG (Line to No. 5 CAN junction connector) | C |
A | REPLACE NO. 8 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
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4. | CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N101 No. 8 CAN junction connector.
(b) Disconnect the G97 No. 5 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. 5 CAN Junction Connector) | *b | to No. 8 CAN Junction Connector |
*c | to Combination Meter Assembly | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
G97-7 (CANH) - G97-18 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | No. 8 CAN junction connector |
G97-8 (CANH) - G97-19 (CANL) | Cable disconnected from negative (-) auxiliary battery terminal | 108 to 132 Ω | Combination meter assembly |
Result | Proceed to |
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OK | A |
NG (Line to No. 8 CAN junction connector) | B |
NG (Line to combination meter assembly) | C |
A | REPLACE NO. 5 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 8 CAN JUNCTION CONNECTOR) |
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5. | CHECK FOR OPEN IN CAN MAIN BUS LINES (COMBINATION METER ASSEMBLY) |
(a) Reconnect the G97 No. 5 CAN junction connector.
(b) Disconnect the G17 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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OK | REPLACE COMBINATION METER ASSEMBLY |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 5 CAN JUNCTION CONNECTOR) |