Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Open in Bus 3 Main Bus Line [11/2015 - ]: Procedure
- CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR)
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the F72 No. 4 CAN junction connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
(F72)
(F72)
Tester Connection Condition Specified Condition Connected to F72-3 (CANH) - F72-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU) F72-4 (CANH) - F72-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU) Result
Result OK NG
Result:
OK
REPLACE NO. 4 CAN JUNCTION CONNECTOR
Result:
NG
See step 2
- CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 4 CAN JUNCTION CONNECTOR)
- Reconnect the F72 No. 4 CAN junction connector.
- Disconnect the F59 central gateway ECU (network gateway ECU) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
(F59)
(F59)
Tester Connection Condition Specified Condition F59-6 (CA3H) - F59-19 (CAYH) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω F59-21 (CA3L) - F59-20 (CAYL) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω Result
Result OK NG
Result:
OK
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2015 - 08/2019] , or refer to REMOVAL [08/2019 - 07/2020] , or refer to REMOVAL [07/2020 - ]
Result:
NG
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 4 CAN JUNCTION CONNECTOR)
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.