Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC
Check DTC of the CAN gateway with CONSULT.

Is U1010 or B2600 indicated?

YES

Perform a diagnosis of the indicated DTC.

NO

GO TO 2.
CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the CAN gateway for damage, bend and loose connection (unit side and connector side).
Is the inspection result normal?

YES

GO TO 3.

NO

Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of CAN gateway.

Check the resistance between the CAN gateway harness connector terminals.

CAN gateway harness connector			Resistance (Ohm)
Connector No.	Terminal No.
M5	1	7	Approx. 54 - 66

Is the measurement value within the specification?

YES

GO TO 4.

Repair the CAN gateway branch line (CAN communication circuit 1 side).

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the CAN gateway. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

Replace the CAN gateway. Refer to Removal and Installation .

YES

Error was detected in the CAN gateway branch line (CAN communication circuit 1 side).

NO

Repair the power supply and the ground circuit.