Diagnosis Procedure - Early Production

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 CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
  - Sonar control unit
  - CAN gateway (For Mexico without ICC system)
Is the inspection result normal?

YES

For Mexico without ICC system: GO TO 2.

YES

Except for Mexico without ICC system: GO TO 3.

NO

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the connector of CAN gateway.

Check the continuity between the CAN gateway harness connector terminals.

CAN gateway harness connector			Continuity
Connector No.	Terminal No.
M5	4	6	Existed
	10	12	Existed

Is the inspection result normal?

YES

GO TO 3.

Check the harness and repair the root cause (CAN communication circuit 2 side).

CHECK HARNESS FOR OPEN CIRCUIT

Connect the connector of CAN gateway. (For Mexico without ICC system)
Disconnect the connector of sonar control unit.

Check the resistance between the sonar control unit harness connector terminals.

Sonar control unit harness connector			Resistance (Ohm)
Connector No.	Terminal No.
M70	5	6	Approx. 54 - 66

Is the measurement value within the specification?

YES

GO TO 4.

Replace the main harness.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the sonar control unit. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

Replace the sonar control unit. Refer to Removal and Installation .

YES

Error was detected in the sonar control unit branch line.

NO

Repair the power supply and the ground circuit.