Nissan Armada 2025-2026 Service and Repair Manual: CONSULT/GST Data Link Connector (DLC) Circuit

Nissan Armada 2025-2026 Service and Repair Manual / General Information / Basic Inspection / Consult/gst Checking System / CONSULT/GST Data Link Connector (DLC) Circuit

INSPECTION PROCEDURE

If the CONSULT/GST cannot diagnose the system properly, check the following items.

Symptom	Check item
CONSULT/GST cannot access any system.	CONSULT/GST DLC power supply circuit (Terminal 8 and 16) and ground circuit (Terminal 4 and 5) Check the power supply and ground circuit of 8CH CAN gateway. Refer to Diagnosis Procedure. Check the data link connector branch line circuit. Refer to Diagnosis Procedure. Check the diagnostic CAN communication circuit. Refer to Diagnosis Procedure. If above inspection results are normal, replace 8CH CAN gateway. Refer to 8CH CAN GATEWAY : Removal & Installation.
CONSULT cannot access individual system. (Other systems can be accessed.)	Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring diagram for each system.) Open or short circuit between the system and CONSULT DLC (For detailed circuit, refer to wiring diagram for each system.) Open or short circuit CAN communication line. Refer to Trouble Diagnosis Flow Chart.

Symptom

Check item

CONSULT/GST cannot access any system.

CONSULT/GST DLC power supply circuit (Terminal 8 and 16) and ground circuit (Terminal 4 and 5)
Check the power supply and ground circuit of 8CH CAN gateway. Refer to Diagnosis Procedure.
Check the data link connector branch line circuit. Refer to Diagnosis Procedure.
Check the diagnostic CAN communication circuit. Refer to Diagnosis Procedure.
If above inspection results are normal, replace 8CH CAN gateway. Refer to 8CH CAN GATEWAY : Removal & Installation.

CONSULT cannot access individual system. (Other systems can be accessed.)

Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring diagram for each system.)
Open or short circuit between the system and CONSULT DLC (For detailed circuit, refer to wiring diagram for each system.)
Open or short circuit CAN communication line. Refer to Trouble Diagnosis Flow Chart.

NOTE:

The DDL1 and DDL2 circuits from DLC pins 12, 13, 14 and 15 may be connected to more than one system. A short in a DDL circuit connected to a control unit in one system may affect CONSULT access to other systems.

If the GST cannot operate properly, check the circuit based on the information of SAE J1962 and ISO 15031-3.

CONSULT Function and System Application1

FUNCTION Mode Function All DTC Reading Display all DTCs or diagnostic items that all ECUs are recording and judging. Work Support This mode enables a technician to adjust some devices faster and ...

Wiring Diagram - CONSULT/GST CHECKING SYSTEM -

CONSULT CHECKING SYSTEM (WITHOUT ProPILOT Assist 2.1) Click Link to Wiring Diagram. CONSULT CHECKING SYSTEM (WITH ProPILOT Assist 2.1) Click Link to Wiring Diagram. ...

Other materials:

Work Procedure (Group A)
*1: When the same malfunction is detected in two consecutive trips, MIL will illuminate. CHECK DTC Check DTC. Is any DTC detected? YES>> Repair malfunction(s) and erase DTC. NO>> GO TO 2 . CHECK PERMANENT DTC With CONSULT Ignition switch OFF and wait at least 10 seconds. Ignitio ...

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