Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

The output voltage of the generator is controlled by the IC regulator at terminal "S" detecting the input voltage. Terminal "S" circuit detects the battery voltage to adjust the generator output voltage with the IC regulator.

CHECK TERMINAL "S" CONNECTION
1.Turn ignition switch OFF

2.Check if terminal "S" is clean and tight.

Is the inspection result normal?

YES

GO TO 2 .

NO

Repair terminal "S" connection. Confirm repair by performing system test using DSS-5000P NI. Refer to the applicable Instruction Manual for proper testing procedures.

CHECK VOLTAGE REGULATOR CIRCUIT

Check voltage between generator harness connector and ground.

(+)

(-)

Voltage

(Approx.)

Connector

Terminal

F205 (with Cummins 5.0L)

F242 (with VK56VD)

Ground

Battery voltage

Does battery voltage exist?

YES

Refer to Work Flow (With DSS-5000P NI) (with Cummins 5.0L) , Work Flow (With DSS-5000P NI) (with VK56VD) , Work Flow (Without DSS-5000P NI) (with Cummins 5.0L) or Work Flow (Without DSS-5000P NI) (with VK56VD) .

Check harness for open between generator and fuse.