Detailed Flow

WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be done as a set from start to finish.

DIAGNOSIS WITH MULTI-TASKING BATTERY AND ELECTRICAL DIAGNOSTIC STATION GR8-1200 NI

Perform the starting system test with Multi-tasking battery and electrical diagnostic station GR8-1200 NI. For details and operating instructions, refer to diagnostic station Instruction Manual.

Test result

CRANKING NORMAL

GO TO STEP 2 .

LOW VOLTAGE

GO TO STEP 5 .

CHARGE BATTERY

Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12 hours.) Perform battery test again. Refer to diagnostic station instruction manual.

REPLACE BATTERY

Before replacing battery, clean the battery cable clamps and battery posts. Perform battery test again. Refer to diagnostic station instruction manual. If second test result is "REPLACE BATTERY", then do so. Perform battery test again to confirm repair.

CRANKING CHECK

Check that the starter motor operates correctly.

Does the engine crank normally?

YES

GO TO STEP 3 .

NO

GO TO STEP 4 .

ENGINE START CHECK

Check that the engine starts.

Does the engine start?

YES

Starter motor is OK. INSPECTION END

NO

Perform further diagnosis of engine mechanical or engine control system. Refer ENGINE MECHANICAL or ACCELERATOR CONTROL SYSTEM . Once resolved, perform battery test again.

STARTER MOTOR ACTIVATION

Check that the starter motor operates.

Does the starter motor turn?

YES

Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.

NO

GO TO STEP 7 .

COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE

Compare the engine coolant temperature and the cranking voltage with the specifications.

MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERATURE

Engine coolant temperature [°C (°F)]	Voltage [V]
- 30 to - 20 (- 22 to - 4)	8.6
- 19 to - 10 (- 2 to 14)	9.1
- 9 to 0 (16 to 32)	9.5
More than 1 (More than 34)	9.9

Is the voltage less than the specified value?

YES

GO TO STEP 7 .

GO TO STEP 6 .

STARTER OPERATION

Check the starter operation status.

Does the starter motor turn smoothly?

YES

Starter motor is OK. INSPECTION END

NO

GO TO STEP 7 .

"B" TERMINAL CIRCUIT INSPECTION

Check "B" terminal circuit. Refer to DIAGNOSIS PROCEDURE .

Is "B" terminal circuit normal?

YES

GO TO STEP 8 .

NO

Repair as needed.

"S" CONNECTOR CIRCUIT INSPECTION

Check "S" connector circuit. Refer to DIAGNOSIS PROCEDURE .

Is "S" connector circuit normal?

YES

GO TO STEP 9 .

NO

Repair as needed.

ENGINE ROTATION STATUS

Check that the engine can be rotated by hand.

Does the engine turn freely by hand?

YES

Replace starter motor. Refer to REMOVAL AND INSTALLATION .

NO

Perform further diagnosis of engine mechanical or powertrain mechanism. Once resolved, perform battery test again using Multi-tasking battery and electrical diagnostic station GR8-1200 NI. Refer to the diagnostic station Instruction Manual for proper testing procedures.