Nissan Frontier D40. Manual - part 1018

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

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

1.

DIAGNOSIS WITH MULTITASKING BATTERY DIAGNOSTIC STATION

Perform the starting system test with multitasking battery diagnostic station. For details and operating instruc-
tions, refer to diagnostic station instruction manual.

Test result

CRANKING NORMAL>>GO TO 2
LOW VOLTAGE>>GO TO 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.

2.

CRANKING CHECK

Check that the starter motor operates properly.

Does the engine crank normally?

YES

>> GO TO 3

NO

>> GO TO 4

3.

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 to EM and EC

sections. Once resolved, perform battery test again.

4.

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 7

5.

COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE

Compare the engine coolant temperature and verify the cranking voltage is within specification.

Minimum Specification of Cranking Voltage Referencing Coolant Temperature

Is the voltage less than the specified value?

YES

>> GO TO 7

NO

>> GO TO 6

6.

STARTER OPERATION

Check the starter operation.

Does the starter motor turn smoothly?

YES

>> Starter motor is OK. Inspection End.

NO

>> GO TO 7

7.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to 

STR-13, "Diagnosis Procedure"

.

Is “B” terminal circuit normal?

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

DIAGNOSIS AND REPAIR WORKFLOW

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YES

>> GO TO 8

NO

>> Repair as needed.

8.

“S” CONNECTOR CIRCUIT INSPECTION

Check “S” connector circuit. Refer to 

STR-15, "QR25DE : Diagnosis Procedure"

 (QR25DE) or 

STR-16,

"VQ40DE : Diagnosis Procedure"

 (VQ40DE).

Is “S” connector circuit normal?

YES

>> GO TO 9

NO

>> Repair as needed.

9.

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 

STR-33, "Removal and Installation (QR25DE)"

 or 

STR-34,

"Removal and Installation (VQ40DE)"

.

NO

>> Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to EM or TM

sections. Once resolved, perform battery test again. Refer to diagnostic station instruction man-
ual. 

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< FUNCTION DIAGNOSIS >

STARTING SYSTEM

FUNCTION DIAGNOSIS

STARTING SYSTEM

A/T

A/T : System Diagram

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A/T : System Description

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The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The
starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates. 

A/T : Component Parts Location

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1.

A/T assembly F9 (with built in TCM 
F502)

2.

IPDM E/R E119, E120, E122, E124

3.

BCM M18 (view with lower instrument 
panel LH removed)

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