Detailed Flow
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 PROCEDURE CHART
| Step | Action | YES | NO |
|---|---|---|---|
| 1 | DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER Perform the starting system test with Starting/Charging System Tester (J-44373). For details and operating instructions, refer to Technical Service Bulletin. Test result |
GO TO 2 | GO TO 5 |
| 2 | CRANKING CHECK Check that the starter motor operates properly. Does the engine crank normally? |
GO TO 3 | GO TO 4 |
| 3 | ENGINE START CHECK Check that the engine starts. Does the engine start? |
Starter motor is OK. Inspection End. | Perform further diagnosis of engine mechanical or engine control system. Refer to section 1A and 1D. Once resolved, perform battery test again. |
| 4 | STARTER MOTOR ACTIVATION Check that the starter motor operates. Does the starter motor turn? |
Check ring gear and starter motor drive pinion. Once resolved, perform battery test again. | GO TO 7 |
| 5 | COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE Compare the engine coolant temperature and verify the cranking voltage is within specification. Is the voltage less than the specified value? |
GO TO 7 | GO TO 6 |
| 6 | STARTER OPERATION Check the starter operation. Does the starter motor turn smoothly? |
Starter motor is OK. Inspection End. | GO TO 7 |
| 7 | "B" TERMINAL CIRCUIT INSPECTION Check "B" terminal circuit. Refer to [B TERMINAL CIRCUIT CHECK ]. Is "B" terminal circuit normal? |
GO TO 8 | Repair as needed. |
| 8 | "S" CONNECTOR CIRCUIT INSPECTION Check "S" connector circuit. Refer to [S CONNECTOR CIRCUIT CHECK [QR25DE] ] (QR25DE) or [S CONNECTOR CIRCUIT CHECK [VQ40DE] ] (VQ40DE). Is "S" connector circuit normal? |
GO TO 9 | Repair as needed. |
| 9 | ENGINE ROTATION STATUS Check that the engine can be rotated by hand. Does the engine turn freely by hand? |
Replace starter motor. Refer to [STARTER MOTOR: REMOVAL AND INSTALLATION (QR25DE) ] or [STARTER MOTOR: REMOVAL AND INSTALLATION (VQ40DE) ]. | Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to section 1D, 5A or 5B. Once resolved, perform battery test again. Refer to Technical Service Bulletin. |