Starting System: Testing and Inspection

STARTING SYSTEM


Trouble Diagnosis with Multitasking Battery Diagnostic Station

Refer to diagnostic station instruction manual.

WORK FLOW






DIAGNOSTIC PROCEDURE 1

Check Starter Motor Circuit
1.CHECK POWER SUPPLY TO STARTER MOTOR
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition switch OFF.
4. Check that the starter motor connector F27 connection is clean and tight.





5. Check voltage between starter motor connector F27 terminal B and ground using a digital circuit tester.

Battery voltage should exist

OK or NG
OK >> GO TO 2.
NG >> Check harness between the battery and the starter motor for open circuit.
2.CHECK VOLTAGE DROP ON STARTER MOTOR CIRCUIT





1. Check voltage between starter motor connector F27 terminal B and battery positive terminal using a digital circuit tester.

Ignition switch in START : Less than 0.2 V

OK or NG
OK >> GO TO 3.
NG >> Check harness between the battery and the starter motor for poor continuity.
3.CHECK VOLTAGE DROP ON STARTER MOTOR GROUND CIRCUIT





1. Check voltage between starter motor case and battery negative terminal using a digital circuit tester.

Ignition switch in START : Less than 0.2 V

OK or NG
OK >> Starter motor ground circuit is OK. Further inspection is necessary. Refer to "WORK FLOW".
NG >> Check harness between the starter motor case and ground for poor continuity.

DIAGNOSTIC PROCEDURE 2

Check Magnetic Switch Circuit
1.CHECK POWER SUPPLY TO MAGNETIC SWITCH
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition switch OFF.
4. Disconnect starter motor connector F28.





5. Check voltage between starter motor connector F28 terminal S and ground using a digital circuit tester.

Ignition switch in START : Battery voltage

OK or NG
OK >> GO TO 2.
NG >> Check the following:
- 40A fusible link (letter h, located in fuse and fusible link box)
- 10A fuse (No. 49, M/T models, located in the IPDM E/R)
- 15A fuse (No. 52, located in the IPDM E/R)
- 20A fuse (No. 53, located in the IPDM E/R)
- PNP switch, clutch interlock switch or TCM depending on equipment
- Ignition switch
- Ignition relay IPDM E/R
- Starter relay IPDM E/R
- Starter relay request ON signal from BCM
- Harness for open or short circuit
2.CHECK VOLTAGE DROP ON MAGNETIC SWITCH CIRCUIT
1. Connect starter motor connector F28.





2. Check voltage between starter motor connector F28 terminal S and battery positive terminal using a digital circuit tester.

Ignition switch in START : Less than 1 V

OK or NG
OK >> Magnetic switch circuit is OK. Further inspection is necessary. Refer to "WORK FLOW".
NG >> Check harness, components and connections between the battery and the magnetic switch for poor continuity.

MINIMUM SPECIFICATION OF CRANKING VOLTAGE REFERENCING COOLANT TEMPERATURE