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STARTER MOTOR CIRCUIT

STARTER MOTOR CIRCUIT

Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK OPERATION OF STARTER MOTOR.

Does the starter motor operate?

Yes


No


CHECK DTC.

Is the DTC displayed?

Yes

Using the List of Diagnostic Trouble Code (DTC), check the appropriate DTC.


No

Repair the poor contact in ECM connector.


CHECK INPUT SIGNAL FOR STARTER MOTOR.

Turn the ignition switch to OFF.

Disconnect the connector from starter motor.

Turn the ignition switch to START.

Measure the power supply voltage between starter motor connector terminal and engine ground.

Connector & terminal

(B14) No. 1 (+) — Engine ground (−):

Note
• On AT model, move the select lever to “P” or “N” range.

• On MT model, depress the clutch pedal.


Is the voltage more than 10 V?

Yes


No


CHECK GROUND CIRCUIT OF STARTER MOTOR.

Turn the ignition switch to OFF.

Disconnect the terminal from starter motor.

Measure the resistance of ground cable between ground cable terminal and engine ground.

Is the resistance less than 5 Ω?

Yes

Check the starter motor.


No

Repair the open circuit of ground cable.


CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR.

Disconnect the connector from ignition switch.

Measure the power supply voltage between ignition switch connector and chassis ground.

Connector & terminal

(B72) No. 1 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

• Check the following, repair if necessary.

• Blown out fuse

• Open circuit in harness between ignition switch and battery


CHECK IGNITION SWITCH.

Disconnect the connector from ignition switch.

Measure the resistance between ignition switch terminals while turning ignition switch to START.

Terminals

No. 1 — No. 3:

Is the resistance less than 5 Ω?

Yes


No

Replace the ignition switch.


CHECK TRANSMISSION TYPE.

Is the transmission AT?

Yes


No


CHECK INPUT VOLTAGE OF INHIBITOR SWITCH.

Turn ignition switch to OFF.

Disconnect the connector from inhibitor switch.

Connect the connector to ignition switch.

Measure the input voltage between inhibitor switch connector terminal and engine ground while turning ignition switch to START.

Connector & terminal

(B12) No. 12 (+) — Engine ground (−):

Is the voltage more than 10 V?

Yes


No

• Repair open or short circuit to ground in harness between inhibitor switch and ignition switch.

•
Note

Check security system (if equipped).



CHECK INHIBITOR SWITCH.

Move the selector lever to “P” or “N” range.

Measure the resistance between inhibitor switch terminals.

Connector & terminal

(T3) No. 11 — No. 12:

Is the resistance less than 1 Ω?

Yes

Repair open or short circuit to ground in harness between inhibitor switch and starter motor.


No

Replace the inhibitor switch.


CHECK INPUT VOLTAGE OF STARTER INTERLOCK RELAY.

Turn ignition switch to OFF.

Disconnect the connector from starter interlock relay.

Connect the connector to ignition switch.

Measure the input voltage between starter interlock relay connector and chassis ground while turning ignition switch to START.

Connector & terminal

(B104) No. 27 (+) — Chassis ground (−):

(B104) No. 24 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

• Repair open or short circuit to ground in harness between starter interlock relay and ignition switch.

•
Note

Check security system (if equipped).



CHECK STARTER INTERLOCK RELAY.

Connect the battery to starter interlock relay terminals No. 26 and No. 24.

Measure the resistance between starter interlock relay terminals.

Terminals

No. 27 — No. 28:

Is the resistance less than 1 Ω?

Yes


No

Replace the starter interlock relay.


CHECK GROUND CIRCUIT OF CLUTCH SWITCH.

Disconnect the connector from clutch switch.

Measure the resistance between clutch switch connector and chassis ground.

Connector & terminal

(B106) No. 1 — Chassis ground:

Is the resistance less than 5 Ω?

Yes


No

Repair open circuit of ground cable.


CHECK CLUTCH SWITCH.

Measure the resistance between clutch switch terminals while depressing the clutch pedal.

Terminals

No. 1 — No. 2:

Is the resistance less than 1 Ω?

Yes


No

Replace the clutch switch.


CHECK CLUTCH SWITCH CIRCUIT.

Connect the connector to clutch switch.

Measure the resistance between starter interlock relay connector and chassis ground while depressing the clutch pedal.

Connector & terminal

(B104) No. 26 — Chassis ground:

Is the resistance less than 1 Ω?

Yes

Repair short circuit to ground in harness between starter interlock relay and starter motor.


No

Repair open circuit in harness between starter interlock relay and clutch switch.