ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostics for Engine Starting Failure > STARTER MOTOR CIRCUIT

ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostics for Engine Starting Failure

STARTER MOTOR CIRCUIT

CAUTION:

After repairing or replacing the defective part, perform the Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK BATTERY. Check the battery voltage.	Is the voltage 12 V or more?		Charge or replace the battery.
2.CHECK OPERATION OF STARTER MOTOR.	Does the starter motor operate?
3.CHECK DTC.	Is DTC displayed?	Check the appropriate DTC using the List of Diagnostic Trouble Code (DTC).	Repair the poor contact of ECM connector.
4.CHECK INPUT SIGNAL FOR STARTER MOTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from starter motor. 3) Turn the ignition switch to ST. 4) Measure the power supply voltage between starter motor connector terminal and engine ground. Connector & terminal (B14) No. 1 (+) — Engine ground (−): NOTE: • For AT model, place the select lever in “P” or “N” range. • For MT model, depress the clutch pedal.	Is the voltage 10 V or more?	Check the starter motor.
5.CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR. 1) Disconnect the connector from ignition switch. 2) Measure the power supply voltage between ignition switch connector and chassis ground. Connector & terminal (B72) No. 1 (+) — Chassis ground (−):	Is the voltage 10 V or more?		Repair the open circuit of harness between ignition switch and battery, and check fuse SBF No. 4 and SBF No. 1.
6.CHECK IGNITION SWITCH. 1) Disconnect the connector from ignition switch. 2) Measure the resistance between ignition switch terminals after turning the ignition switch to ST. Terminals No. 1 — No. 3:	Is the resistance less than 5 Ω?	Check the poor contact of the ignition switch. AT model	Replace the ignition switch.
7.CHECK INPUT VOLTAGE OF INHIBITOR SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from inhibitor switch. 3) Connect the connector to the ignition switch. 4) Measure the input voltage between inhibitor switch connector terminal and engine ground while turning the ignition switch to ST. Connector & terminal (B12) No. 12 (+) — Engine ground (−):	Is the voltage 10 V or more?		Repair open or ground short circuit of harness between inhibitor switch and ignition switch.
8.CHECK INHIBITOR SWITCH. 1) Place the select lever in “P” or “N” range. 2) Measure the resistance between inhibitor switch terminals. Connector & terminal (T3) No. 11 — No. 12:	Is the resistance less than 1 Ω?	Check the poor contact of the inhibitor switch.	Replace the inhibitor switch.