id990200000700

Caution

• Disconnect the ground plate when servicing the following M Hybrid related parts. Otherwise, they could be damaged.

― Integrated starter generator (ISG)

― M Hybrid battery

― DC-DC converter (M Hybrid)

― Seat warmer control unit (with M Hybrid, seat warmer system, and without position memory system)

― Position memory control module (with M Hybrid and position memory system)

― Front seat (driver’s side) (with M Hybrid and seat warmer system)

Circuit Inspection Table

Inspection for Short to Ground and Open Circuit in Power Supply Circuit

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the part side of the circuit to be inspected.

am3zzw00024477

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Connect the ground plate. (For servicing M Hybrid related parts)

5.Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

6.Switch the ignition ACC (for ACC power supply circuit) or ON (engine off or on) (for IG1 power supply circuit).

7.Measure the voltage at the applicable part-side connector terminal.

atsvuw00000079

If voltage is B+:

• There is no short to ground in the circuit or an open circuit, therefore the inspection is completed.

If voltage is less than B+:

• To specify the malfunctioning location, go to the next step.

8.Inspect the fuse.

If the fuse is blown (short to ground):

• Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

― Switch the ignition off.

― Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

― Disconnect the ground plate. (For servicing M Hybrid related parts)

― Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

am3zzw00024478

― Inspect each common connector for continuity between the applicable terminal and body ground to determine the malfunctioning location.

• Repair or replace the vehicle wiring harness which is shorted to ground.

• Replace the blown fuse.

If there is no common connector:

― Repair or replace the vehicle wiring harness.

― Replace the blown fuse.

If the fuse is damaged:

• Replace the damaged fuse.

If the fuse is normal (open circuit):

• Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

― Switch the ignition off.

― Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

― Disconnect the ground plate. (For servicing M Hybrid related parts)

― Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

am3zzw00024479

― Inspect each common connector for continuity between the applicable terminals to determine the malfunctioning location.

• Repair or replace the vehicle wiring harness which has an open circuit.

If there is no common connector:

― Repair or replace the vehicle wiring harness.

Inspection for Short to Ground in Circuit

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the module side and the connector on the part side of the circuit to be inspected.

atsvuw00000082

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Inspect for continuity between the applicable terminal of the module-side or part-side connector and body ground.

atsvuw00000079

If there is continuity:

• To specify the malfunctioning location, go to the next step.

If there is no continuity:

• There is no short to ground in the circuit, therefore the inspection is completed.

5.Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

• Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

atsvuw00000083

• Inspect each common connector for continuity to determine the malfunctioning location.

― Repair or replace the vehicle wiring harness which is shorted to ground.

If there is no common connector:

• Repair or replace the vehicle wiring harness.

Inspection for Short to Power Supply in Circuit

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the module side and the connector on the part side of the circuit to be inspected.

atsvuw00000082

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Connect the ground plate. (For servicing M Hybrid related parts)

5.Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

6.Switch the ignition ON (engine off or on).

7.Measure the voltage at the applicable terminal of the module-side or part-side connector.

atsvuw00000079

If voltage exceeds 0 V:

• To specify the malfunctioning location, go to the next step.

If voltage is 0 V:

• There is no short to power supply in the circuit, therefore the inspection is completed.

8.Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

• Switch the ignition off.

• Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

• Disconnect the ground plate. (For servicing M Hybrid related parts)

• Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

atsvuw00000083

• Measure the voltage at each common connector to determine the malfunctioning location.

― Repair or replace the vehicle wiring harness which is shorted to the power supply.

If there is no common connector:

• Repair or replace the vehicle wiring harness.

Inspection for Open Circuit in Circuit

Circuit between module and part

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the module side and the connector on the part side of the circuit to be inspected.

atsvuw00000082

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Inspect for continuity between the applicable terminals of the module-side connector and the part-side connector.

atsvuw00000084

Note

• If the inspection is difficult due to the distance between the module-side and part-side connectors being too far, the inspection can be performed using only one of the connectors by shorting one of the connector terminals using a jumper wire.

atsvuw00000085

If there is continuity:

• There is no open circuit in the circuit, therefore the inspection is completed.

If there is no continuity:

• To specify the malfunctioning location, go to the next step.

5.Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

• Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

am3zzw00027664

• Inspect each common connector for continuity to determine the malfunctioning location.

― Repair or replace the vehicle wiring harness which has an open circuit.

If there is no common connector:

• Repair or replace the vehicle wiring harness.

Circuit between part and body ground

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the part side of the circuit to be inspected.

atsvuw00000087

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Inspect for continuity between the part-side connector applicable terminal and body ground.

atsvuw00000079

If there is continuity:

• There is no open circuit in the circuit, therefore the inspection is completed.

If there is no continuity:

• To specify the malfunctioning location, go to the next step.

5.Inspect for loose or lifting ground point.

If there is any malfunction:

• Repair or replace the malfunctioning part.

If there is no malfunction:

• Go to the next step.

6.Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

• Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

• Inspect each common connector for continuity to determine the malfunctioning location.

am3zzw00027665

― Repair or replace the vehicle wiring harness which has an open circuit.

If there is no common connector:

• Repair or replace the vehicle wiring harness.

Inspection for Short Circuit in Circuits

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)

2.Disconnect the ground plate. (For servicing M Hybrid related parts)

3.Disconnect the connector on the module side and the connector on the part side of the circuit to be inspected.

atsvuw00000082

Note

• For the connector disconnection procedure, refer to the removal/installation procedure for each part.

4.Inspect for continuity between the applicable terminals of the module-side or part-side connector.

atsvuw00000089

If there is continuity:

• To specify the malfunctioning location, go to the next step.

If there is no continuity:

• There is no short between circuits, therefore the inspection is completed.

5.Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

If there is a common connector:

• Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION.)

• Inspect each common connector for continuity to determine the malfunctioning location.

atsvuw00000090

― Repair or replace the vehicle wiring harness which is shorted.

If there is no common connector:

• Repair or replace the vehicle wiring harness.