Description

Trunk compartment light circuit malfunction

Detection condition

• Electrical supply unit (ESU) detects a short to power supply in the trunk compartment light circuit.

Fail-safe

Not applicable

Possible cause

• Trunk compartment light bulb malfunction

• Trunk compartment light connector or terminal malfunction

• Trunk compartment light malfunction

• Electrical supply unit (ESU) connector or terminal malfunction

• Short to power supply in wiring harness between trunk compartment light terminal B and electrical supply unit (ESU) terminal 2F

• Electrical supply unit (ESU) malfunction

Step

Inspection

Action

1

• Visually inspect the trunk compartment light bulb.

• Is the trunk compartment light bulb normal?

Yes

Go to the next step.

No

Replace the trunk compartment light bulb, then go to Step 6.

(See TRUNK COMPARTMENT LIGHT BULB REMOVAL/INSTALLATION.)

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the trunk compartment light connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

3

• Inspect the trunk compartment light.

  (See TRUNK COMPARTMENT LIGHT INSPECTION.)

• Is the trunk compartment light normal?

Yes

Go to the next step.

No

Replace the trunk compartment light, then go to Step 6.

(See TRUNK COMPARTMENT LIGHT REMOVAL/INSTALLATION.)

4

• Disconnect the electrical supply unit (ESU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

5

• Verify that the trunk compartment light and electrical supply unit (ESU) connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

• Measure the voltage at the trunk compartment light terminal B (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between trunk compartment light terminal B and electrical supply unit (ESU) terminal 2F.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to the next step.

6

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the electrical supply unit (ESU) using the M-MDS.

  (See CLEARING DTC [ELECTRICAL SUPPLY UNIT (ESU)].)

• Open the trunk and turn the trunk compartment light switch on.

• Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.

  (See DTC INSPECTION [ELECTRICAL SUPPLY UNIT (ESU)].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the electrical supply unit (ESU).

  (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ELECTRICAL SUPPLY UNIT (ESU)].)

No

DTC troubleshooting completed.