DTC B1099:11 [ELECTRICAL SUPPLY UNIT (ESU)]

id0902ff060800

Caution
•  Vehicle specifications differ depending on the vehicle identification number (VIN).
―  Type A VIN:
JMZ ND6E***# 100001—200000
JM7 ND*****# 100001—200000
JMZ ND6E***# 100001—300000
JM0 ND2E***# 100001—200000
JM6 ND2E7**# 100001—200000
―  Type B VIN:
JMZ ND6E***# 200001—
JM7 ND*****# 200001—
JMZ ND6E***# 300001—
JM0 ND2E***# 200001—
JM6 ND2E7**# 200001—

Description

Parking light (RH), taillight (LH) or license plate light (LH)/(RH) circuit malfunction
Detection condition
•  The electrical supply unit (ESU) detects a short to ground in the parking light (RH), taillight (LH) or license plate light (LH)/(RH) circuit.
Fail-safe
Not applicable
Possible cause
•  Electrical supply unit (ESU) connector or terminal malfunction
•  Front combination light (RH) connector or terminal malfunction
•  Short to ground in wiring harness between front combination light (RH) terminal D and electrical supply unit (ESU) terminal 4G
•  Front combination light (RH) malfunction
•  License plate light bulb (LH) malfunction
•  License plate light bulb (RH) malfunction
•  License plate light (LH) connector or terminal malfunction
•  License plate light (RH) connector or terminal malfunction
•  Rear combination light (LH) connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Rear combination light (LH) terminal C—Electrical supply unit (ESU) terminal 1D
―  License plate light (LH) terminal A—Electrical supply unit (ESU) terminal 1D
―  License plate light (RH) terminal A—Electrical supply unit (ESU) terminal 1D
•  Rear combination light (LH) malfunction
•  Electrical supply unit (ESU) malfunction

*1  :Type A VIN
*2  :Type B VIN

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE MALFUNCTIONING LIGHT
•  Operate the light switch to the TNS (parking lights) position.
•  Are there any lights among the following which are not illuminated?
―  Parking light (RH)
―  Taillight (LH)
―  License plate light (LH)
―  License plate light (RH)
Yes
If all lights do not turn on:
•  Go to the next step.
If parking light (RH) does not turn on:
•  Go to Step 3.
If taillight (LH) and license plate light (LH)/(RH) do not turn on:
•  Go to Step 7.
No
Go to Step 15.
2
INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  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 Step 15.
No
Repair or replace the connector, then go to Step 15.
3
INSPECT FRONT COMBINATION LIGHT (RH) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the front combination light (RH) 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 15.
4
INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION
•  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 15.
5
INSPECT PARKING LIGHT (RH) CONTROL CIRCUIT FOR SHORT TO GROUND
•  Verify that the front combination light (RH) and electrical supply unit (ESU) connectors are disconnected.
•  Inspect for continuity between front combination light (RH) terminal D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front combination light (RH) terminal D and electrical supply unit (ESU) terminal 4G.
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 ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 15.
No
Go to the next step.
6
VERIFY IF MALFUNCTIONING LOCATION IS FRONT COMBINATION LIGHT (RH) DEPENDING ON REPEATABILITY
•  Always reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Clear the DTC for the electrical supply unit (ESU) using the M-MDS.
•  Operate the light switch to the TNS (parking lights) position.
•  Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the front combination light (RH), then go to Step 15.
(See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.)
No
Go to Step 16.
7
VISUALLY INSPECT LISENCE PLATE LIGHT (LH)
•  Visually inspect the license plate light bulb (LH).
•  Is the license plate light bulb (LH) normal?
Yes
Go to the next step.
No
Replace the license plate light bulb (LH), then go to Step 15.
(See LICENSE PLATE LIGHT BULB REMOVAL/INSTALLATION.)
8
VISUALLY INSPECT LISENCE PLATE LIGHT (RH)
•  Visually inspect the license plate light bulb (RH).
•  Is the license plate light bulb (RH) normal?
Yes
Go to the next step.
No
Replace the license plate light bulb (RH), then go to Step 15.
(See LICENSE PLATE LIGHT BULB REMOVAL/INSTALLATION.)
9
INSPECT LISENCE PLATE LIGHT (LH) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the license plate light (LH) 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 15.
10
INSPECT LISENCE PLATE LIGHT (RH) CONNECTOR CONDITION
•  Disconnect the license plate light (RH) 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 15.
11
INSPECT REAR COMBINATION LIGHT (LH) CONNECTOR CONDITION
•  Disconnect the rear combination light (LH) 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 15.
12
INSPECT ELECTRICAL SUPPLY UNIT (ESU) CONNECTOR CONDITION
•  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 15.
13
INSPECT TAILLIGHT (LH) AND LICENSE PLATE LIGHT (LH)/(RH) CONTROL CIRCUIT FOR SHORT TO GROUND
•  Verify that the license plate light (LH)/(RH), rear combination light (LH) and electrical supply unit (ESU) connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Rear combination light (LH) terminal C
―  license plate light (LH) terminal A
―  license plate light (RH) terminal A
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between following terminals:
•  Rear combination light (LH) terminal C—Electrical supply unit (ESU) terminal 1D
•  License plate light (LH) terminal A—Electrical supply unit (ESU) terminal 1D
•  License plate light (RH) terminal A—Electrical supply unit (ESU) terminal 1D
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 ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 15.
No
Go to the next step.
14
VERIFY IF MALFUNCTIONING LOCATION IS REAR COMBINATION LIGHT (LH) DEPENDING ON REPEATABILITY
•  Always reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Clear the DTC for the electrical supply unit (ESU) using the M-MDS.
•  Operate the light switch to the TNS (parking lights) position.
•  Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the rear combination light (LH), then go to the next step.
(See REAR COMBINATION LIGHT REMOVAL/INSTALLATION.)
No
Go to Step 16.
15
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Clear the DTC for the electrical supply unit (ESU) using the M-MDS.
•  Operate the light switch to the TNS (parking lights) position.
•  Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the electrical supply unit (ESU).
Go to the next step.
No
Go to the next step.
16
VERIFY IF OTHER DTCs DISPLAYED
•  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.