DTC B13D2:12 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2008700

Description

Front fog light relay circuit malfunction
Detection condition
•  Front body control module (FBCM) detects a short to power supply in the front fog light relay circuit with the ignition switched ON (engine off or on).
Fail-safe function
Not applicable
Possible cause
•  Front fog light relay malfunction
•  Front body control module (FBCM) connector or terminal malfunction
•  Short to power supply in wiring harness between front fog light relay terminal E and front body control module (FBCM) terminal 2AB
•  Front body control module (FBCM) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs AGAIN
•  Clear the DTC for the front body control module (FBCM) using the M-MDS.
•  Operate the light switch to the HEAD position and the fog light switch to the F.FOG position.
•  Retrieve the front body control module (FBCM) DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Go to the next step.
No
Go to Step 6.
2
INSPECT FRONT FOG LIGHT RELAY
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Remove the front fog light relay.
•  Inspect the front fog light relay.
•  Is the front fog light relay normal?
Yes
Go to the next step.
No
Replace the front fog light relay, then go to Step 5.
(See RELAY LOCATION.)
3
INSPECT FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION
•  Disconnect the front body control module (FBCM) 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 5.
4
INSPECT FOR SHORT TO POWER SUPPLY IN FRONT FOG LIGHT RELAY CONTROL CIRCUIT
•  Verify that the front fog light relay is removed.
•  Verify that the front body control module (FBCM) connector is disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the front body control module (FBCM) terminal 2AB (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 front fog light relay terminal E and front body control module (FBCM) terminal 2AB.
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.
5
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC for the front body control module (FBCM) using the M-MDS.
•  Operate the light switch to the HEAD position and the fog light switch to the F.FOG position.
•  Retrieve the front body control module (FBCM) DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the front body control module (FBCM).
Go to the next step.
No
Go to the next step.
6
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 [FRONT BODY CONTROL MODULE (FBCM)].)
No
DTC troubleshooting completed.