DTC B13D0:11 [FRONT BODY CONTROL MODULE (FBCM)] - MAZDA CX-9 TC 2016

DTC B13D0:11 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2008500

Description	License plate light/taillight circuit malfunction
Detection condition	• Front body control module (FBCM) detects a short to ground in the license plate light/taillight circuit with the ignition switched ON (engine off or on).
Fail-safe function	Not applicable
Possible cause	• License plate light bulb (LH) malfunction • License plate light bulb (RH) malfunction • Front body control module (FBCM) connector or terminal malfunction • Taillight (rear combination light) (LH) connector or terminal malfunction • Taillight (rear combination light) (RH) connector or terminal malfunction • Taillight (liftgate light) (LH) connector or terminal malfunction (with taillight (liftgate light)) • Taillight (liftgate light) (RH) connector or terminal malfunction (with taillight (liftgate light)) • License plate light (LH) connector or terminal malfunction • License plate light (RH) connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ? Taillight (rear combination light) (LH) terminal C—Front body control module (FBCM) terminal 1I ? Taillight (rear combination light) (RH) terminal C—Front body control module (FBCM) terminal 1I ? Taillight (liftgate light) (LH) terminal A—Front body control module (FBCM) terminal 1I (with taillight (liftgate light)) ? Taillight (liftgate light) (RH) terminal A—Front body control module (FBCM) terminal 1I (with taillight (liftgate light)) ? License plate light (LH) terminal A—Front body control module (FBCM) terminal 1I ? License plate light (RH) terminal A—Front body control module (FBCM) terminal 1I • Taillight (rear combination light) (LH) malfunction • Taillight (rear combination light) (RH) malfunction • Taillight (liftgate light) (LH) malfunction (with taillight (liftgate light)) • Taillight (liftgate light) (RH) malfunction (with taillight (liftgate light)) • Front body control module (FBCM) malfunction

*1 :With taillight (liftgate light)

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. (See CLEARING DTC [FRONT BODY CONTROL MODULE (FBCM)].) • Operate the light switch in TNS position. • Retrieve the front body control module (FBCM) DTCs using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Is the same DTC displayed?	Yes	Go to the next step.
1		No	Go to Step 8.
2	INSPECT LICENSE PLATE LIGHT BULB (LH) • Inspect the license plate light bulb (LH). • Is the license plate light bulb (LH) normal?	Yes	Go to the next step.
2		No	Replace the license plate light bulb (LH), then go to Step 7. (See LICENSE PLATE LIGHT BULB REMOVAL/INSTALLATION.)
3	INSPECT LICENSE PLATE LIGHT BULB (RH) • Inspect the license plate light bulb (RH). • Is the license plate light bulb (RH) normal?	Yes	Go to the next step.
3		No	Replace the license plate light bulb (RH), then go to Step 7. (See LICENSE PLATE LIGHT BULB REMOVAL/INSTALLATION.)
4	INSPECT CONNECTORS • Switch the ignition to off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the following connectors and inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. ? Front body control module (FBCM) ? Taillight (rear combination light) (LH) ? Taillight (rear combination light) (RH) ? Taillight (liftgate light) (LH) (with taillight (liftgate light)) ? Taillight (liftgate light) (RH) (with taillight (liftgate light)) ? License plate light (LH) ? License plate light (RH) • Are all connectors normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning connector, then go to Step 7.
5	INSPECT FOR SHORT TO GROUND IN LICENSE PLATE LIGHT/TAILLIGHT CIRCUIT • Verify that the following connectors are disconnected: ? Front body control module (FBCM) ? Taillight (rear combination light) (LH) ? Taillight (rear combination light) (RH) ? Taillight (liftgate light) (LH) (with taillight (liftgate light)) ? Taillight (liftgate light) (RH) (with taillight (liftgate light)) ? License plate light (LH) ? License plate light (RH) • Inspect for continuity between front body control module (FBCM) terminal 1I (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 the following terminals: • Taillight (rear combination light) (LH) terminal C—Front body control module (FBCM) terminal 1I • Taillight (rear combination light) (RH) terminal C—Front body control module (FBCM) terminal 1I • Taillight (liftgate light) (LH) terminal A—Front body control module (FBCM) terminal 1I (with taillight (liftgate light)) • Taillight (liftgate light) (RH) terminal A—Front body control module (FBCM) terminal 1I (with taillight (liftgate light)) • License plate light (LH) terminal A—Front body control module (FBCM) terminal 1I • License plate light (RH) terminal A—Front body control module (FBCM) terminal 1I 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 7.
5		No	Go to the next step.
6	PERFORM DTC INSPECTION AND VERIFY TAILLIGHT (REAR COMBINATION LIGHT)/TAILLIGHT (LIFTGATE LIGHT) (WITH TAILLIGHT (LIFTGATE LIGHT)) MALFUNCTION • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the front body control module (FBCM) using the M-MDS. (See CLEARING DTC [FRONT BODY CONTROL MODULE (FBCM)].) • Operate the light switch in TNS position. • Retrieve the front body control module (FBCM) DTCs using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Is the same DTC displayed?	Yes	Repair or replace the rear combination light/liftgate light (with taillight (liftgate light)), then go to the next step. (See REAR COMBINATION LIGHT REMOVAL/INSTALLATION.) (See LIFTGATE LIGHT REMOVAL/INSTALLATION.)
6		No	Go to Step 8.
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the front body control module (FBCM) using the M-MDS. (See CLEARING DTC [FRONT BODY CONTROL MODULE (FBCM)].) • Operate the light switch in TNS position. • Retrieve the front body control module (FBCM) DTCs using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the front body control module (FBCM). (See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.) Go to the next step.
7		No	Go to the next step.
8	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)].)
8		No	DTC troubleshooting completed.