DTC U2300:54 [CONNECTIVITY MASTER UNIT]

id1602a1008800

Outline

System malfunction location

Configuration data of body control module (BCM) not received

Detection condition

•  The connectivity master unit (CMU) detects that the configuration data as estimated from the body control module (BCM) cannot be received for 6 s.

Fail-safe

Not applicable

Possible cause

•  Inappropriate connectivity master unit (CMU) replacement procedure

•  Configuration data of body control module (BCM) and connectivity master unit (CMU) not matched

―  Body control module (BCM) configuration data write error

―  The connectivity master unit (CMU) configuration after replacement is not implemented.

•  Connectivity master unit (CMU) malfunction

•  Body control module (BCM) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Configuration data of body control module (BCM) not received
Detection condition	• The connectivity master unit (CMU) detects that the configuration data as estimated from the body control module (BCM) cannot be received for 6 s.
Fail-safe	Not applicable
Possible cause	• Inappropriate connectivity master unit (CMU) replacement procedure • Configuration data of body control module (BCM) and connectivity master unit (CMU) not matched ― Body control module (BCM) configuration data write error ― The connectivity master unit (CMU) configuration after replacement is not implemented. • Connectivity master unit (CMU) malfunction • Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT BODY CONTROL MODULE (BCM) AND CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION

•  Perform the DTC inspection for the body control module (BCM) and the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Are any of the following DTCs displayed?

―  Code related to body control module (BCM) communication error, internal malfunction

―  Code related to internal malfunction of connectivity master unit (CMU)

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual)

(See DTC TABLE [CONNECTIVITY MASTER UNIT (E)].)

No

Go to the next step.

2

VERIFY REPLACEMENT RECORD OF CONNECTIVITY MASTER UNIT (CMU)

•  Verify if the connectivity master unit (CMU) has been replaced before performing this troubleshooting procedure.

•  Has the connectivity master unit (CMU) been replaced?

Yes

After implementing the required servicing according to procedure when replacing a module, perform the repair completion verification.

(Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)

No

Go to the next step.

3

VERIFY IF MALFUNCTION IS CAUSED BY BODY CONTROL MODULE (BCM) CONFIGURATION ERROR

•  Switch the ignition OFF and wait for 30 s or more.

•  Switch the ignition ON (engine off or on) and wait for 30 s or more.

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is the same Pending DTC present?

Yes

Go to the next step.

No

Go to repair completion verification 2.

4

VERIFY BODY CONTROL MODULE (BCM) CONFIGURATION RELATED DTCs

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Perform the DTC inspection for the body control module (BCM).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is a configuration related DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual)

No

Go to the next step.

5

RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM)

•  Using the M-MDS, perform the body control module (BCM) configuration.
(Refer to the [CONFIGURATION] in the workshop manual)

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is the same Pending DTC present?

Yes

Replace the connectivity master unit (CMU) and perform the repair completion verification.

(Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)

No

Go to repair completion verification 2.

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the body control module (BCM), then go to the next step.
(Refer to the [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION] in the workshop manual)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs ARE DISPLAYED

•  Perform the DTC inspection.
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	INSPECT BODY CONTROL MODULE (BCM) AND CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION • Perform the DTC inspection for the body control module (BCM) and the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Are any of the following DTCs displayed? ― Code related to body control module (BCM) communication error, internal malfunction ― Code related to internal malfunction of connectivity master unit (CMU)	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual) (See DTC TABLE [CONNECTIVITY MASTER UNIT (E)].)
1		No	Go to the next step.
2	VERIFY REPLACEMENT RECORD OF CONNECTIVITY MASTER UNIT (CMU) • Verify if the connectivity master unit (CMU) has been replaced before performing this troubleshooting procedure. • Has the connectivity master unit (CMU) been replaced?	Yes	After implementing the required servicing according to procedure when replacing a module, perform the repair completion verification. (Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)
2		No	Go to the next step.
3	VERIFY IF MALFUNCTION IS CAUSED BY BODY CONTROL MODULE (BCM) CONFIGURATION ERROR • Switch the ignition OFF and wait for 30 s or more. • Switch the ignition ON (engine off or on) and wait for 30 s or more. • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is the same Pending DTC present?	Yes	Go to the next step.
3		No	Go to repair completion verification 2.
4	VERIFY BODY CONTROL MODULE (BCM) CONFIGURATION RELATED DTCs • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the body control module (BCM). (Refer to the [DTC INSPECTION] in the workshop manual) • Is a configuration related DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual)
4		No	Go to the next step.
5	RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM) • Using the M-MDS, perform the body control module (BCM) configuration. (Refer to the [CONFIGURATION] in the workshop manual) • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is the same Pending DTC present?	Yes	Replace the connectivity master unit (CMU) and perform the repair completion verification. (Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)
5		No	Go to repair completion verification 2.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the body control module (BCM), then go to the next step. (Refer to the [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION] in the workshop manual)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs ARE DISPLAYED • Perform the DTC inspection. (Refer to the [DTC INSPECTION] in the workshop manual) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.