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DTC U2300:55 [EMERGENCY CALL UNIT]

id0902s6127300

Outline

System malfunction location

Configuration error (no configuration)

Detection condition

•  The emergency call unit detects any of the following conditions.

―  The emergency call unit cannot receive the same configuration data from the body control module (BCM) for a continuous 2 times.

―  Configuration data cannot be written to emergency call unit memory.

Fail-safe

Not applicable

Possible cause

•  DTCs are stored in the body control module (BCM).

•  Inappropriate emergency call unit replacement procedure

•  Body control module (BCM) configuration data write error

•  Malfunction in CAN bus communication line

•  Emergency call unit malfunction

•  Body control module (BCM) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Configuration error (no configuration)
Detection condition	• The emergency call unit detects any of the following conditions. ― The emergency call unit cannot receive the same configuration data from the body control module (BCM) for a continuous 2 times. ― Configuration data cannot be written to emergency call unit memory.
Fail-safe	Not applicable
Possible cause	• DTCs are stored in the body control module (BCM). • Inappropriate emergency call unit replacement procedure • Body control module (BCM) configuration data write error • Malfunction in CAN bus communication line • Emergency call unit 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) FOR MALFUNCTION

•  Perform the DTC inspection for the body control module (BCM).
(See DTC INSPECTION.)

•  Is a DTC related to body control module (BCM) communication error or internal malfunction displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)

No

Go to the next step.

2

VERIFY EMERGENCY CALL UNIT REPLACEMENT RECORD

•  Verify if the emergency call unit has been replaced before performing this troubleshooting procedure.

•  Has the emergency call unit been replaced?

Yes

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

(See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)

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.
(See CLEARING DTC.)

•  Perform the DTC inspection for the emergency call unit.
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Go to the next step.

No

Go to repair completion verification.

4

VERIFY BODY CONTROL MODULE (BCM) CONFIGURATION RELATED DTCs

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Perform the DTC inspection for the body control module (BCM).
(See DTC INSPECTION.)

•  Is a configuration related DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)

No

Go to the next step.

5

INSPECT CAN COMMUNICATION LINE

•  Perform an inspection in accordance with the multiplex communication system diagnostic procedure.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

•  Is the CAN communication line normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

6

RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM)

•  Using the M-MDS, perform the body control module (BCM) configuration.
(See CONFIGURATION.)

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Perform the CMDTC self-test.
(See DTC INSPECTION.)

•  Is a configuration related DTC displayed?

Yes

If a configuration related DTC is displayed on other modules simultaneously

•  Replace the body control module (BCM) and perform the repair completion verification.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

If a configuration related DTC is not displayed on other modules simultaneously

•  Replace the emergency call unit and perform the repair completion verification.
(See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)

No

Go to repair completion verification.

Repair completion verification

VERIFY IF OTHER DTC IS DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any other DTCs 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) FOR MALFUNCTION • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is a DTC related to body control module (BCM) communication error or internal malfunction displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
1		No	Go to the next step.
2	VERIFY EMERGENCY CALL UNIT REPLACEMENT RECORD • Verify if the emergency call unit has been replaced before performing this troubleshooting procedure. • Has the emergency call unit been replaced?	Yes	After implementing the required servicing according to procedure when replacing a module, perform the repair completion verification. (See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)
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. (See CLEARING DTC.) • Perform the DTC inspection for the emergency call unit. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Go to the next step.
3		No	Go to repair completion verification.
4	VERIFY BODY CONTROL MODULE (BCM) CONFIGURATION RELATED DTCs • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is a configuration related DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
4		No	Go to the next step.
5	INSPECT CAN COMMUNICATION LINE • Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) • Is the CAN communication line normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)
6	RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM) • Using the M-MDS, perform the body control module (BCM) configuration. (See CONFIGURATION.) • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the CMDTC self-test. (See DTC INSPECTION.) • Is a configuration related DTC displayed?	Yes	If a configuration related DTC is displayed on other modules simultaneously • Replace the body control module (BCM) and perform the repair completion verification. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].) If a configuration related DTC is not displayed on other modules simultaneously • Replace the emergency call unit and perform the repair completion verification. (See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)
6		No	Go to repair completion verification.
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.