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DTC U0452:86 [EMERGENCY CALL UNIT]

id0902s6126900

Outline

System malfunction location

Sophisticated Airbag Sensor (SAS) control module collision judgement system malfunction

Detection condition

•  The emergency call unit received the invalid signal from the Sophisticated Airbag Sensor (SAS) control module.

Fail-safe

Not applicable

Possible cause

•  Sophisticated Airbag Sensor (SAS) control module malfunction

•  Malfunction in CAN communication line between the Sophisticated Airbag Sensor (SAS) control module and emergency call unit

•  Emergency call unit malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Sophisticated Airbag Sensor (SAS) control module collision judgement system malfunction
Detection condition	• The emergency call unit received the invalid signal from the Sophisticated Airbag Sensor (SAS) control module.
Fail-safe	Not applicable
Possible cause	• Sophisticated Airbag Sensor (SAS) control module malfunction • Malfunction in CAN communication line between the Sophisticated Airbag Sensor (SAS) control module and emergency call unit • Emergency call unit malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT SOPHISTICATED AIRBAG SENSOR (SAS) CONTROL MODULE FOR MALFUNCTION

•  Perform the DTC inspection for the Sophisticated Airbag Sensor (SAS) control module.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

(See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)

No

Go to the next step.

2

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

Replace the emergency call unit, and perform the repair completion verification.

(See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)

No

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

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

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 SOPHISTICATED AIRBAG SENSOR (SAS) CONTROL MODULE FOR MALFUNCTION • Perform the DTC inspection for the Sophisticated Airbag Sensor (SAS) control module. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].) (See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].)
1		No	Go to the next step.
2	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	Replace the emergency call unit, and perform the repair completion verification. (See EMERGENCY CALL UNIT REMOVAL/INSTALLATION.)
2		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)
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.