DTC U007A:00 [TELEMATICS COMMUNICATION UNIT (TYPE-B)]

id1602a7016700

Outline

System malfunction location

Module communication error (between gateway unit (GWU) and telematics communication unit)

Detection condition

•  The telematics communication unit detects a CAN BUS communication line (between gateway unit (GWU) and telematics communication unit) malfunction.

Fail-safe

Not applicable

Possible cause

•  Malfunction in CAN bus communication line

•  Telematics communication unit malfunction

System wiring diagram

Not applicable

System malfunction location	Module communication error (between gateway unit (GWU) and telematics communication unit)
Detection condition	• The telematics communication unit detects a CAN BUS communication line (between gateway unit (GWU) and telematics communication unit) malfunction.
Fail-safe	Not applicable
Possible cause	• Malfunction in CAN bus communication line • Telematics communication unit malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT CAN COMMUNICATION LINE

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

•  Is the CAN communication line normal?

Yes

Replace the telematics communication unit and perform the repair completion verification.

(Refer to the [TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION] in the workshop manual)

No

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

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

Repair completion verification

VERIFY IF OTHER DTC IS DISPLAYED

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

•  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 CAN COMMUNICATION LINE • Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual) • Is the CAN communication line normal?	Yes	Replace the telematics communication unit and perform the repair completion verification. (Refer to the [TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION] in the workshop manual)
1		No	Repair or replace the malfunctioning location and perform the repair completion verification. (Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual)
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (Refer to the [DTC INSPECTION] in the workshop manual) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.