Toyota Venza: Lost Communication with "Door Control Module B" (U0200)

Toyota Venza Service Manual / Networking / Can Communication System / Lost Communication with "Door Control Module B" (U0200)

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
U0200	No communication from the outer mirror control ECU assembly (for driver side).	Outer mirror control ECU assembly (for driver side) branch wire or connector Power source circuit of outer mirror outer mirror control ECU assembly (for driver side) Outer mirror control ECU assembly (for driver side)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the ignition switch off before inspecting CAN bus wires for a ground short.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

1.	RECONFIRM DTC OUTPUT

(a) Reconfirm DTCs.

HINT:

If CAN MS bus DTC U1002 is output from the main body ECU (Techstream display: Main Body), troubleshoot for U1002 and check for malfunctions in the CAN MS bus circuit.

Result	Proceed to
U1002 is not output from main body ECU (Techstream display: Main Body)	A
U1002 is output from main body ECU (Techstream display: Main Body)	B

GO TO CIRCUITS INDICATED BY OUTPUT DTCS

2.	CHECK FOR OPEN IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU ASSEMBLY BRANCH WIRE)

(a) Turn the ignition switch off.

(b) Disconnect the outer mirror control ECU assembly (for driver side) connector.

Text in Illustration

*1	Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side))

Standard Resistance:

Tester Connection	Condition	Specified Condition
I13-9 (CANP) - I13-8 (CANN)	Ignition switch off	54 to 69 Ω

REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY BRANCH WIRE)

3.	CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
I13-6 (CPUB) - Body ground	Always	11 to 14 V
I13-5 (SIG) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*1	Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side))

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

4.	CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I13-7 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Outer Mirror Control ECU Assembly (for Driver Side))

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE)

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

Lost Communication with "Door Control Module A" (U0199)

DESCRIPTION DTC No. DTC Detection Condition Trouble Area U0199 No communication from the outer mirror control ECU (for front passenger ...

Lost Communication with ECM / PCM (U0100)

DESCRIPTION DTC No. DTC Detection Condition Trouble Area U0100 No communication from the ECM continues. ECM main wir ...

Other materials about Toyota Venza:

Rear Occupant Classification Sensor LH Collision Detection (B1787)
DESCRIPTION DTC B1787 is output when the occupant classification ECU receives a collision detection signal sent by the rear occupant classification sensor LH if an accident occurs. DTC B1787 is also output when the front seat assembly RH is subjected to ...

Power Source Mode does not Change to ON (ACC)
DESCRIPTION When the engine switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode. HINT: To allow use of the Techstream to inspect the push-button start function when the ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: When installing the mouldings, heat the vehicle body and mouldings using a heat light. Heating Temperature Item Temperature Vehicle Body 40 to 60°C (104 to 140 ...