Toyota Yaris: Air Conditioning System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U013187,U014087,U015587,U016387)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U013187,U014087,U015587,U016387)

DESCRIPTION

These DTCs are stored when the CAN communication system is malfunctioning.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
U010087	Lost Communication with ECM/PCM "A" Missing Message	Diagnosis Condition: IG voltage 8.5 V or higher Malfunction Status: No communication with ECM Detection Time: Continuously for 10 seconds or more	CAN communication system ECM Air conditioning amplifier assembly	Memorized
U013187	Lost Communication with Power Steering Control Module Missing Message	Diagnosis Condition: IG voltage 8.5 V or higher Malfunction Status: No communication with power steering ECU assembly Detection Time: Continuously for 10 seconds or more	CAN communication system Power steering ECU assembly Air conditioning amplifier assembly	Memorized
U014087	Lost Communication with Body Control Module Missing Message	Diagnosis Condition: IG voltage 8.5 V or higher Malfunction Status: No communication with main body ECU (multiplex network body ECU) Detection Time: Continuously for 10 seconds or more	CAN communication system Main body ECU (multiplex network body ECU) Air conditioning amplifier assembly	Memorized
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	Diagnosis Condition: IG voltage 8.5 V or higher Malfunction Status: No communication with combination meter assembly Detection Time: Continuously for 10 seconds or more	CAN communication system Combination meter assembly Air conditioning amplifier assembly	Memorized
U016387	Lost Communication with Navigation Control Module Missing Message	Diagnosis Condition: IG voltage 8.5 V or higher Malfunction Status: No communication with radio and display receiver assembly Detection Time: Continuously for 10 seconds or more	CAN communication system Radio and display receiver assembly Air conditioning amplifier assembly	Memorized

PROCEDURE

1.	CHECK DTC OUTPUT

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result	Proceed to
DTC U010087, U013187, U014087, U015587 or U016387 is output	A
DTCs are not output	B
None of the above conditions are met	C

GO TO CAN COMMUNICATION SYSTEM

USE SIMULATION METHOD TO CHECK

GO TO DTC CHART

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DESCRIPTION The blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio...

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