Lexus ES: Lost Communication With ECM/PCM "A" (U0100,...,U1117)

Lexus ES (XZ10) Service Manual / Vehicle Interior / Lighting (ext) / Lighting System (for Hv Model) / Lost Communication With ECM/PCM "A" (U0100,...,U1117)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs.

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(f) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTCs are not output.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

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TERMINALS OF ECU CHECK LUGGAGE CLOSER MOTOR ASSEMBLY (a) Disconnect the R7 luggage closer motor assembly connector. (b) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition

Motor/Generator Shutdown Signal Stuck Off (P321E9F)

DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the power switch is turned on (IG) and during the shu

Lexus ES: Lost Communication With ECM/PCM "A" (U0100,...,U1117)

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Motor/Generator Shutdown Signal Stuck Off (P321E9F)

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U0100	Lost Communication With ECM/PCM "A"	The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.	CAN communication system ECM	Main body ECU (multiplex network body ECU)
U0101	Lost Communication with TCM	The main body ECU (multiplex network body ECU) does not receive data from the Hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Main body ECU (multiplex network body ECU)
U0120	Lost Communication With Starter / Generator Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	CAN communication system Certification ECU (smart key ECU assembly)	Main body ECU (multiplex network body ECU)
U0126	Lost Communication with Steering Angle Sensor Module	The main body ECU (multiplex network body ECU) does not receive data from the steering sensor for approximately 10 seconds or more.	CAN communication system Steering sensor	Main body ECU (multiplex network body ECU)
U0129	Lost Communication with Brake System Control Module	The main body ECU (multiplex network body ECU) does not receive data from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds or more.	CAN communication system Skid control ECU (brake booster with master cylinder assembly)	Main body ECU (multiplex network body ECU)
U0151	Lost Communication with Restraints Control Module	The main body ECU (multiplex network body ECU) does not receive data from the airbag ECU assembly for approximately 10 seconds or more.	CAN communication system Airbag ECU assembly	Main body ECU (multiplex network body ECU)
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.	CAN communication system Combination meter assembly	Main body ECU (multiplex network body ECU)
U0163	Lost Communication with Navigation Control Module	The main body ECU (multiplex network body ECU) does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.	CAN communication system Radio and display receiver assembly	Main body ECU (multiplex network body ECU)
U0164	Lost Communication with HVAC Control Module	The main body ECU (multiplex network body ECU) does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.	CAN communication system Air conditioning amplifier assembly	Main body ECU (multiplex network body ECU)
U0182	Lost Communication with AFS	The main body ECU (multiplex network body ECU) does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.	CAN communication system Headlight ECU sub-assembly LH	Main body ECU (multiplex network body ECU)
U0199	Lost Communication with "Door Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly RH for approximately 10 seconds or more.	CAN communication system Outer mirror control ECU assembly RH	Main body ECU (multiplex network body ECU)
U0200	Lost Communication with "Door Control Module B"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly LH for approximately 10 seconds or more.	CAN communication system Outer mirror control ECU assembly LH	Main body ECU (multiplex network body ECU)
U0208	Lost Communication with "Seat Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the position control ECU assembly (driver seat) for approximately 10 seconds or more.	CAN communication system Position control ECU assembly (driver seat)	Main body ECU (multiplex network body ECU)
U0230	Lost Communication with Rear Gate Module	The main body ECU (multiplex network body ECU) does not receive data from the luggage closer motor assembly for approximately 10 seconds or more.	CAN communication system Luggage closer motor assembly	Main body ECU (multiplex network body ECU)
U023A	Lost Communication With Image Processing Module "A"	The main body ECU (multiplex network body ECU) does not receive data from the forward recognition camera for approximately 10 seconds or more.	CAN communication system Forward recognition camera	Main body ECU (multiplex network body ECU)
U0293	Lost Communication With Hybrid Powertrain Control Module	The main body ECU (multiplex network body ECU) does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Main body ECU (multiplex network body ECU)
U0327	Software Incompatibility with Vehicle Security Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	CAN communication system Certification ECU (smart key ECU assembly)	Main body ECU (multiplex network body ECU)
U1106	Lost Communication with Electric Parking Brake Module	The main body ECU (multiplex network body ECU) does not receive data from the parking brake ECU (brake actuator assembly) for approximately 10 seconds or more.	CAN communication system Parking brake ECU (brake actuator assembly)	Main body ECU (multiplex network body ECU)
U1115	Lost Communication with Tilt & Telescopic Module	The main body ECU (multiplex network body ECU) does not receive data from the multiplex tilt and telescopic ECU for approximately 10 seconds or more.	CAN communication system Multiplex tilt and telescopic ECU	Main body ECU (multiplex network body ECU)
U1117	Lost Communication with Accessory Gateway	The main body ECU (multiplex network body ECU) does not receive data from the option connector (bus buffer ECU) for approximately 10 seconds or more.	CAN communication system Option connector (bus buffer ECU)	Main body ECU (multiplex network body ECU)