2011 Lexus ES350 Service & Repair Manual

2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 CAN COMMUNICATION SYSTEM DTC B1207: CERTIFICATION ECU COMMUNICATION MALFUNCTION DESCRIPTION The main body ECU will store this DTC when no signals can be received from the certification ECU while the CAN MS main bus is normal. WIRING DIAGRAM DTC No. DTC Detection Condition Trouble Area B1207 No communication from certification ECU 1. Open or short in CAN No. 3 J/C and certification ECU 2. Certification ECU power source circuit 3. Certification ECU 4. Wire harness or connector 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 1 © 2011 Mitchell Repair Information Company, LLC. Thursday, September 18, 2014 11:27:26 AM Page 1 © 2011 Mitchell Repair Information Company, LLC.

Fig. 1: Identifying Certification ECU Communication Malfunction Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE HINT: Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change. PROCEDURE NOTE:  Turn the engine switch off before measuring the resistance of CAN bus main wires and CAN bus branch wires.  After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.  Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine 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. 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 2 © 2011 Mitchell Repair Information Company, LLC.

1. CHECK DTC a. Check for DTCs. HINT: If CAN MS bus communication error DTC B2326 is output, troubleshoot for B2326 and check for malfunctions in the CAN MS main bus circuit. Refer to DTC B2326: CAN MS Bus Line Communication Malfunction . Result B --> See step 4 A: Go to next step 2. CHECK CAN MS BUS WIRE (CERTIFICATION ECU) a. Turn the engine switch off. Result Proceed to B2326 is not output A B2326 is output B 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 3 © 2011 Mitchell Repair Information Company, LLC.

Fig. 2: Disconnecting Connector E13 From Certification ECU Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. b. Disconnect connector E13 from the certification ECU. c. Measure the resistance according to the value(s) in the table below. Standard resistance NG --> REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR Tester Connection Condition Specified Value E13-27 (CANH) - E13-28 (CANL) Engine switch OFF 108 to 132 ohms 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 4 © 2011 Mitchell Repair Information Company, LLC.

(CERTIFICATION ECU) OK: Go to next step 3. CHECK HARNESS AND CONNECTOR (IG, E) a. Measure the resistance according to the value(s) in the table below. Fig. 3: Identifying Certification ECU Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard resistance Tester Connection Condition Specified Value E13-17 (E) - Always Below 1 ohms 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 5 © 2011 Mitchell Repair Information Company, LLC.

b. Measure the voltage according to the value(s) in the table below. Standard voltage NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CERTIFICATION ECU 4. GO TO DTC TABLE. Refer to DIAGNOSTIC TROUBLE CODE TABLE DTC B1213: TILT AND TELESCOPIC ECU COMMUNICATION STOP DESCRIPTION The main body ECU will store this DTC when no signals can be received from the tilt and telescopic ECU while the CAN MS main bus is normal. WIRING DIAGRAM Body ground Tester Connection Condition Specified Value E13-18 (IG) - Body ground Engine switch on (IG) 10 to 14 V DTC No. DTC Detection Condition Trouble Area B1213 No communication from multiplex tilt and telescopic ECU 1. Open or short in CAN No. 3 J/C and multiplex tilt and telescopic ECU 2. Multiplex tilt and telescopic ECU power source circuit 3. Multiplex tilt and telescopic ECU 4. Wire harness or connector 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 6 © 2011 Mitchell Repair Information Company, LLC.

Fig. 4: Tilt And Telescopic ECU - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE HINT: Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change. PROCEDURE NOTE:  Turn the engine switch off before measuring the resistance of CAN bus main wires and CAN bus branch wires.  After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.  Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine 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. 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 7 © 2011 Mitchell Repair Information Company, LLC.

1. CHECK DTC a. Check for DTCs. HINT: If CAN MS bus communication error DTC B2326 is output, troubleshoot for B2326 and check for malfunctions in the CAN MS main bus circuit. Refer to DTC B2326: CAN MS Bus Line Communication Malfunction . Result B --> See step 5 A: Go to next step 2. CHECK CAN MS BUS WIRE (MULTIPLEX TILT AND TELESCOPIC ECU) a. Turn the engine switch off. Result Proceed to B2326 is not output A B2326 is output B 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 8 © 2011 Mitchell Repair Information Company, LLC.

Fig. 5: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. b. Disconnect connector E79 from the multiplex tilt and telescopic ECU. c. Measure the resistance according to the value(s) in the table below. Standard resistance NG --> REPAIR OR REPLACE CAN MS BUS BRANCH WIRE OR CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU) Tester Connection Condition Specified Value E79-5 (CANH) - E79-14 (CANL) Engine switch OFF 54 to 69 ohms 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 9 © 2011 Mitchell Repair Information Company, LLC.

OK: Go to next step 3. CHECK HARNESS AND CONNECTOR (IG, GND) a. Measure the resistance according to the value(s) in the table below. Fig. 6: Identifying Multiplex Tilt And Telescopic ECU Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard resistance b. Measure the voltage according to the value(s) in the table below. Tester Connection Condition Specified Value E79-11 (GND) - Body ground Always Below 1 ohms 2011 Lexus ES 350 2011 ACCESSORIES & EQUIPMENT CAN Communication System (Diagnostic Codes & Circuit Tests) - ES350 Thursday, September 18, 2014 11:27:21 AM Page 10 © 2011 Mitchell Repair Information Company, LLC.

2011 Lexus ES350 Service & Repair Manual

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