LS 600h V8-5.0L (2UR-FSE) Hybrid (2008)
NEXT -- Continue to next step.
7. ADJUST, REPAIR OR REPLACE
NEXT -- END
How to Proceed With Troubleshooting
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HOW TO PROCEED WITH TROUBLESHOOTING
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat
belt pretensioner activation.
NOTICE:
-
DTCs for the CAN communication system are as follows: U0073, U0100, U0122, U0123, U0124, U0126, U0127, U0128, U0129, U0130,
U0131, U0132, U0140, U0141, U0142, U0148, U0151, U0155, U0164, U0182, U0199, U0200, U0201, U0202, U0208, U0209, U0210,
U0230, U0235, U0243, U0293, U0327, U1000, U1002, U1004, U1005, U1100, U1101, U1104, U1105, U1106, U1108, U1109, U1110,
U1111, U1112, U1113, U1114, U1115, U1119, U1121, B2427, B2621, and B2624
-
Refer to the troubleshooting procedures of each system if DTCs regarding the CAN communication system are not output.
-
Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the power switch, any switches or doors. If doors
need to be opened in order to check connectors, open the doors and leave them open.
-
After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory
and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-)
battery terminal.
-
When disconnecting the cable, some systems need to be initialized after the cable is reconnected See: Testing and
Inspection/Programming and Relearning/Repair Instruction - Initialization
HINT:
-
Operating the power switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes
resistance variation.
-
*: Use the intelligent tester or Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. CHECK AND CLEAR DTC*
(a) Using the intelligent tester or Techstream, perform the ALL DTC check.
NOTICE:
-
If a CAN communication malfunction code that informs that an ECU or sensor has a power malfunction or interior malfunction is causing a
communication stop, the problem may not be in the communication line. There is a high possibility that the ECU or sensor has a signal
transmission failure. Therefore, first troubleshoot any DTCs related to the ECU or sensor.
-
When CAN communication related connectors are disconnected with the power switch ON (IG or ACC), the ECU related to the connector
and ECUs of related systems will store a CAN communication DTC.
NEXT -- Continue to next step.
4. CHECK INSTALLED SYSTEMS (ECU AND SENSOR) THAT USE CAN COMMUNICATION
(a) Based on the vehicle equipment and specifications, confirm the systems that use CAN communication See: Initial Inspection and
Diagnostic Overview/CAN Communication System/Diagnosis System.
NEXT -- Continue to next step.
5. CHECK ECUS CONNECTED TO CAN BUS (USING INTELLIGENT TESTER OR TECHSTREAM)*
(a) for Intelligent Tester:
(1) Select "CAN BUS CHECK" from the "OBD/MOBD MENU" See: Initial Inspection and Diagnostic Overview/CAN Communication
System/Diagnosis System.
(2) Press "ENTER" on the intelligent tester See: Initial Inspection and Diagnostic Overview/CAN Communication System/Diagnosis
System.
(b) for Techstream:
(1) Select "CAN Bus Check" from the "System Select".
(c) Wait 1 minute and then check the display of the connected ECUs and sensors.