Open in One Side of CAN Branch Line
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM (w/ Smart Key System): Open in One Side of CAN Branch Line
- Open in One Side of CAN Branch Line
DESCRIPTION
If 2 or more ECUs and/or sensors do not appear on the Techstream "Bus Check" screen, one side of the CAN branch wire may be open (one side of the CANH [CAN branch wire]/CANL [CAN branch wire] of the ECU and/or sensor is open).
* *: w/ Navigation System
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* Perform the following inspection for the ECUs (sensors) which are displayed on the Techstream. If a malfunction cannot be identified, perform the following inspections for the ECUs (sensors) connected to the CAN communication system.
* Do not remove the combination meter assembly and ECM as they are the end parts of the circuit. If removed, CAN communication will not be possible.
* The open circuit confirmation of the combination meter assembly, ECM and main wire is performed in the Check CAN Bus Line procedure of "How to Proceed with Troubleshooting". This inspection only has procedures for checking for an open circuit on one side of a CAN branch wire.
PROCEDURE
1. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU ASSEMBLY)
(a) Disconnect the A44 skid control ECU assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR)
A -- Continue to next step.
2. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY)
OK -- REPLACE SKID CONTROL ECU ASSEMBLY Removal
3. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR)
(a) Disconnect the D14 steering angle sensor connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (YAW RATE SENSOR ASSEMBLY)
A -- Continue to next step.
4. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR)
OK -- REPLACE STEERING ANGLE SENSOR Removal
5. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (YAW RATE SENSOR ASSEMBLY)
(a) Disconnect the O6 yaw rate sensor assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (NAVIGATION RECEIVER ASSEMBLY)
A -- Continue to next step.
6. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (YAW RATE SENSOR ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (YAW RATE SENSOR ASSEMBLY)
OK -- REPLACE YAW RATE SENSOR ASSEMBLY Removal
7. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (NAVIGATION RECEIVER ASSEMBLY)
NOTICE:
For vehicles without a navigation system, go to "Check for Open in One Side of CAN Branch Wire (Center Airbag Sensor Assembly)".
(a) Disconnect the E25 navigation receiver assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR ASSEMBLY)
A -- Continue to next step.
8. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (NAVIGATION RECEIVER ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (NAVIGATION RECEIVER ASSEMBLY)
OK -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal
9. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR ASSEMBLY)
(a) Disconnect the D30 center airbag sensor assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU)
A -- Continue to next step.
10. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY)
OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal
11. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU)
(a) Disconnect the D9 main body ECU (instrument panel junction block assembly) connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
A -- Continue to next step.
12. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (MAIN BODY ECU)
OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
13. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
(a) Disconnect the D37 air conditioning amplifier assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (ECM)
A -- Continue to next step.
14. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY)
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal
15. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (ECM)
(a) Disconnect the A67 ECM connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (POWER STEERING ECU ASSEMBLY)
A -- Continue to next step.
16. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (ECM CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (ECM)
OK -- REPLACE ECM Removal
17. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (POWER STEERING ECU ASSEMBLY)
(a) Disconnect the D6 power steering ECU assembly connector.
(b) Select "Bus Check" on the Techstream Diagnosis System.
Result
B -- CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (BUS BUFFER ECU CAN BRANCH WIRE)
A -- Continue to next step.
18. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (POWER STEERING ECU ASSEMBLY CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (POWER STEERING ECU ASSEMBLY)
OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal
19. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (BUS BUFFER ECU CAN BRANCH WIRE)
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the CAN main wire and CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
(b) Disconnect the D50 bus buffer ECU (accessory gateway) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (BUS BUFFER ECU)
OK -- REPLACE BUS BUFFER ECU (ACCESSORY GATEWAY)