Diagnosis Item 13: Diagnose the lines between joint connector (CAN2) and joint connector (CAN3)


caution When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.






FUNCTION



TROUBLE JUDGMENT CONDITIONS



TROUBLESHOOTING HINTS



  • Malfunction of the connector [joint connector (CAN2), joint connector (CAN3) or intermediate connector failed]
  • Malfunction of the wiring harness [open circuit between joint connector (CAN2) and joint connector (CAN3)]

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-04 joint connector (CAN2) and C-01 joint connector (CAN3)
caution The strand end of the twist wire should be within 10 cm from the connector. For details refer to .

Q. Is the check result normal?
Go to Step 2.
Repair the defective connector.

STEP 2. Check the wiring harness between C-04 joint connector (CAN2) and C-01 joint connector (CAN3)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .
(1)Disconnect joint connector (CAN2) and joint connector (CAN3), and check the following wiring harness.
(2)Check that there is continuity between C-04 joint connector (CAN2) terminal No.7 and C-01 joint connector (CAN3) terminal No.5 <LHD - CAN_H>
OK: Continuity exists (2 Ω or less)
(3)Check that there is continuity between C-04 joint connector (CAN2) terminal No.6 and C-01 joint connector (CAN3) terminal No.5 <RHD - CAN_H>
OK: Continuity exists (2 Ω or less)
(4)Check that there is continuity between C-04 joint connector (CAN2) terminal No.20 and C-01 joint connector (CAN3) terminal No.16 <LHD - CAN_L>
OK: Continuity exists (2 Ω or less)
(5)Check that there is continuity between C-04 joint connector (CAN2) terminal No.19 and C-01 joint connector (CAN3) terminal No.16 <RHD - CAN_L>
OK: Continuity exists (2 Ω or less)
note Check C-37 intermediate connector, and repair if necessary.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.