Diagnosis Item 11: Diagnose when the M.U.T.-III cannot receive the data sent by A/T-ECU <1500> or CVT-ECU <1800, 2000-PETROL>


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 JUDGEMENT CONDITIONS



TROUBLESHOOTING HINTS



  • Malfunction of the connector [joint connector (CAN3) or A/T-ECU <1500> or CVT-ECU <1800, 2000-Petrol (except for RALLIART)> improperly connected]
  • Malfunction of the wiring harness [open circuit between the A/T-ECU <1500> or CVT-ECU <1800, 2000-Petrol (except for RALLIART)> and the joint connector (CAN3), power supply circuit to the A/T-ECU <1500> or CVT-ECU <1800, 2000-Petrol (except for RALLIART)>]
  • Malfunction of the A/T-ECU <1500> or CVT-ECU <1800, 2000-Petrol (except for RALLIART)>

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-124 joint connector (CAN3) and C-32 A/T-ECU connector <1500> or C-35 CVT-ECU connector <1800, 2000-Petrol (except for RALLIART)>
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-32 A/T-ECU connector <1500> or C-35 CVT-ECU connector <1800, 2000-Petrol (except for RALLIART)> and C-124 joint connector (CAN3)
caution Strictly observe the specified wiring harness repair procedure. For details refer to .
Disconnect shift lever connector and joint connector (CAN3), and check the following wiring harness for open circuit.
(1)The wiring harness between C-32 A/T-ECU <1500> or C-35 CVT-ECU <1800, 2000-Petrol (except for RALLIART)> connector terminal No.4 and C-124 joint connector (CAN3) terminal No.7 <CAN_H>
OK: Continuity exists (2 Ω or less)
(2)The wiring harness between C-32 A/T-ECU <1500> or C-35 CVT-ECU <1800, 2000-Petrol (except for RALLIART)> connector terminal No.5 and C-124 joint connector (CAN3) terminal No.20 <CAN_L>
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Check the power supply circuit of the CVT-ECU <1800, 2000-Petrol (except for RALLIART)> or A/T-ECU <1500>. Refer to GROUP 23A - Troubleshooting <CVT> GROUP 23C - Troubleshooting <A/T>.
Repair the wiring harness.