Diagnostic Item 11

DIAGNOSTIC ITEM 11: Diagnose when the scan tool cannot receive the data sent by transaxle assembly (TC-SST-ECU). [RALLIART]

CAUTION: When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.

CAN-C Communication Circuit [RALLIART] (Part 1):

CAN-C Communication Circuit [RALLIART] (Part 2):

FUNCTION

If the scan tool MB991958 cannot communicate with the transaxle assembly (TC-SST-ECU), this diagnosis result will be set.

TROUBLE JUDGEMENT CONDITIONS

If a communication flag is not set for the transaxle assembly (TC-SST-ECU), the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINTS

- Malfunction of the connector [joint connector (CAN4), transaxle assembly (TC-SST-ECU) connector improperly connected]
- Malfunction of the wiring harness [open circuit between the transaxle assembly (TC-SST-ECU) connector and the joint connector (CAN4), power supply circuit to the transaxle assembly (TC-SST-ECU)]
- Malfunction of the transaxle assembly (TC-SST-ECU)

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CAUTION: The strand end of the twisted wire should be within 10 cm (4 inches) from the connector.

Q: Are joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-150 in good condition?

YES : Go to Step 2.

NO : Repair the damaged parts.

STEP 2. Check the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 for open circuit.

CAUTION: Strictly observe the specified wiring harness repair procedure.

1. Disconnect joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) B-120, and check the wiring harness.







2. Check the wiring harness between joint connector (CAN4) A-55 (terminal 7) and transaxle assembly (TC-SST-ECU) connector B-120 (terminal 5)

OK: Continuity exists (2 ohm or less)







3. Check the wiring harness between joint connector (CAN4) A-55 (terminal 20) and transaxle assembly (TC-SST-ECU) connector B-120 (terminal 2)

OK: Continuity exists (2 ohm or less)

Q: Is the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120 in good condition?

YES : Check the power supply circuit of the transaxle assembly (TC-SST-ECU). Refer to Diagnosis [TC-SST]. Diagnostic Trouble Code Descriptions

NO : Repair the wiring harness between joint connector (CAN4) A-55 and transaxle assembly (TC-SST-ECU) connector B-120.