Diagnostic Item 8

DIAGNOSTIC ITEM 8: Diagnose When The Scan Tool Cannot Receive The Data Sent By Shift Lever. [TC-SST]

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 [TC-SST]:

FUNCTION
If the scan tool MB991958 cannot communicate with the shift lever, this diagnosis result will be set.

TROUBLE JUDGMENT CONDITIONS
If a communication flag is not set for the shift lever, the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINTS
- Malfunction of the connector [joint connector (CAN3) or shift lever connector improperly connected]
- Malfunction of the wiring harness [open circuit between the shift lever and the joint connector (CAN3), power supply circuit to the shift lever]
- Malfunction of the shift lever

DIAGNOSIS

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

STEP 1. Check joint connector (CAN3) C-127 and shift lever connector C-27 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 (CAN3) C-127 and shift lever connector C-27 in good condition?

YES : Go to Step 2.

NO : Repair the damaged parts.

STEP 2. Check the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27.

CAUTION: Strictly observe the specified wiring harness repair procedure.

1. Disconnect joint connector (CAN3) C-127 and shift lever connector C-27, and check the wiring harness.







2. Check the wiring harness between joint connector (CAN3) C-127 (terminal 7) and shift lever connector C-27 (terminal 2)

OK: Continuity exists (2 ohms or less)







3. Check the wiring harness between joint connector (CAN3) C-127 (terminal 20) and shift lever connector C-27 (terminal 1)

OK: Continuity exists (2 ohms or less)

Q: Is the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27 in good condition?

YES : Check the power supply circuit of the shift lever. Refer to Troubleshooting [shift lever]. Diagnostic Trouble Code Descriptions

NO : Repair the wiring harness between joint connector (CAN3) C-127 and shift lever connector C-27.