DIAGNOSTIC ITEM 21: Diagnose When The Scan Tool Cannot Receive The Data Sent By CAN Box Unit: Diagnosis
WARNING: This page is about a different variant/trim than selected.
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- STEP 1. Check joint connector (CAN1) C-105, CAN box unit connector C-15 and intermediate connector C-108 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. For details refer to SERVICE PRECAUTIONS .
Q: Are joint connector (CAN1) C-105, CAN box unit connector C-15 and intermediate connector C-108 in good condition?
- YES: Go to Step 2.
- NO: Repair the damaged parts.
- STEP 2. Check the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 for open circuit. CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to SERVICE PRECAUTIONS .
- Disconnect joint connector (CAN1) C-105 and CAN box unit connector C-15, and check the wiring harness.
- Check the wiring harness between joint connector (CAN1) C-105 (terminal 8) and CAN box unit connector C-15 (terminal 8)
OK: Continuity exists (2 Ω or less)
- Check the wiring harness between joint connector (CAN1) C-105 (terminal 19) and CAN box unit connector C-15 (terminal 9)
OK: Continuity exists (2 Ω or less)
Q: Is the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15 in good condition?
- YES: Check the power supply circuit of the CAN box unit. Refer to TROUBLE SYMPTOM CHART .
- NO: Repair the wiring harness between joint connector (CAN1) C-105 and CAN box unit connector C-15.