Circuit Inspection
| Inspection Condition | (+) Probe | (-) Probe | Specification | ||
|---|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | ||
|
IBU harness connector | 16 (B-CAN high) | Chassis ground | - | Fig.1 |
| IBU harness connector | 15 (B-CAN low) | Chassis ground | - | ||
|
IBU harness connector | 16 (B-CAN high) | Chassis ground | - | ∞ (infinite)Ω |
| IBU harness connector | 15 (B-CAN low) | Chassis ground | - | ∞ (infinite)Ω | |
| IBU harness connector | 16 (B-CAN high) | ICU harness connector | 16 (B-CAN high) | Approx. below 1Ω | |
| IBU harness connector | 15 (B-CAN low) | ICU harness connector | 15 (B-CAN low) | Approx. below 1Ω | |
| IBU (component side) | 16 (B-CAN high) | IBU (component side) | 15 (B-CAN low) | Approx. 120Ω | |
| ICU (component side) | 16 (B-CAN high) | ICU (component side) | 15 (B-CAN low) | Approx. 120Ω | |
Good
- Disconnect B-CAN communication units one by one and monitor DTC to find the cause.
- If the DTC erase, substitute with a known-good unit and check for proper operation. If the problem is corrected, replace the unit and go to "VERIFICATION OF REPAIR " procedure.
No Good
- Check for open, short to battery/ground in B-CAN line.
- Repair as necessary, go to "VERIFICATION OF REPAIR " procedure.