Circuit Inspection
| Inspection Condition | (+) Probe | (-) Probe | Specification | ||
|---|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | ||
|
IBU connector | 35 (P-CAN high) | Chassis ground | - | Fig. 1 |
| IBU connector | 36 (P-CAN low) | Chassis ground | - | ||
|
IBU connector | 35 (P-CAN high) | Chassis ground | - | ∞ (infinity)Ω |
| IBU connector | 36 (P-CAN low) | Chassis ground | - | ∞ (infinity)Ω | |
| IBU connector | 35 (P-CAN high) | ICU connector | 12 (P-CAN high) | Approx. below 1Ω | |
| IBU connector | 36 (P-CAN low) | ICU connector | 11 (P-CAN low) | Approx. below 1Ω | |
| IBU connector | 35 (P-CAN high) | IBU connector | 36 (P-CAN low) | Approx. 60Ω | |
| ICU (component side) | 12 (P-CAN high) | ICU (component side) | 11 (P-CAN low) | Approx. 120Ω | |
| ECM (component side) (1.6T-GDI) | 85 (P-CAN high) | ECM (component side) (1.6T-GDI) | 63 (P-CAN low) | ||
| PCM (component side) (2.0MPI ATKINSON) | 77 (P-CAN high) | PCM (component side) (2.0MPI ATKINSON) | 60 (P-CAN low) | ||
Good
- Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
- Repair or replace as necessary and go to "Verification of Repair " procedure.
No Good
- If the measured value is battery voltage, check short to battery in CAN line. Repair or replace as necessary. And then, go to "Verification of Repair " procedure. In case that communication is in sleep mode, 12V will be measured. Therefore, check that communication is in wake up status.
- If 0V is detected, check short to ground, short between CAN high and low each other or open in CAN high or CAN low harness. Repair or replace as necessary and then, go to "Verification of Repair " procedure.