Inspection

CAN Communication Circuit Check

INSPECTION

1. GROUND SHORT INSPECTION

WIRING DIAGRAM:

NOTE: Main wiring harness or related lines may be shorted to ground, or shorted to ground in one of the control modules.

2. BATTERY SHORT INSPECTION

WIRING DIAGRAM:

NOTE: Main wiring harness or related lines may be shorted to battery circuit, or shorted to battery circuit in one of the control modules.

3. 53 - 61 ohms

WIRING DIAGRAM:

NOTE: When the measured resistance value is 53 - 61 ohms, main wiring harness or related lines may be shorted to ground, or shorted to power supply line, or related line may be open.

4. 52 ohms OR LESS

WIRING DIAGRAM:

NOTE: When the bus line is measured, combined resistance of end resistance (120 ohms) in ECM and end resistance (120 ohms) in VDC CM can be measured. The combined resistance is approximately 53 - 61 ohms with the stabilizing circuit included. When the measured resistance value is 52 ohms or less, main wiring harness or related lines may be shorted, or combined resistance may have changed because resistance other than end resistance is created on the circuit.

5. 62 ohms OR MORE

WIRING DIAGRAM:

NOTE: When CAN communication circuit is measured, combined resistance of end resistance (120 ohms) in ECM and end resistance (120 ohms) in VDC CM can be measured. The combined resistance is approximately 53 - 61 ohms with the stabilizing circuit included. When the measured resistance value is 62 ohms or more, either one of the end resistances, or stabilizing circuit, or main wiring harness may have malfunction such as open circuit.