Component Tests and General Diagnostics

CAN Communication Circuit Check

PROCEDURE

NOTE: When measuring the resistance of CAN communication circuit, measure it in sleep status.
To enter sleep status
- With ignition switch OFF and key or switch operation stopped, keep the doors, trunk, and rear gate all closed for one minute or more.

WIRING DIAGRAM:

LIST

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. 56 - 64 ohms

WIRING DIAGRAM:

NOTE: When the measured resistance value is 56 - 64 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. 55 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 56 - 64 ohms. When the measured resistance value is 55 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. 65 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 56 - 64 ohms. When the measured resistance value is 65 ohms or more, either of end resistance or main wiring harness may have malfunction such as open circuit.