CAN Communication Line Inspection

WARNING: This page is about a different car, the 2013 Kia Sportage and 2012 Kia Sportage. However, it is still accessible from the selected car via links, so may be relevant.

■ Check short to battery in CAN communication line.

IG Key "OFF".
Disconnect PCM, 4WD ECU and ABS connector.
IG KEY OFF
Measure voltage between CAN high terminal (# 3) of diagnostic connector and chassis ground.
Measure voltage between CAN low terminal (#11) of diagnostic connector and chassis ground.
Specification: About 0V

■ Check short to ground in CAN communication line

IG KEY OFF.
Disconnect PCM, 4WD ECU and ABS connector.
Measure resistance between CAN high terminal (# 3) of diagnostic connector and chassis ground.
Measure resistance between CAN low terminal (# 11) of diagnostic connector and chassis ground.
Specification: ∞ Ω

Fig 1: Measuring Resistance Between CAN Low/High Terminals (# 11)/(# 3) Of Diagnostic Connector & Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: TPMS, Data Link Connector, ABS & PCM Connector End Views
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured value within specification?
YES
- Check PCM, 4WD ECU and ABS ECM connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check short to battery in communication line. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check short to ground in communication line. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.