Possible Causes - Scan Tool Does Not Communicate With Can IHS
WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic will not have Diagnostic Trouble Codes to assist in determining no scan tool communication with the vehicle.
| Possible Causes |
|---|
| FAULTY SCAN TOOL |
| DATA LINK CONNECTOR |
| CAN IHS (+) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN IHS (-) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| POOR CONNECTION |
| STAR CONNECTOR |
| ANY MODULE ON THE CAN IHS BUS |
NORMAL CAN CIRCUIT VOLTAGE TABLE
| CIRCUIT | NORMAL VOLTAGE VALUES |
|---|---|
| CAN IHS (-) | 1.5 - 2.5 volts |
| CAN IHS (+) | 2.5 - 3.5 volts |
| Difference Between CAN IHS (+) and CAN IHS (-) | 0.5 volt |