When Monitored And Set Conditions
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
This procedure diagnoses the CAN Bus circuits between the Data Link Connector (DLC) and the Security Gateway (SGW) Module.
NOTE:
If the vehicle does not operate properly and the scan tool does not communicate on a CAN Bus, perform the appropriate Body Control Module (BCM) CAN BUS OFF, CAN BUS MISSING MESSAGE or CAN BUS NO SIGNAL U-code diagnostic procedure for the CAN Bus being diagnosed. Refer to DIAGNOSTIC CODE INDEX .
NOTE:
The CAN Bus names may also be known as:
- CAN C1 or CAN C
- CAN C2 or CAN CH
- CAN IHS, CAN BH or CAN B
This condition will not display any Diagnostic Trouble Codes (DTCs).
Default Actions:
- The vehicle will operate normally.
| Possible Causes |
|---|
| INOPERATIVE SCAN TOOL |
| POOR TERMINAL CONTACT OR CONNECTOR CONNECTION(S) |
| DATA LINK CONNECTOR (DLC) |
| DLC FUSED B (+) CIRCUIT OPEN OR HIGH RESISTANCE |
| DLC GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| CAN C1 BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C2 BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN IHS BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C1 (+) AND (-) BUS CIRCUITS SHORTED TOGETHER |
| CAN C2 (+) AND (-) BUS CIRCUITS SHORTED TOGETHER |
| CAN IHS (+) AND (-) BUS CIRCUITS SHORTED TOGETHER |
| SECURITY GATEWAY (SGW) MODULE |
NORMAL CAN C1 AND C2 BUS VOLTAGE TABLE
| CIRCUIT | NORMAL VOLTAGE VALUES |
|---|---|
| CAN C1/C2 (-) | 1.5 - 2.5 volts |
| CAN C1/C2 (+) | 2.5 - 3.5 volts |
| Difference Between CAN C1/C2 (+) and CAN C1/C2 (-) | 0.5 volt |
NORMAL CAN IHS BUS 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 |