Engine Brake Supply Circuit
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Overview
CODE | REASON | EFFECT |
Fault Code: 393 PID: S082 SPN: 1112 FMI: 11/11 LAMP: Yellow SRT: |
Less than (+) 6-VDC detected at engine brake circuit 3 when on; this indicates an excessive current draw from the ECM or a faulty ECM output circuit. |
The engine brakes can |
![]() Engine Brake Relay Supply Circuit
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Circuit Description
The ECM enables the engine brake by sending a signal directly to the engine brakes. The ECM will
only enable the engine brakes under certain operating conditions.
Component Location
The engine brakes are located under the valve cover.
Shop Talk
Possible cause for this fault code:
- ECM engine brake circuit 3 has a short circuit to ground.
Refer to Troubleshooting Fault Code t05-393.
Last Modified: 26-Oct-2010