Exhaust System Check
Exhaust System CheckDescription
The exhaust brake system consists the exhaust brake valve, exhaust brake magnetic valve, the exhaust brake switch, relays and ECM. The exhaust brake valve is opened or closed by the exhaust brake magnetic valve. If exhaust brake switch is turned ON and conditions of the vehicle are satisfied, the ECM turn ON the exhaust brake control relay and the exhaust brake magnetic valve. And then the vacuum is supplied to the exhaust brake valve, and it is closed.
Conditions of Exhaust Brake Operation
- The exhaust brake switch is ON.
- The vehicle speed is higher than 5MPH (8.0km/h): M/T
- The accelerator pedal is not pressed.
- The brake pedal is not pressed.
- The clutch pedal is not pressed.
- When the TCM is lock up, shift up and shift down control , Exhaust brake is OFF. Vehicle speed is higher than 30 MPH (48km/h): A/T
Schematic Reference: Engine Controls Schematics
Step 1 - 4:
Step 5 - 12:
Step 13 - 15:
Step 16 - 20:
Step 21 - 24:
