This instruction show you guide on how to solve Caterpillar C9 Engine trouble code 32-5 646 Turbo Wastegate Solenoid Current Low.
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The Engine Control Module (ECM) detects the following conditions:
-The ECM detects a low current condition (open circuit) in the circuit for the wastegate solenoid for more than 0.12 seconds
- Battery voltage is above 9 V.
-Desired current must be more than 0.2 amp.
This engine utlizes a wastegate control valve that is electronically controlled in order to precisely regulate the boost pressure.The Engine Control Module (ECM) monitors the signal from the boost pressure sensor in order to determine the boost pressure in the intake manifold. The ECM uses this information and other information that is related to the current power demand and the current engine operating conditions in order to determine the optimum position of the wastegate valve at the turbocharger.
The turbocharger’s wastegate valve regulates the amount of exhaust gas that is allowed to bypass the turbine wheel of the turbocharger. This allows the ECM to control the speed of the turbocharger and the boost pressure.
Probable Causes:
1) ECM Connection4) ECM Failure6) Drain orifice plugged
2) Wastegate control solenoid (Can be replaced instead of the entire valve)
3) Harness between the ECM and the wastegate control solenoid
5) Air inlet system restrictions or exhaust system restrictions
