CM850 Electronic Control System – FAULT CODE 352

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Overview

Sensor Supply Voltage Number 1 Circuit OEM Harness SMALL | MEDIUM | LARGE

Sensor Supply Voltage Number 1 Circuit Engine Harness SMALL | MEDIUM | LARGE

Circuit Description

The sensor supply voltage number 1 of the electronic control module (ECM) provides (+) 5 volt supply for the barometric pressure sensor. On engines with a variable geometry turbocharger, this circuit also provides voltage to the turbocharger speed sensor and the turbocharger position sensor on the engine harness. This circuit also includes the return of all the sensors listed above, as well as the engine coolant temperature and recirculated exhaust gas temperature sensor. This +5 volt supply also powers three optional OEM sensors. The three sensors are digital vehicle speed sensor, remote accelerator sensor, and OEM pressure sensor. If these three sensors are not present, the OEM might have wired in other devices which require a +5 volt source.

Component Location

The sensor supply number 1 is located in the ECM. The supply voltage is spliced off in the engine and OEM harness to each sensor it supports.

Shop Talk

Low voltage on the (+) 5 volt supply line can be caused by a short circuit to ground in a supply line, a short circuit between a supply line and a return line, a failed sensor, or a failed ECM power supply.

On-Board Diagnostics (OBD) Information (Euro 4 Certified Engines):

• The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The ECM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. The MIL lamp and fault code can also be cleared using the INSITE™ electronic service tool.
• The fault code will be cleared from memory after 40 consecutive drive cycles where the diagnostic runs and passes.

On-Board Diagnostics (OBD) Information (Euro 4 Stage 1+ Certified Engines):

• The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• An engine torque derate will be activated after 50 hours of engine operation with the fault code active.
• The ECM turns OFF the malfunction indicator lamp (MIL) after 1 ignition cycle that the diagnostic runs and does not fail. The MIL lamp cannot be cleared using the INSITE™ electronic service tool.
• The fault code will be cleared from memory after 400 days or 9600 hours of engine operation.

Refer to Troubleshooting Fault Code t05-352