3886325 Volvo.Penta Pipe

Table 1
Diagnostic Codes Table    
Code and Description     Conditions which Generate this Code     System Response    
190-2 Engine Speed Sensor : Erratic, Intermittent, or Incorrect     The signal from the engine speed/timing sensor has been lost.
The code is logged only if the engine has been running for three seconds.     The code is logged.
The Electronic Control Module (ECM) will default to the secondary engine speed/timing sensor. If a valid signal is not received from the engine speed/timing sensor the engine will shut down.    
190-3 Engine Speed Sensor : Voltage Above Normal     The supply voltage for the engine speed/timing sensor is above normal.     The code is logged.
The engine will shut down.    
190-7 Engine Speed Sensor : Not Responding Properly     The primary engine speed/timing sensor is connected to the harness connector for the secondary engine speed/timing sensor.     The code is logged.
The engine will shut down.
Check for the correct installation of the sensors.    
190-8 Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period     The signal from the engine speed/timing sensor has been incorrect for at least five seconds.     The code is logged.
The ECM will default to the secondary engine speed/timing sensor. If a valid signal is not received from the engine speed/timing sensor the engine will shut down.    
342-2 Secondary Engine Speed Sensor : Erratic, Intermittent, or Incorrect     The signal from the engine speed/timing sensor has been lost.
The code is logged only if the engine has been running for three seconds.     The code is logged.
The ECM will default to the secondary engine speed/timing sensor. If a valid signal is not received from the engine speed/timing sensor the engine will shut down.    
342-3 Secondary Engine Speed Sensor : Voltage Above Normal     The supply voltage for the engine speed/timing sensor is above normal.     The code is logged.
The engine will shut down.    
342-7 Secondary Engine Speed Sensor : Not Responding Properly     The primary engine speed/timing sensor is connected to the harness connector for the secondary engine speed/timing sensor.     The code is logged.
The engine will shut down.
Check for the correct installation of the sensors.    
342-8 Secondary Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period     The signal from the engine speed/timing sensor has been incorrect for at least five seconds.     The code is logged.
The ECM will default to the secondary engine speed/timing sensor. If a valid signal is not received from the engine speed/timing sensor the engine will shut down.    The engine uses two engine speed/timing sensors. The ECM measures the time between the pulses that are created by the sensors as the gears rotate in order to determine rpm.Under normal operation, the secondary engine speed/timing sensor is used to determine timing for starting purposes. The secondary engine speed/timing sensor is used to determine when the piston in the No. 1 cylinder is at the top of the compression stroke. When the timing has been established, the primary engine speed/timing sensor is then used to determine engine speed and the signal from the secondary camshaft sensor is ignored.After locating the No. 1 cylinder, the ECM triggers each injector in the correct firing order and at the correct unit injector timing. The actual timing and duration of each injection is based on engine rpm and load. If the engine is running and the signal from the primary engine speed/timing sensor is lost, a slight change in engine performance will be noticed when the ECM performs the changeover to the secondary engine speed/timing sensor. Loss of the signal from the secondary engine speed/timing sensor during engine operation will not result in any noticeable change in engine performance. However, if the signal from the secondary engine speed/timing sensor is not present during start-up the following conditions may exist:
The engine may require a slightly longer period of time to start-up.
The engine may run rough for a few seconds until the ECM determines the proper firing order by using the primary engine speed/timing sensor only.The engine will start and the engine will run when only one sensor signal is present from either of the sensors. The loss of the signal from both of the sensors during engine operation will result in the termination of injection and the shutting down of the engine by the ECM. The loss of the signal from both of the sensors during start-up will prevent the engine from starting.Both sensors are magnetic sensors with an integral connector. The two sensors are not interchangeable. Do not switch the positions of the sensor. If the sensors are replaced, a timing calibration is not necessary for the engine.Note: When the sensors are being installed, complete all of the following tasks:
Ensure that an O-ring is installed on each sensor. If an O-ring is damaged or missing, replace the O-ring.
Lubricate the O-rings with oil.
Ensure that the sensor is fully seated into the engine before tightening the bracket bolt.
Ensure that each electrical connector is latched on both sides.
Ensure that the harness is properly secured, and ensure that each tie-wrap is placed in the correct location.
Illustration 1 g01429270
Schematic for the engine speed/timing sensorsTest Step 1. Check for Diagnostic Codes
Connect the Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Restore electrical power to the ECM.
Start the engine and run the engine. The problem may occur when the engine is at any operating temperature. However, the problem is more likely to occur when the engine is at the normal operating temperature.
If the engine will not start, monitor the engine speed on Cat ET while the engine is being cranked. Cat ET may need to be powered from another battery while the engine is being cranked. This is done so that Cat ET will not reset.Note: Upon initial cranking, the status for engine speed may indicate that the engine speed signal is abnormal. This message should be replaced with an engine speed once the ECM is able to calculate a speed from the signal.
Look for one of