875121 Volvo.Penta Splined sleeve

Table 1
Diagnostic Trouble Codes
J1939 Code and Description Conditions that Generate the Code System Response
29-2 Accelerator Pedal Position 2 : Erratic, Intermittent, or Incorrect The Electronic Control Module (ECM) detects an erratic signal in the circuit for the #2 throttle position sensor. The code is logged.
29-3 Accelerator Pedal Position 2 : Voltage Above Normal The ECM detects a voltage that is above normal in the circuit for the #2 throttle position sensor. The code is logged.
29-4 Accelerator Pedal Position 2 : Voltage Below Normal The ECM detects a voltage that is below normal in the circuit for the #2 throttle position sensor. The code is logged.
29-8 Accelerator Pedal Position 2 : Abnormal Frequency, Pulse Width, or Period The ECM detects an incorrect frequency or an incorrect duty cycle in the circuit for the #2 throttle signal. The engine speed is limited to low idle.
The code is logged.
91-2 Accelerator Pedal Position 1 : Erratic, Intermittent, or Incorrect The ECM detects an erratic signal in the circuit for the #1 throttle position sensor. The code is logged.
91-3 Throttle Position Sensor : Voltage Above Normal The ECM detects a voltage that is above normal in the circuit for the #1 throttle position sensor. The code is logged.
91-4 Throttle Position Sensor : Voltage Below Normal The ECM detects a voltage that is below normal in the circuit for the #1 throttle position sensor. The code is logged.
91-8 Throttle Position Sensor : Abnormal Frequency, Pulse Width, or Period The ECM detects an incorrect frequency or an incorrect duty cycle in the circuit for the #1 throttle signal. The engine speed is limited to low idle.
The code is logged. The throttle position sensors provide the throttle signal to the ECM.Each throttle position sensor allows the operator to control the speed of the engine. The geometry of the throttle assembly controls both the travel of the sensor and the range of the output signal. The throttle position sensors cannot be adjusted.The ECM recognizes the signal from the throttle position sensor according to the strategy that is set up in the configuration parameters. Refer to Troubleshooting, "Configuration Parameters" for details that relate to the current throttle strategy settings.The output from the throttle position sensor is a PWM signal that varies with the position of the throttle assembly. The throttle position sensor produces a minimum duty cycle in the released position and a maximum duty cycle in the fully actuated position. When the sensor is released, the ECM translates the sensor output signal to a throttle position of 0 percent. When the sensor is fully actuated, the ECM translates the output signal to a throttle position of 100 percent.The throttle position sensor is powered by 8.0 0.4 VDC that is provided by the ECM. A digital return for the sensor is also provided by the ECM.The ECM uses an automatic calibration function that allows the ECM to minimize the deadband of the sensor. The automatic calibration function assumes a range of PWM duty cycle at powerup. If the duty cycle of the sensor exceeds this initial range, the automatic calibration adjusts the limits to adjust for the new range.
Illustration 1 g02160270
Schematic for throttle position sensors
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g02133295
Location of the J1/P1 ECM connectors (typical engine view)
(1) J1/P1 ECM connectors
Thoroughly inspect ECM connectors (1). Also, thoroughly inspect the connector for the throttle position sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g02160290
Terminal locations at the P1 ECM connector for the throttle position sensor
(P1-1) Throttle position
(P1-4) 8 V supply
(P1-5) Digital return
(P1-66) Throttle position
Illustration 4 g02137756
Terminal locations for the throttle position sensor (typical example)
(Terminal 1) 8 V supply
(Terminal 2) Digital return
(Terminal 3) Throttle position
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector and the connector for the throttle position sensor.
Check the allen head screw from each ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque value.
Check the harness and the wiring for abrasion and for pinch points. Expected Result:All of the connectors, pins, and sockets are coupled and/or inserted and the wiring is free of corrosion, of abrasion, and pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are not OK.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Inspect the Throttle Assembly
Inspect the throttle assembly for components that are loose, bent, missing, or worn.
Slowly actuate the throttle and release the throttle. Expected Result:The throttle assembly operates smoothly without excessive drag. The throttle assembly springs back smoothly to the low idle position without assistance.Results:
OK - The throttle assembly functions properly. The throttle assembly is OK. Proceed to Test Step 3.
Not OK - The throttle assembly is in poor repair.Repair: There is excessive drag or improper operation of the throttle assembly. Repair the throttle assembly or replace the throttle assembly, as required.STOPTest Step 3. Check the Status for "Throttle Position" on Caterpillar Electronic Technician (ET)
Connect the Cat ET to the service tool connector.
Turn the keyswitch to the ON position.
Observe the status for either "Throttle Position" or "Throttle #2 Position" on Cat ET. Operate the throttle through the entire range of travel. Expected Result:The status is zero percent when the throttle is released. The status progressively increases to 100 percent when the throttle is fully actuated.Results:
OK - The throttle position sensor is working properly.Repair: The original problem seems to be resolved. There may be an intermittent electrical problem with the harness or the connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" if the problem is intermittent.STOP
Not OK - The throttle position that is displayed on Cat ET is questionable. Proceed to Test Step 4.Test Step 4. Check the Supply Volt