20430 Mariner RETAINER

Illustration 1 g00642017
Schematic for remote accelerator pedal position sensor
Illustration 2 g00642018
Terminal locations for ECMTest Step 1. Inspect Electrical Connectors and Wiring
Connect ET to the cab data link connector. Verify that the parameter for the PTO Configuration is programmed to the "Remote Throttle".
Thoroughly inspect ECM vehicle harness connector J1/P1, the firewall bulkhead connector and the connector for the remote accelerator position sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the remote accelerator position sensor:
J1/P1:68
Check the ECM connector (Allen Head Screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasion and pinch points from the remote accelerator position sensor to the ECM.Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following diagnostic procedure: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 completely coupled.Verify that the repair eliminates the problem. Stop.Test Step 2. Check for Active Diagnostic Codes
Connect ET to the cab data link connector.
Turn the ignition key switch to the ON position.
Monitor the active diagnostic code screen on ET. Check and record active diagnostic codes.Note: When the ECM automatically calibrates new duty cycle values for the low idle throttle position and the high idle throttle position the ECM assumes 22 percent duty cycle at low idle and 75 percent duty cycle at high idle. As a result, you may notice that the PTO throttle position status reaches 100 percent well before the remote PTO accelerator pedal is fully depressed. This is normal. After some cycling of the accelerator pedal to the high idle position, the ECM will adjust the calibration automatically. The ECM will adjust the calibration automatically provided that the high idle stop position is within the 75 to 90 percent duty cycle range, and the low idle is in the 10 to 22 percent duty cycle range. During normal operation, you may notice that more movement of the remote PTO accelerator pedal is required for the PTO throttle position status to increase above 3 percent. You may also observe that the status reaches the 100 percent value prior to the limit of the high idle position. This is done in order to ensure that the accelerator reaches these two critical points for engine operation.Expected Result:Result 1 Diagnostic Code 30-08 or 30-13 is active.Result 2 There are no active diagnostic codes that are related to the accelerator position sensor circuit at this time, but a problem is suspected with operation of the remote PTO acelerator position sensor circuit.Results:
Result 1 - Proceed to Test Step 3.
Result 2 - Proceed to Test Step 3.Test Step 3. Check the Supply Voltage for the Remote Accelerator Position Sensor
Turn the ignition key switch to the ON position.
Measure the voltage at terminal "A" (+12 V) with reference to terminal "B" (sensor common) at the connector J406. This connector is for the remote accelerator position sensor.Expected Result:The measured voltage is between 11.0 VDC and 13.5 VDC.Results:
OK - The voltage is OK. Proceed to Test Step 4.
Not OK - The vehicle wiring or the battery is causing the problem. Repair the wiring or the battery. Replace the wiring or the battery. Perform the repair that is necessary. Verify that the repair has fixed the problem. Stop.Test Step 4. Check the Duty Cycle of the Remote Accelerator Pedal Position Sensor
Turn the ignition key switch to the ON position.
Monitor the duty cycle of the PTO throttle sensor on ET. Access the following display screen in order:
"Service"
"Calibrations"
"Monitor Throttle Position Sensor"Expected Result:The duty cycle is between 10 and 22 percent with the accelerator pedal assembly in the low idle position, and the duty cycle is between 75 and 90 percent with the accelerator pedal assembly in the high idle position.Results:
OK - The remote accelerator position sensor is operating correctly. Proceed to Test Step 5.
Not OK - The remote accelerator position sensor circuit is not operating correctly. Proceed to Test Step 6.Test Step 5. Check the Status of the Power Train Data Link on ET
Start the engine. While the status of the PTO throttle position is being monitored on ET, depress the remote PTO accelerator pedal and release the remote PTO accelerator pedal. The throttle position status and the engine should respond to the change in the accelerator pedal position.
Go to the "System Troubleshooting Settings" portion of ET and turn off the power train data link.
While the status of the PTO throttle position is being monitored on ET, depress the accelerator pedal and release the accelerator pedal. Also depress the accelerator pedal and rel