40001134 Mercury SCREW

Using The ECAP To Display Active Codes:
A. With power switch(es) OFF, install an ECAP into the PEEC system.B. Turn power switch(es) ON or start engine.C. Refer to the Operating Manual and Special Instructions for the service tool (listed under PEEC Service Tools) to read the diagnostic code(s). On the ECAP, the display menu will direct you to the proper screen to display diagnostic messages.Logged Diagnostic Codes
When the ECM generates a diagnostic code, it usually logs the code in permanent memory within the personality module. The time the code occurred (in hours on the internal diagnostic clock) is logged along with the code. The logged codes can then be later retrieved or erased using an ECAP service tool. They can be a valuable indicator when troubleshooting intermittent problems.PEEC must be out of Cold Mode at least ten seconds before logging will begin. In addition, PEEC must see the conditions go from GOOD to BAD before the code is logged (but any code that is ACTIVE when logging begins is permanently logged).When investigating LOGGED diagnostic codes, keep in mind:* Some codes may be sensitive, and may log occurrences that did not result in complaints. If the time the code was logged does NOT correlate to a complaint, there may be nothing to fix.* The most likely cause of an intermittent problem is connections or damaged wiring. Next likely is the component (sensor or BTM, for instance). Least likely is the ECM itself.* Some codes represent "events", not failures. These codes are Diagnostic Code 35 (Engine Overspeed Warning), Diagnostic Code 46 (Low Oil Pressure Warning), or Diagnostic Code 48 (Excessive Engine Power).* Diagnostic Codes logged repeatedly may indicate a problem that needs investigation, while codes logged only a few times may be ignored.* Some diagnostic codes are not intentionally logged. Any occurrence of these codes would be caused by voltage spikes in the system wiring. Voltage spikes can scramble the memory used by the Personality Module. In this case, isolate the cause of the spike (typically solenoids or relay coils), and inhibit the spike by installing a diode across the coil.To troubleshoot a logged diagnostic code, refer to the procedure in this manual for troubleshooting the specific code first (see Section 3: Troubleshooting Diagnostic Codes). If symptoms continue, use the procedure for troubleshooting symptoms (see Section 4: Troubleshooting Without A Diagnostic Code).Diagnostic Code 21 Sensor Supply Voltage Fault
Conditions Which Generate This Code:The ECM detects a fault in the 8 volt sensor supply circuit. The ECM also uses the 8 volt sensor supply for its internal circuits. Therefore, if the 8 volt sensor supply is shorted to ground, the ECM becomes inoperative and is unable to detect the short circuit. System Response:1. The code is current (Diagnostic Lamp or ECAP) and is LOGGED in memory.2. The rack and timing BTMs and the shutoff solenoid are disabled. The engine will be shut down. Troubleshooting:Follow P-221: Sensor Supply Voltage Test, in this manual.Diagnostic Code 22 Rack Position Sensor Fault
Conditions Which Generate This Code:1. The ECM reads a rack sensor signal of less than 0.3 volts or more than 5.0 volts. -OR-2. The ECM reads a rack sensor signal that is fluctuating at a rate greater than the rack can physically move.3. The above conditions are met for 10 seconds. System Response:1. The code is current (Diagnostic Lamp or ECAP) and is LOGGED in memory. -AND-2. PEEC sets a maximum Desired Rack of 8.0 mm. This results in a loss of engine power. -AND-3. PEEC sets actual rack to desired rack. -AND-4. PEEC uses only engine speed to govern the engine (it ignores the rack sensor signal for governing). Troubleshooting:Follow P-231: Rack Position Sensor Test, in this manual.Diagnostic Code 24 Oil Pressure Sensor Fault
Conditions Which Generate This Code:1. The ECM reads an oil pressure signal of less than 1.53 volts. -OR-2. The ECM reads an oil pressure signal that is fluctuating at a rate faster than the oil pressure can fluctuate.3. The above conditions are met for four seconds. System Response:1. The code is current (Diagnostic Lamp or ECAP) and is LOGGED in memory. Troubleshooting:Follow P-225: Oil Pressure Sensor Test, in this manual.Diagnostic Code 25 Boost Pressure Sensor Fault
Conditions Which Generate This Code:1. The ECM reads a boost sensor signal of less than 0.75 volts. -OR-2. The ECM reads a boost sensor signal of 5.0 volts or more. -OR-3. The ECM determines that the boost pressure value is not in an expected range for a given engine speed and rack position. -OR-4. The above conditions are met for 40 seconds. System Response:1. The code is current (Diagnostic Lamp or ECAP) and is logged in memory. -AND-2. For condition 1 above: boost pressure is set to 0 kPa (0 psi). This will limit rack due to the Fuel Ratio Control rack limit, which will result in low power. -AND-3. For condition 2 above: boost pressure is set to 575 kPa (83.4 psi) and the FRC rack limit is removed. Troubleshooting:Follow P-224: Boost Pressure Sensor Test, in this manual.Diagnostic Code 26 Atmospheric Pressure Sensor Fault
Conditions Which Generate This Code:The ECM reads an atmospheric pressure sensor signal of less than 0.75 volts or more than 5.0 volts DC. System Response:1. The code is current (Diagnostic Lamp or ECAP) and is logged in memory.2. Atmospheric pressure is set to 0 kPa (0 psi). TroubleshootingFollow P-226, Atmospheric Pressure Sensor Test, in this manual.Diagnostic Code 27 Coolant Temperatue Sensor Fault
Conditions Which Generate This Code:The Electronic Control Module (ECM) detects a Coolant Temperature Sensor signal voltage below 0.3 volts DC or above 4.7 volts DC for at least four seconds. System Response:1. The coolant temperature is artificially set to 0°C (32°F) by the ECM, which takes the system out of Cold Mode.2. The code is current (Diagnostic Lamp or ECAP) and is LOGGED in memory. Troubleshooting:Follow P-226: Coolant Temperature Sensor Test in this manual.Diagnostic Code 32 Throttle Control Sensor Fault
Conditions Which Generate This Code:1. The ECM reads throttle position signal that is less than 150 Hz or more than 1200 Hz (typical