10237082 Mercury OPERATION MANUAL, 225/250/275/300 Verado

Table 1
Diagnostic Codes Table    
Code    Conditions which Generate this Code    System Response    
261-13 Engine Timing Calibration : Calibration Required     The engine speed/timing sensor has not been calibrated.     This will not keep the engine from running. The fuel injection timing may be out of adjustment.    The engine speed/timing sensor provides information to the ECM by generating pulse signals as the timing reference ring rotates past the magnetic pickup on the sensor. A unique tooth on the timing reference ring passes by the engine speed/timing sensor. The engine speed/timing sensor provides a frequency that is directly proportional to engine speed (rpm). The engine speed/timing sensor produces a duty cycle output. This duty cycle provides the ECM with information on the crankshaft position.Timing calibration is accomplished by installing a magnetic transducer into the side of the engine block and performing the "Timing Calibration" on Caterpillar Electronic Technician (ET). The transducer senses a special slot on the crankshaft counterweight. The transducer is connected to the ECM through a connector in the harness. The connector is located near the ECM on the engine harness.Check for active diagnostic codes and/or for logged diagnostic codes. Troubleshoot any diagnostic codes that are present before continuing with this procedure.
Illustration 1 g01410028
Installation of the TC probe (1) Notch (2) Crankshaft counterweight (3) Transducer adapter (4) O-ring (5) Timing calibration probe (6) Engine block (rear view) (A) Air gap 1 mm (0.04 inch)
Table 2
Required Special Tools    
Part Number    Description    
6V-2197     Magnetic Transducer (Timing Calibration Probe)    
7X-1695     Cable (Timing Calibration)    
7X-1171     Transducer Adapter    
9S-9082     Engine Turning Tool    
Install the 7X-1171 Transducer Adapter ..
Turn the keyswitch to the OFF position.
Use the 9S-9082 Engine Turning Tool to put either the No. 1 piston or the No. 6 piston at top center. Refer to Systems Operation/Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for the correct procedure. After the top center position has been located, rotate the engine in the opposite direction of the correct engine rotation for 60 degrees.Note: Normal engine rotation is counterclockwise as the engine is viewed from the flywheel end.
Illustration 2 g01510397
Typical engine view (right side) (7) Timing calibration port
Remove the timing calibration plug. The plug is located in the No. 5 cylinder rod pocket on the right side of the cylinder block. Refer to Illustration 2.
Install the 7X-1171 Transducer Adapter into the hole for the plug.
Install the 6V-2197 Timing Calibration Probe on the Engine.
If the crankshaft is not in the correct position when the 6V-2197 Timing Calibration Probe is installed, the probe will be damaged when the engine is started.
Put the 2D-6392 O-Ring Seal on the end of the timing calibration probe.Note: A small amount of clean engine oil will allow the seal to slide onto the sensor more easily.
Push the transducer through the 7X-1171 Transducer Adapter until the transducer contacts the outermost portion of the crankshaft counterweight. Move the O-ring seal downward against the adapter.
Withdraw the probe 1.0 mm (0.04 inch) and hand tighten the nut on the adapter sleeve in order to secure the probe in place. Move the O-ring seal downward against the adapter.
Connect the 6V-2197 Timing Calibration Probe to the 7X-1695 Cable .
Illustration 3 g01510413
Typical engine view (left side) (8) Timing calibration connector
Connect the 7X-1695 Cable to the timing calibration probe connector that is located near the ECM. Refer to Illustration 3.
Start the Engine and Allow the Coolant to Reach Operating Temperature.
Connect Cat ET to the service tool connector.
Start the engine and run at low idle until the engine is at the correct operating temperature.
Check for active diagnostic codes. Use the procedures in this manual for troubleshooting any active diagnostic codes before you proceed. The engine must not have any diagnostic conditions that are present during the timing calibration except the following condition:
261-13
Calibrate the Timing.
After the engine has reached the correct operating temperature, set the engine speed to 1100 50 rpm.The engine speed must be steady within this rpm range in order to successfully perform a timing calibration.
After the engine has warmed up, access the "Timing Calibration" screen on Cat ET. Access the following display screens in order:
"Service"
"Calibrations"
"Timing Calibration Screen"
To calibrate the timing to the correct setting, select "Continue" on Cat ET. Wait until Cat ET indicates that the timing is "CALIBRATED".
Reduce the engine speed to low idle. Disconnect the 7X-1695 Cable from the timing calibration probe connector.
Exit the "Timing Calibration" screen on Cat ET.
Turn the keyswitch to the OFF position. Remove the 6V-2197 Transducer and remove the 7X-1171 Transducer Adapter from the timing calibration port. Reinstall the plug into the timing calibration port.Note: If Cat ET reads "Could Not Calibrate", the timing has not been set. Verify that the engine speed was stable during the testing ( 50 rpm). If the engine speed was unstable or the engine speed could not be controlled within 50 rpm because of mechanical factors or electrical factors, refer to the diagnostic procedure Troubleshooting, "Engine Misfires, Runs Rough or Is Unstable".
Recheck the tool installation and tool operation and try the calibration procedure again. If the crankshaft and camshaft gears have been reassembled incorrectly, the timing will not calibrate.
If all of the problems have been corrected but the timing can not be calibrated, check the cable of the 6V-2197 Transducer and check the transducer in order to verify that the transducer is not bent. If the 6V-2197 Transducer is