Test Step 4. Connect Cat ET

426

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 3. Start the Engine and

D. Ensure that all of the connections are made

Allow the Coolant to Reach Operating

correctly.

Temperature

Results:

A. Start the engine and run at low idle until the

OK Proceed to Test Step 5.

engine has warmed up enough to exit Cold

Mode operation. The Cat ET status screen will

Test Step 5. Calibrate the Speed/Timing

display "COLD MODE" in the upper corner

Sensor

when Cold Mode operation exists. The engine

will adjust idle rpm from Cold Mode idle to the

A. To calibrate the timing to the correct setting,

programmed Low Idle rpm when Cold Mode

select "space" on Cat ET. Wait until Cat ET

operation is complete.

indicates that the timing is "CALIBRATED".

B. Check for active diagnostic codes. Use the

Note: If the Cat ET display reads "CALIBRATION

procedures in this manual to troubleshoot and

UNSUCCESSFUL", the electronic injection timing

repair any active diagnostic codes before

has not been set. Recheck the tool installation and

attempting a calibration check. The engine must

tool operation and try again to calibrate electronic

not have any diagnostic fault conditions that are

injection timing. If the crankshaft and camshaft

present during the timing calibration except the

gears have been reassembled incorrectly, the

following condition:

engine will not calibrate.

22-13 Check Timing Sensor Calibration (42)

If the timing calibration has been successfully

completed, do not exit the timing calibration

C. After the engine has warmed up, set the engine

screen on Cat ET until you have disconnected

speed to 1100 rpm by using the cruise control

the 7X-1695 Cable for the 6V-2197 Magnetic

switches or by using the accelerator pedal.

Transducer from the P400 Speed/Timing

Calibration Connector.

Note: The engine rpm must be steady within the

1000 to 1200 rpm range in order to perform a timing

Expected Result:

calibration.

The timing calibration procedure was completed

Results:

successfully.

OK Proceed to Test Step 4.

Results:

Test Step 4. Connect Cat ET

OK The timing calibration procedure was

completed successfully. Proceed to Test Step 6.

A. Connect Cat ET to the cab data link connector.

Not OK

B. After the engine has exited Cold Mode operation,

access the "Timing Calibration Screen" on Cat

Repair: Perform the following procedure:

ET. Access the following display screens in order:

1. Verify that the engine rpm was stable during

"Service"

the testing ( 50 rpm). If the engine rpm

was unstable or the engine rpm could not

"Calibrations"

be controlled within 50 rpm because of

mechanical factors or electrical factors, refer

"Timing Calibration"

to Troubleshooting, "Engine Misfires, Runs

Rough or Is Unstable".

Note: To perform a timing calibration, the engine rpm

must remain as steady as possible at approximately

2. If all of the problems have been corrected but

1100 rpm. This can be performed by using the idle

the timing can not be calibrated, check the

engine governor or a steady foot on the accelerator

cable of the 6V-2197 Magnetic Transducer

pedal. Any changes to engine rpm that are more

and check the 6V-2197 Magnetic Transducer

than 100 rpm will slow down the procedure. These

in order to verify that the Magnetic Transducer

changes will also reduce the accuracy of the

is not bent. If the 6V-2197 Magnetic

procedure.

Transducer is not bent, restart this procedure.

C. Connect the 7X-1695 Cable for the 6V-2197

STOP.

Magnetic Transducer to the J400 Speed/Timing

Calibration Connector.