Engine Controls - Spark Knock/Ping On Acceleration
04-050October 11, 2011
Applies To:
2003-04 Accord V6 With A/T - ALL
Engine Spark Knock on Acceleration
(Supersedes 04-050, dated July 23, 2011, to revise the information marked by the black bars and asterisks)
SYMPTOM
The engine has a spark knock (ping) during acceleration.
PROBABLE CAUSE
The programmed ignition timing is too advanced during specific engine operating conditions.
CORRECTIVE ACTION
Update the PCM.
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Failed Part: P/N 37820-RCA-A73
Defect Code: 07201
Symptom Code: 09117
Skill Level: Repair Technician
REPAIR PROCEDURE
1. Verify that the MIL is not on.
2. Make sure you have the latest iN CD (August '04 or later) loaded into your dealership's master server. If not, load the software using the instructions that come with the CD.
3. Update the PCM software using the Honda Interface Module (HIM); refer to S/B 01-023, Using the Honda Interface Module to Update Control Units/Modules.
NOTE:
If the PCM already has the correct software update, refer to the appropriate service manual for troubleshooting.
4. Do the idle learn procedure:
^ Make sure all electrical items (A/C, audio, rear window defogger, lights, etc.) are off.
^ Connect the HDS to the 16P data link connector. Follow the prompts, and do the ECM/PCM Reset and Crank Pattern Clear procedures.
^ Turn the ignition switch to ON (II) for 30 seconds.
^ Start the engine, and let it warm up to its normal operating temperature (cooling fans cycle twice).
^ Let the engine idle (throttle fully closed and all electrical items off) for 10 minutes.
5. Do the low-rpm CKP pattern learn procedure:
^ Test-drive the vehicle on a level road: With the A/T in 2nd gear, decelerate (with the throttle fully closed) from an engine speed of 2,500 rpm down to 1,000 rpm.
^ Stop the vehicle, and shift into Park. Set the parking brake. Do not turn off the ignition switch.
6. Using the HDS, check the status of PULSER F/B LEARN:
^ On the HDS Selection Menu, select PGM-FI.
^ On the Mode Menu, select Data List.
^ Check the value of PULSER F/B LEARN.
^ If the value is Completed, go to step 7.
^ If the value is Not Completed, make sure the engine is at normal operating temperature [the ECT SENSOR (1) value is 176 or higher], and repeat step 5.
7. Do the high-rpm CKP pattern learn procedure:
NOTE:
The low-rpm CKP pattern learn procedure must be completed before you do the high-rpm CKP pattern learn procedure.
^ Test-drive the vehicle on a level road: With the "A" in 1st gear, decelerate (with the throttle fully closed) from an engine speed of 5,000 rpm down to 3,000 rpm.
^ Stop the vehicle, and shift into Park. Set the parking brake. Do not turn off the ignition switch.
8. Using the HDS, check the status of PULSER F/B LEARN (HIGH RPM):
^ On the HDS Selection Menu, select PGM-FI.
^ On the Mode Menu, select Data List.
^ Check the value of PULSER F/B LEARN (HIGH RPM).
^ If the value is Completed, you are finished. Disconnect the HDS.
^ If the value is Not Completed, make sure the engine is at normal operating temperature [the ECT SENSOR (1) value is 176 or higher], and repeat step 7.
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