PCM - Engine Detonation/Ping

99-021

June 7, 1999

1996-97 SLX - ALL

Engine Ping Below 3,000 RPM

SYMPTOM

The engine detonates (pings) when you accelerate lightly below 3,000 rpm.

PROBABLE CAUSE

The programmed ignition timing causes a non-damaging engine detonation to occur when the intake air temperature is above 140°F (60°C).

CORRECTIVE ACTION

Update the PCM software with the Smart Cable.

REQUIRED TOOLS AND EQUIPMENT

PGM Tester with SN902 or later software

For the other tools and equipment you'll need to update the PCM software, see Service Bulletin 99-019, Updating the SLX PCM, filed under Tools.





WARRANTY CLAIM INFORMATION

In warranty:
The normal warranty applies.

Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Technical Manager or your Zone Office. You must request consideration, and get a decision, before starting work.

REPAIR PROCEDURE

1. Retrieve the PCM broadcast code with the PCM Tester or the Smart Cable (see Service Bulletin 99-019).

2. Compare the code you retrieved with the codes in the list below.

^ If the code is in the list, go to step 3.

^ If the code is not in the list, the PCM software has already been updated. Use the '96-97 SLX Fuel and Emissions Manual to troubleshoot the cause of the engine ping.

PCM Broadcast Codes:

BNTZ
BTPS, BTXF, BTXW, BTYB, BTXZ
BUWR, BUWS
BXCS, BXTF, BXTH
BYKJ
BZLJ
CDMW, CDNA, CDNK
CFBB, CFBC, CFBH

3. Update the PCM software with the Smart Cable. For instructions, see Service Bulletin 99-019, Updating the SLX PCM, filed under Tools.





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