Test KP - Octane Adjust
NOTE:
Enter this test when directed here by a driveability symptom. This test is intended to diagnose only the following systems or components:
- Harness circuits (VPWR, SIG RTN, OCT ADJ)
- Octane shorting bar connector
TEST PIN WIRE COLOR IDENTIFICATION
| Application (Test Pin No.) | Wire Color |
|---|---|
| Pin 46 | Black/White |
The purpose of the Octane Adjust Shorting Bar is to provide optimum spark advance for the fuel being used. If the vehicle engine detonates (spark knock), REMOVE the Octane Shorting Bar. This retards spark advance about 3 to 4 degrees. If the vehicle continues to detonate, use fuel with a higher octane rating.