Idle Speed - Corrected JDS Adjustment Procedure
JDS-64Inconsistent Idle Speed Settings - Correction to JDS Idle Speed Adjustment Procedure
MODEL:
93 MY XJ6 and 4.0L XJS
DATE:
8/93
ISSUE:
Inconsistent results may occur when checking the idle speed on 1993 MY 4.0L engines when using JDS software issues 4060, 4065 and 4070. The problem is caused by incorrect positioning of the idle air valve.
ACTION:
The following change to the JDS instructions will give consistent idle speed settings:
Before the idle speed is displayed, the JDS operator message will read "Switch the ignition OFF, and then ON again".
The operator should switch the ignition OFF, wait 10 seconds and then switch the ignition ON.
This delay will allow consistent positioning of the idle air valve.