Check for fault codes stored on the computer !!
Service codes are retrieved from EEC-IV system through self-test connector. Various methods and test equipment may be used to access these codes:
Analog Volt-Ohmmeter (VOM)
In-Dash Malfunction Indicator Light (MIL) Or CHECK ENGINE Light
SELF-TEST CONNECTOR LOCATIONS
RangerRight front inner fender panel
KOEO & KOER SELF-TEST CODES
All service codes are 2- or 3-digit numbers. ECA outputs codes one digit at a time. These codes indicate current faults in system and should be serviced in order of appearance. Use SERVICE CODE REFERENCE CHARTS to find correct CIRCUIT TEST.
Codes are shown as voltage pulses. If using CHECK ENGINE light, service codes are displayed as light pulses. If using Volt-Ohmmeter (VOM), service codes are displayed as needle sweeps. See Fig. 1 .
Pay careful attention to length of pauses in order to read codes correctly. A 1/2-second pause occurs between number of sweeps in a digit and a 2-second pause occurs between digits in a code. A 4-second pause occurs between each code. KOEO codes are separated from Continuous Memory Codes by a 6-second delay, a single 1/2-second sweep (Separator) and another 6-second delay. Record codes in order received.
Scan tester, if used, will count pulses and display them as a digital code. STAR Series Tester will add a zero (0) to single-digit Separator Code (10) and Dynamic Response Code (10). Dynamic Response Code is displayed in KOER SELF-TEST. See Fig. 1 .
Monday, March 15th, 2010 AT 5:02 AM