Retrieving Codes
- Turn ignition switch to OFF position. Using an analog voltmeter, connect voltmeter positive lead to self-diagnostic check connector terminal No. 5 (cruise control) and negative lead to terminal No. 12 (ground). See Fig 1
. Self-diagnostic check connector is located next to junction block, above left kick panel.
Courtesy of CHRYSLER MOTORS.
- Ensure all accessories are off. Turn ignition switch to ON position and Electronic Cruise Control Unit (ECU) codes will begin to display. If 2 or more systems are non-functional, they are indicated by order of increasing code number.
- Indication is made by 12-volt pulses of voltmeter pointer. A constant repetition of 12-volt pulses indicates system is normal. If system is abnormal, voltmeter will pulse between zero and 12 volts. Signals will appear on voltmeter as long and short 12-volt pulses. Long pulses represent tens; short pulses represent ones.
- Check voltmeter reading against self-diagnostic display patterns and perform indicated test. See Figure
. If any codes are displayed, circuit malfunction may be present. Cruise control system is normal if codes can be reset.