Cruise Control Systems: Self-Diagnostics

1. Self-diagnostics should be performed when cruise control cancels without the driver using normal cancel modes. Diagnosis connector is located on right side of fuse box. Use analog voltmeter or Multi-Use Tester (MB991341) for code retrieval.
2. Use multi-use tester according to operating instructions provided with tester. Connect leads of analog voltmeter between cruise control terminal and ground terminal of self-diagnostic connector. SeeFig 1 . Read voltmeter needle sweeps to determine trouble code.
   NOTE: On 1991 models, codes No. 13, 14, 15, 16 and 17 will be displayed whether malfunction is present or not.
3. Once trouble codes have been displayed, see SELF-DIAGNOSTIC CODE CHART to determine the appropriate CIRCUIT TEST. SeeFig 2 or Fig 3 .
4. To clear trouble codes, either disconnect battery cable or turn ignition on. Turn main cruise control switch and set switch to ON position. Within one second turn resume switch to ON position.
5. Hold stoplight switch and cruise control switch in ON position for more than 5 seconds. Verify codes are cleared.

Fig 1: Identifying Self-Diagnostic Connector Terminals

Courtesy of MITSUBISHI MOTOR CO.

Fig 2: 1991 Self-Diagnostic Code Chart

Courtesy of MITSUBISHI MOTOR CO.

Fig 3: 1992 Self-Diagnostic Code Chart

Courtesy of MITSUBISHI MOTOR CO.