Engine Controls - Tests W/codes: Diagnosis Mitsubishi Diamante I

SYSTEM DIAGNOSIS

System diagnosis can be accomplished using a voltmeter or appropriate scan tester. See RETRIEVING CODES . Engine Control Module (ECM) monitors several different engine control system circuits. If an abnormal input signal occurs, a fault code is stored in ECM memory and assigned a fault code number. Each circuit has its own fault number and message. A specific fault code indicates a particular system failure, but it does not indicate that cause of failure is necessarily within system.

A fault code does not condemn any specific component; it simply points out a probable malfunctioning area. If a fault code is set, ECM will turn on Malfunction Indicator Light (MIL). Fault codes can be confirmed by using a voltmeter. System malfunctions encountered are identified as either hard failures or intermittent failures as determined by ECM.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

Note. Codes listed in DIAGNOSTIC TROUBLE CODE INDEX table are not used on all vehicles.

Note. If MIL stays on, ECM may be faulty.

DIAGNOSTIC TROUBLE CODE INDEX

DIAGNOSTIC TESTS

Note. Perform all resistance and voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohms impedance, unless stated otherwise in test procedures.

Clear fault codes after each repair. See CLEARING CODES under SELF-DIAGNOSTIC SYSTEM. Recheck for codes to confirm repair. See RETRIEVING CODES under SELF-DIAGNOSTIC SYSTEM.