LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mitsubishi >> 1994 >> Eclipse Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Tests W/Codes) >> Diagnostic Tests >> Code 31: Knock Sensor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code 31: Knock Sensor

WARNING: This page is about a different car, the 1994 Mitsubishi Diamante. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For component terminal identification, see TERMINAL IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
  1. Manufacturer does not provide component testing procedure using scan tester. Refer to manufacturer's operation manual for instructions in use of oscilloscope. Go to next step.
  2. Disconnect knock sensor connector and ECM connector. Ground ECM connector terminal No. 58. Using DVOM, check continuity between chassis ground and knock sensor connector terminal No. 1. If continuity does not exist, repair wiring harness as necessary. If continuity exists, go to next step.
  3. With knock sensor connector disconnected, check for continuity between chassis ground and knock sensor connector terminal No. 2. If continuity does not exist, repair wiring harness as necessary. If continuity exists, condition required to set code is not present at this time. Test is complete.
scientia non olet · About LEMON Manuals