Diagnostic Aids

A scan tester should indicate vehicle speed whenever vehicle is in motion. A faulty or misadjusted Park/Neutral switch can result in a false Code 24. Use scan tester to check for proper signal while vehicle is in Drive position. For intermittent inspection, see INTERMITTENTS in TESTS W/O CODES article.

Fig 1: Code 24 - Schematic

Courtesy of ISUZU MOTOR CO.

Fig 2: Code 24 - Diagnostic Flowchart

Courtesy of ISUZU MOTOR CO.