Diagnostic Aids

An open in circuits No. D2 or D7 will cause Code 23A to set. For intermittent inspection, see INTERMITTENTS in TESTS W/O CODES article in the ENGINE PERFORMANCE Section.

Fig 1: Code 23A Schematic - MAT Circuit (Low Temperature Indicated)

Courtesy of ISUZU MOTOR CO.

Fig 2: Code 23A Flow Chart - MAT Circuit (Low Temperature Indicated)

Courtesy of ISUZU MOTOR CO.