Code 25, 53 - Fuel Pressure Regulator VSV

NOTE: See appropriate wiring diagram in WIRING DIAGRAMS article for terminal and connector identification.

NOTE: Test numbers refer to numbers on diagnostic chart.

1. Test resistance between Light Green/Black wire and Light Green/Yellow wire at VSV connector.

Fig 1: Code 25, 53 - Diagnostic Flowchart (1 Of 2) Courtesy Isuzu Motor Co

Fig 2: Code 25, 53 - Diagnostic Flowchart (2 Of 2) Courtesy Isuzu Motor Co