Diagnostic Aids

An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside insulation. Check for:

• Poor Connection Or Damaged Harness:  Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.

Fig 1: Code P1530 Schematic (3.8L) A/C Head Pressure Switch

Fig 2: Code P1530 Flow Chart (3.8L) A/C Head Pressure Switch