LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 1986 >> Riviera Base >> Repair and Diagnosis >> Engine Performance >> System >> BCM System, Part II >> Climate Control Diagnostic Charts >> Chart 3, Compressor Always Engaged (TORONADO)

Chart 3, Compressor Always Engaged (TORONADO)

Fig 1: Flowchart, Compressor Always Engaged (Toronado)
G5138
Fig 2: Compressor Always Engaged (Toronado)
GB0048404
Fig 3: Schematic, Compressor Always Engaged (Toronado)
G201322

Chart 3 is used whenever the A/C compressor remains engaged when the A/C mode is "OFF" on the ECC.

  1. This step checks to see if the fault is due to mechanical binding of the clutch and shorted control signal, or faulty signal to the power module.
  2. This step checks to see if the faulty signal to the power module is due to a fault in the power module or in the ECM and its control signal circuit.
  3. This step checks to see if the fault is due to mechanical binding of the clutch or a shorted control signal circuit, including the relay.