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HOMESERVICE MANUALSCADILLAC1991SEVILLE STSREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - AUTOMATICTROUBLE SHOOTINGSERVICE MODE OPERATION & EXITING DIAGNOSTICSBCM SNAPSHOT TEST
1991 Cadillac Seville STS

BCM Snapshot Test

1991 Cadillac Seville STSSECTION BCM Snapshot Test
  1. Selecting the Snapshot test type while in BCM system level allows up to 3 snapshots, recorded at time of setting BCM trouble codes, to be recalled. A snapshot can also be recorded upon demand.
  2. Selecting snapshot (pushing HI button) while in BCM system, results in display of BXXX, where XXX is 3-digit trouble code. See Fig 1 . When selecting snapshot test type, there are 4 available options.
    • Pressing OFF button will stop the test type selection process and return the display to the next available system selection.
    • Pressing LO button allows scrolling through of BCM trouble codes list for snapshots stored in memory. After last BCM code (or third, if more than 3 codes are set), pressing LO button results in the display of TAKE BCM SNAPSHOT? message. Pressing LO button again will return to the first BXXX SNAPSHOT? display.
    • Pressing HI button displays either SNAP DATA? or BCM SNAP INPUTS? message, and selects the displayed test. The display is now controlled as it would be for non-snapshot data and inputs displays; however, all values and status information represents memorized vehicle conditions.
    • Pressing the HI button with SNAPSHOT displayed will again display the SNAPSHOT TAKEN message to indicate new information has been stored in memory.
Fig 1: Snapshot Test Type
G90C05452Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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