GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The customer-snapshot feature lets the customer store the PCM data when a driveability problem occurs. The feature permits several snapshots during each ignition cycle. When the customer requests the snapshot, the PCM stores the data, and sets DTC P1624. The PCM also illuminates the MIL for a specific length of time to tell the customer that the data has been stored.

Conditions for Setting the DTC

The PCM receives a customer-snapshot request.

Action Taken When the DTC Sets

    • The PCM will illuminate the Malfunction Indicator Lamp (MIL) for 40 seconds.
    • The PCM will store the conditions which were present when the customer requested the snapshot as Fail Records data.

Diagnostic Aids

This DTC informs the technician that the customer has initiated the customer-snapshot function. The PCM will store up to 6 snapshots in the fail records before over-writing the first recorded snapshot. The customer-snapshot function may help to diagnose conditions which could not be duplicated during previous diagnosis.

If no other DTCs are set, the problem is most likely intermittent. Refer to Intermittent Conditions in Symptoms.

Step

Action

Values

Yes

No

1

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

--

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

2

Are any other DTCs set?

--

Go to the applicable DTCs. Go to Diagnostic Trouble Code (DTC) List/Type

Go to Diagnostic Aids