Use the typical scan tool data values for comparison after you have completed the following steps:
| • | Performed the BCM diagnostic system check |
| • | Verified that the on-board diagnostics function correctly without displaying any DTCs |
The typical scan tool data values are an average of displayed values that are recorded from normally operating vehicles. The typical scan tool data values are intended to represent what a normally functioning system would display. The values that you receive may vary due to a low battery charge or other reasons. The values should be very close.
Use only the parameters that the tables list for diagnosis. If a scan tool reads another parameter, do not use the values in diagnosis. For more details on the scan tool typical data values and on the use of the scan tool for the diagnosis of BCM inputs, refer to the applicable diagnosis table. If all of the values are within the range that the table illustrates, refer to the following sections:
| • | Diagnostic Aids in the applicable diagnostic trouble code (DTC) table |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Ignition Switch in the RUN position /Vehicle in PARK /Headlamps in AUTO position | |||
Ambient Light | Data | LIGHT / DARK | LIGHT (When the BCM is in the LIGHT state and the DRLs are ON) DARK (auto headlamps will be ON) |
Ambient Light Sensor | Data | Volts | Maximum Light = 4.7 volts Dark to Light Transition Threshold - 2.2 volts Light to Dark Transition Threshold = 1.3 volts Maximum Dark = 0.2 volts |
Auto Headlamps Enabled | Input 2 | YES /NO | YES (When the BCM is requesting the auto headlamps ON) |
Auto Headlamps | Input 2 | ACTIVE /INACTIVE | ACTIVE (When the auto headlamps are ON) |
Battery Voltage | Data | Volts | 10.2-14.7 volts |
Battery Voltage | Security Data | Volts | 0.0-16.0 volts (Varies) |
Chime | Outputs | None /Headlamp /Turn Signal/ Key In Ignition /Device Control | NONE |
Content Theft Lamp | Security Data | ON /OFF /FLASHING | OFF |
Content Theft State | Security Data | OFF /IDLE /DISARMED /READY TO ARM /ARM INITIATED /ARM DELAY /ALARM /ARMED | IDLE |
Courtesy Lamp Relay | Input 2 | ON /OFF | OFF (Courtesy Lamps OFF) |
Courtesy Lamp Relay | Outputs | ON /OFF | OFF |
Courtesy Lamp Timer | Data | SECONDS | 0-40 seconds |
Daytime Running Lamps | Input 2 | ACTIVE /INACTIVE | ACTIVE in the LIGHT state (When the DRL is ON) |
Dimming | Outputs | ACTIVE /INACTIVE | INACTIVE (When the park lamps are OFF) |
Dimming Potentiometer | Data | Volts | 0.1-12.7 volts (Varies) |
Dim Pot Input | Input 2 | ACTIVE /INACTIVE | INACTIVE |
Dome Lamp Switch | Input 2 | ON /OFF | OFF |
Dome Override Switch | Input 2 | ON /OFF | OFF |
Door Handle Switch | Input 1 | ACTIVE /INACTIVE | INACTIVE |
Door Key Switch | Input 1 | ACTIVE /INACTIVE | INACTIVE |
Door Key Switch | Security Data | ACTIVE /INACTIVE | INACTIVE |
Door Lock Relay | Outputs | ON /OFF | OFF |
Door Lock Relay Feedback | Input 1 | ON /OFF | OFF |
Driver Door Jamb Switch | Input 1 | ACTIVE /INACTIVE | INACTIVE (door closed) ACTIVE (door open) |
Driver Door Unlock Relay | Outputs | ON /OFF | OFF |
DRL Relay | Outputs | ON /OFF | ON (DRL ON) |
Dusk | Data | YES / NO | YES (When in the DUSK state) |
Flash to Pass Switch (ENVOY ONLY) | Input 2 | ON /OFF | OFF |
Front Fog Lamp Relay | Outputs | ON /OFF | OFF |
Front Fog Lamp Switch | Input 2 | ON /OFF | OFF (ON when the button is pressed) |
Headlamp Power Relay (Except Envoy) | Outputs | ON /OFF | ON (When in the MANUAL headlamp position) OFF (When in the AUTO headlamp position and in the LIGHT State) |
Headlamp Relay Feedback | Input 2 | ON /OFF | OFF |
Headlamp Request Switch | Input 2 | ACTIVE /INACTIVE | ACTIVE (When in the MANUAL headlamp position) INACTIVE (When in the AUTO headlamp position) |
High Beam Input | Data | Volts | DRL Beams ON = 5.9-7.0 volts Low Beams ON = 11.5-14.0 volts High Beams ON = 1.2 volts (Varies with vehicle) |
High Beam Switch | Input 2 | ON /OFF | OFF |
Horn Relay | Outputs | ON /OFF | OFF |
Horn Relay Input | Input 1 | ACTIVE /INACTIVE | INACTIVE |
Ignition 1 | Input 1 | ACTIVE /INACTIVE | ACTIVE |
Ignition 1 | Security Data | ACTIVE /INACTIVE | ACTIVE (When Ignition Switch is in the RUN or CRANK position) |
Ignition 3 | Input 1 | ACTIVE /INACTIVE | ACTIVE |
Ignition 3 | Security Data | ACTIVE /INACTIVE | ACTIVE (When the ignition switch is in the RUN position) |
Ignition Power Mode | Input 1 | OFF /RUN /CRANK /UNKNOWN | RUN |
Inadvertent Power Relay | Outputs | ON /OFF | ON |
Inadvertent Power Timer | Data | SECONDS | 0-1216 seconds |
Interior Lamp Request | Input 2 | ACTIVE /INACTIVE | ACTIVE (When an interior lamp request is made and the inadvertent power relay is OFF) |
Interior Lighting Mode | Outputs | None /Interior /Illuminated Entry /Exit Lighting /Remote Illuminated | NONE |
Key In Ignition | Input 1 | YES /NO | YES |
Last RFA Since Wake-UP | Input 1 | NONE /Lock /Unlock /Rear /PANIC /Manual Resync /Fob Program /Diag Acknowledge /Diag Request | NONE |
Left Turn Signal | Input 2 | ON /OFF | OFF |
Lift Glass Relay | Outputs | ON /OFF | OFF |
Lift Glass Switch | Input 1 | ON /OFF | OFF |
Lighting Calibration Number | Module Information 2 | NUMERIC | 16XXXXXX (Varies with vehicle) |
Lighting Suffix | Module Information 2 | 2 Letters | AA-ZZ (Varies with vehicle) |
Low Beam Relay (Envoy Only) | Outputs | ON /OFF | ON (When in the MANUAL headlamp position) OFF (When in the AUTO headlamp position and in the LIGHT State) |
Module Part Number | Module Information 1 | NUMERIC | 16XXXXXX (Varies with vehicle) |
Manufactures Enable Counter | Module Information 1 | 0-255 | 0 |
Park Brake Switch | Input 1 | SET /RELEASED | RELEASED |
Park Lamp Relay | Outputs | ON /OFF | OFF |
Park Lamps | Input 2 | ON /OFF | OFF |
Pass Door Unlock Input | Input 1 | ACTIVE /INACTIVE | INACTIVE |
RAP Calibration Number | Module Information 2 | NUMERIC | 16XXXXXX (Varies with vehicle) |
RAP Relay | Input 1 | ON /OFF | ON |
RAP Relay | Outputs | ON /OFF | ON |
RAP Suffix | Module Information 2 | 2 Letters | AA-ZZ (Varies with vehicle) |
RAP Timer | Data | SECONDS | 0-1198 seconds |
Rear Fog Lamp Relay | Outputs | ON /OFF | OFF |
Rear Fog Lamp Switch | Input 2 | ON /OFF | OFF (ON when the button is pressed) |
Rear Gate /Door | Input 1 | OPEN /CLOSED | CLOSED |
Rear Pass Door /Lift Glass Jamb Switch | Input 1 | ACTIVE /INACTIVE | INACTIVE ACTIVE (door glass open) |
Reminder Calibration Number | Module Information 2 | NUMERIC | 16XXXXXX (Varies with vehicle) |
Reminder Suffix | Module Information 2 | 2 Letters | AA-ZZ (Varies with vehicle) |
RFA Message Since Wake-UP | Input 1 | NONE /PANIC /Actv Unlck Fob# Actv Lock /Prog Mode Cancel /Rear /Prog Mode Req /Transmitter Diag /Prog Successful /Prog Mode Ack /Manual Resync | NONE |
Right Turn Signal | Input 2 | ON /OFF | OFF |
Seat Belt Buckled | Input 1 | YES /NO | YES |
Security Calibration Number | Module Information 2 | NUMERIC | 16XXXXXX (Varies with vehicle) |
Security Suffix | Module Information 2 | 2 Letters | AA-ZZ (Varies with vehicle) |
Software Part Number | Module Information 1 | NUMERIC | 16XXXXXX (Varies with vehicle) |
Software Design Suffix | Module Information 1 | 2 Letters | AA-ZZ (Varies with vehicle) |
Vehicle Speed | Data | MPH and km/h | Varies with vehicle speed |
