Data Link References
WARNING: This page is about a different car, the 2021 Cadillac XT6. However, it is still accessible from the selected car via links, so may be relevant.
This table identifies which serial data link that a particular device uses for in-vehicle data transmission. Some devices may use more than one data link to communicate. Some devices may have multiple communication circuits passing through them without actively communicating on that data link. This table is used to assist in correcting a communication malfunction. Not all devices listed will be applicable to all vehicles. Refer to the schematics to determine which devices apply. For the description and operation of these serial data communication circuits, refer to Data Link Communications Description and Operation .
Reference Information
Schematic Reference: Data Communication Schematics
| Code | Device | Data Link Type | Diagnostic Procedure |
|---|---|---|---|
| A11 | Radio |
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| A26 | HVAC Controls |
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| A34 | HVAC Controls - Auxiliary | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| A97 | Transmission Range Selector Controls |
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| B75C | Multifunction Intake Air Sensor | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B110 | Battery Sensor Module | Local Interconnect Network (LIN) | DTC U01B0 |
| B165 | Content Theft Deterrent Sensor Module | Local Interconnect Network (LIN) | DTC U01B0 |
| B174W | Frontview Camera - Windshield |
|
|
| B200 | Rain Sensor Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| B218L | Side Object Sensor Module - Left | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B218R | Side Object Sensor Module - Right | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| B233B | Radar Sensor Module - Long Range | Object High Speed GMLAN | Scan Tool Does Not Communicate with Object High Speed GMLAN Device |
| B233LF | Radar Sensor Module - Short Range Left Front | Object High Speed GMLAN | Scan Tool Does Not Communicate with Object High Speed GMLAN Device |
| B233R | Radar Sensor Module - Short Range Rear | Object High Speed GMLAN | Scan Tool Does Not Communicate with Object High Speed GMLAN Device |
| B233RF | Radar Sensor Module - Short Range Right Front | Object High Speed GMLAN | Scan Tool Does Not Communicate with Object High Speed GMLAN Device |
| E13LA | Headlamp Assembly - Left | Headlamp Leveling High Speed GMLAN | DTC U172B or U172D |
| E13RA | Headlamp Assembly - Right | Headlamp Leveling High Speed GMLAN | DTC U172C or U172E |
| G10 | Cooling Fan Motor | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| G58 | Evaporative Emission Purge Pump | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| G59 | Engine Coolant Pump | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K9 | Body Control Module |
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| K19 | Suspension Control Module |
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| K20 | Engine Control Module |
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| K26 | Headlamp Control Module |
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| K29F | Seat Heating Control Module - Front | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K29R | Seat Heating Control Module - Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K32 | Steering Wheel Heating Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K33 | HVAC Control Module |
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| K36 | Inflatable Restraint Sensing and Diagnostic Module |
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| K39 | Liftgate Control Module |
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| K40 | Seat Memory Control Module |
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| K43 | Power Steering Control Module |
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| K47 | Rear Differential Clutch Control Module |
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| K56 | Serial Data Gateway Module |
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| K60 | Steering Column Lock Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K62 | Sunroof Sunshade Motor Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K71 / Q8 / T12 | Transmission Control Module / Control Solenoid Valve Assembly / Automatic Transmission Assembly |
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| K73 | Telematics Communication Interface Control Module |
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| K84 | Keyless Entry Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| K89 | Immobilizer Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K99 | Steering Column Position Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K111 | Fuel Pump Driver Control Module | Powertrain Sensor High Speed GMLAN | DTC U0076 |
| K124 | Active Safety Control Module |
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| K157 | Video Processing Control Module | Gateway Isolated Low Speed GMLAN | Scan Tool Does Not Communicate with Gateway Isolated Low Speed GMLAN Device |
| K160 / K17 | Brake System Control Module / Electronic Brake Control Module |
|
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| K171 | Hands-Free Liftgate Sensor Control Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| K172 | Night Vision Camera Control Module | Object High Speed GMLAN | Scan Tool Does Not Communicate with Object High Speed GMLAN Device |
| K182 | Parking Assist Control Module |
|
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| M35D | Window Motor Module - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M35P | Window Motor Module - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M96A | Active Grille Air Shutter 1 Actuator | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M96B | Active Grille Air Shutter 2 Actuator | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| M101L | Seat Belt Retractor Motor Module - Left | Chassis High Speed GMLAN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| M101R | Seat Belt Retractor Motor Module - Right | Chassis High Speed GMLAN | Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device |
| P16 | Instrument Cluster |
|
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| P17 | Info Display Module | Gateway Isolated Low Speed GMLAN | Scan Tool Does Not Communicate with Gateway Isolated Low Speed GMLAN Device |
| P25 | Power Sounder Content Theft Deterrent Alarm Module | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| P29 | Head-Up Display | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| Q97 | Engine Coolant Flow Control Valve | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S70R | Steering Wheel Controls Switch - Right | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79D | Window Switch - Driver | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79LR | Window Switch - Left Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79P | Window Switch - Passenger | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S79RR | Window Switch - Right Rear | Local Interconnect Network (LIN) | DTC U1500-U15FF |
| S165 | Infotainment Control Switch |
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| T3 | Audio Amplifier |
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| T19 | Power Supply Transformer | Powertrain High Speed GMLAN | DTC U0074 |
| V1 | Air Ionizer | Local Interconnect Network (LIN) | DTC U1500-U15FF |