The Chevrolet HHR, a retro-styled compact car, relies on the OBD2 (On-Board Diagnostics II) system for diagnostics and emissions monitoring. Understanding the specific OBD2 protocol used in your HHR is crucial for effective troubleshooting and maintenance. This article delves into the Hhr Obd2 Protocol, pinouts, and compatibility information to help you navigate your vehicle’s diagnostic system.
Decoding the HHR OBD2 Protocol
The Chevrolet HHR, like most GM vehicles produced between 2003 and 2006, can utilize either the J1850-VPW or CAN (Controller Area Network) protocol. Pinout configurations may vary slightly depending on the specific model year and installed options. Most HHR models manufactured after 2006 predominantly use the CAN bus system. Consulting your vehicle’s owner’s manual for the exact protocol and connector pinout is always recommended.
OBD2 Connector Pinouts for GM Vehicles
Standard OBD2 Connector (Post-2000)
This table outlines the typical pinout for a standard OBD2 connector found in most GM vehicles, including later model HHRs:
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | Low Speed GMLAN Serial Data (Various Modules) | |
| 2 | J1708 | SAE J1708 Serial Data (Trucks only) |
| 3 | PTLAN (+) | High-Speed Hybrid GMLAN Serial Data (+) (Hybrid Vehicles) |
| 4 | GND | Chassis Ground |
| 5 | SGND | Signal Ground |
| 6 | HS-CAN (+) | High-Speed GMLAN Serial Data Bus + (Various Modules) |
| 7 | KW200 | Keyword 2000 Serial Data (Some Models) / J1708 Serial Data A (Trucks) |
| 8 | Central Control Module Diagnosis Enable (Some Holden Models) | |
| 11 | PTLAN (-) | High-Speed Hybrid GMLAN Serial Data (-) (Hybrid Vehicles) |
| 14 | HS-CAN(-) | High-Speed GMLAN Serial Data Bus – |
| 15 | J1708 B | SAE J1708 Serial Data B (Trucks only) |
| 16 | Battery+ | Battery Positive Voltage |
Pre-2000 OBD2 Connector
For pre-2000 GM vehicles, the OBD2 connector may have a different pinout configuration:
| Pin | Wire Color | Function |
|---|---|---|
| 2 | PPL | Serial Data Signal-Class B |
| 4 | BLK | Ground |
| 5 | BLK/WHT | VCM Ground |
| 8 | BLK/WHT | Keyless Entry Program Enable Signal |
| 9 | TAN | SIR Serial Data |
| 12 | TAN/WHT | Diagnostic Signal (ABS)/(15,000 GVW Only) |
| 13 | ORN | Diagnostic Signal-Transfer Case Control Module |
| 14 | GRN DK | Diagnostic Signal-Entertainment and Comfort |
| 16 | ORN | Battery |
Chevrolet OBD2 Compatibility
While not exhaustive, this table indicates the OBD2 protocols used in various Chevrolet models, including the HHR:
| Model | Engine | Year (starting from) | OBD-2 Protocol |
|---|---|---|---|
| Chevrolet HHR | Gasoline (168 HP) | 2008 | CAN (Likely) |
| … other Chevrolet Models … | … | … | … |
Importance of Knowing Your HHR’s OBD2 Protocol
Identifying the correct HHR OBD2 protocol is essential for using compatible diagnostic tools and retrieving accurate information. This knowledge allows for efficient troubleshooting, code reading, and sensor monitoring, empowering you to perform informed maintenance and repairs on your Chevrolet HHR. Always refer to official documentation for the most precise data.
