Section 15 (Computer/Integrating Systems)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic Wiring Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Notes
- Diagnostic Starting Point - Computer/Integrating Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B1000: Electronic Control Unit (ECU) Performance
- DTC B1004: Keep Alive Memory (KAM) Reset
- DTC B1007: EEPROM Write Error
- DTC B1009: EEPROM Checksum Mismatch
- DTC B1397: Device Voltage Reference Output Circuit Low
- DTC B1440: Power Mode Master Input Circuits Mismatch
- DTC B1477: Retained Accessory Power Circuit Low
- DTC U0100 - U0299: Lost Communication With Transmission Control Module (TCM)
- DTC U1000:
- DTC U1001-U1254:
- DTC U1300, U1301, or U1305: Class 2 Data Link Low, Class 2 Data Link High, Class 2 Data Link Low or High (5.3L)
- DTC U1300, U1301, or U1305: Class 2 Data Link Low, Class 2 Data Link High, Class 2 Data Link Low or High (4.2L)
- DTC U2100: High Speed CAN Communication Bus
- DTC U2105-U2199: Lost Communication With Engine Control Module (ECM)
- Symptoms - Computer/Integrating Systems
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device (4.2L w/o Immobilizer)
- Scan Tool Does Not Communicate with Class 2 Device (4.2L w/Immobilizer)
- Scan Tool Does Not Communicate with Class 2 Device (5.3L)
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Power Mode Mismatch
- Retained Accessory Power (RAP) On After Timeout (Except XUV)
- Retained Accessory Power (RAP) On After Timeout (XUV)
- Retained Accessory Power (RAP) Inoperative (Except XUV)
- Retained Accessory Power (RAP) Inoperative (XUV)
- Control Module References
- Data Link References
- Repair Instructions
- Description and Operation