Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 550 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2006 Isuzu Ascender S, 5.3 M, 4WD
Diagnostic Code Index
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1000 | control Module Has Detected An Internal Malfunction |
| DTC B1004 | B1004: Keep Alive Memory (KAM) Reset |
| DTC B1007 | B1007: EEPROM Write Error |
| DTC B1009 | B1009: EEPROM Checksum Mismatch/Error |
| DTC U0001 | High Speed CAN Communication Bus |
| DTC U0073 | U0073: High Speed Communication Bus |
| DTC U0100-U0299 | A Control Module Is Not Communicating |
| DTC U1000 and U1255 | U1000: Class 2 Data Link U1255: Loss of Class 2 Communication |
| DTC U1001-U1254 | A Control Module Is Not Communicating |
| DTC U1300, U1301, or U1305 | U1300: Class 2 Data Link Low U1301: Class 2 Data Link High U1305: Class 2 Data Link High or Low |
| DTC U1500 | U1500: Graphical Interface Communication Malfunction |
| DTC U2100 | U2100: Controller Area Network (CAN) Bus Communication |
| DTC U2105-U2199 | U2105: Lost Communications With Engine Control System U2107: Lost Communications With Body Control System U2108: Lost Communications With ABS/TCS Control System |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.