MODEL IDENTIFICATION
Vehicle model is identified by the fifth character of Vehicle Identification Number (VIN). VIN is stamped on metal pad on top of left end of instrument panel, near windshield. See MODEL IDENTIFICATION table.
| Series (1) | Model |
|---|---|
| "L" | AWD Astro & Safari |
| "M" | 2WD Astro & Safari |
| "S" | 2WD Blazer, Envoy, Jimmy, Sonoma & S10 Pickup |
| "T" | 4WD Blazer, Bravada, Envoy, Jimmy, Sonoma & S10 Pickup |
| (1) Vehicle series is fifth character of VIN. | |
| (1) | Vehicle series is fifth character of VIN. |
MODEL IDENTIFICATION
Description
Several states require that a vehicle pass On-Board Diagnostic (OBD) system tests and I/M emission inspection in order to renew license plates. This is accomplished by viewing the I/M System Status display on scan tool. Using a scan tool, the technician can observe the I/M System Status in order to verify that vehicle meets the criteria that complies with the local area requirements.
This procedure satisfies enable criteria necessary to execute all monitor diagnostics, and complete trips for those particular diagnostics. When all diagnostic tests have been completed, I/M System Status indicators are set to YES. Perform this test when more than one or all I/M System Status indicators are set to NO.
Ensure vehicle meets the following conditions before performing procedure
The following DTCs are required to set system status to YES
- P0133/P0153, P0140, P1133/P1153 and P1134/P1154 - Oxygen Sensor
- P0135, P0141 and P0155 - Oxygen Sensor Heater
- P0401, P0404, P0405 and P1404 - EGR
- P0420 or P0430 - Catalyst System
- P0440, P0442, P0446 and P1441 - EVAP System
Diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
The following DTCs are required to set system status to YES
- P0133/P0153, P0140, P1133/P1153 and P1134/P1154 - Oxygen Sensor
- P0135 - Oxygen Sensor Heater
- P0401, P0404, P0405 or P1404 - EGR
- P0410 and P1415/P1416 - Secondary AIR System
- P0420 or P0430 - Catalyst System
- P0440, P0442, P0446 and P1441 - EVAP System
Diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the Secondary Air Injection (AIR) system. The test may be used to set the I/M System Status to YES.
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the catalyst system. Test may be used to set the I/M System Status indicators to YES.
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the Exhaust Gas Recirculation (EGR) system. The test may be used to set the I/M System Status indicators to YES.
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the Evaporative Emission (EVAP) system. The test may be used to set the I/M System Status indicators to YES.
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the HO2S/O2S system. Test may be used to set the I/M System Status to YES. Ensure vehicle meets the requirements listed in conditions for running before performing this test.
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for Heated Oxygen Sensor (HO2S) system. The test may be used to set the I/M System Status to YES. Ensure vehicle meets the requirements listed in conditions for running DTC before performing this test.