Circuit Tests: Notes
NOTE:
Geo uses two types of diagnostic connectors. Duty check Data Link Connector (duty check DLC) and OBD-II Data Link Connector (DLC). In this article, duty check DLC refers to 6-pin diagnostic connector. Connector is located next to left strut tower in engine compartment. DLC refers to 16-pin diagnostic connector located under instrument panel used for scan tool hook-up.
NOTE:
Ensure battery condition, cranking speed, and fuel quantity/quality are okay before performing circuit tests.
CIRCUIT TEST DIRECTORY
| Malfunction |
Circuit Test |
| No Malfunction Indicator Light (MIL) |
A1-1 |
| Malfunction Indicator Light (MIL) On Steady |
A1-2 |
| Engine Cranks But Will Not Run |
A1-3 |
| No Communication From Data Link Connector (DLC) |
A1-4 |
| Fuel Injector Circuit Check/Engine No-Start |
A1-5 |
| Fuel System Diagnosis/Fuel Pump Relay Check |
A1-7A |
| Fuel System Diagnosis/Fuel Pressure Check |
A1-7B |
CIRCUIT TEST DIRECTORY
| Malfunction |
Circuit Test |
| Engine Cranks But Will Not Run |
A1-3 |
| Fuel Injector Circuit Check/Engine No-Start |
A1-5 |
| Fuel System Diagnosis/Fuel Pump Relay Check |
A1-7A |
| Fuel System Diagnosis/Fuel Pressure Check |
A1-7B |