|
|
(P0173) FUEL SYSTEM 2/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED) When Monitored and Set Condition • When Monitored: With the engine running in closed loop mode, the ambient/battery temperature above -7°C • Set Condition: If the PCM multiplies short term compensation by long term adaptive and a certain percentage POSSIBLE CAUSES RESTRICTED FUEL SUPPLY LINE FUEL PUMP INLET STRAINER PLUGGED O2 SENSOR SIGNAL CIRCUIT O2 SENSOR GROUND CIRCUIT O2 SENSOR HEATER OPERATION MANIFOLD ABSOLUTE PRESSURE SENSOR OPERATION ENGINE COOLANT TEMPERATURE SENSOR OPERATION ENGINE MECHANICAL PROBLEM FUEL PUMP O2 SENSOR FUEL CONTAMINATION/EXHAUST LEAK For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA- Diagnostic Test 1. PRE-DIAGNOSTIC CHECK OUT Note: Always perform diagnostics with a fully charged battery. Note: Check connectors — Clean/repair as necessary. Poor pin to Note: Check for applicable TSBs related to the problem. With the DRB III T , read PCM DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and Perform this procedure prior to symptom diagnosis. Continue Go To 2 ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 253 |