DTC P0171 FUEL INJECTION SYSTEM FUNCTION (LEAN SIDE) - Wiring Diagram / Diagnostic Procedure
EF & EC-7156wiring diagramWiring Diagram
DTC P0171 Fuel Injection System Function (Lean Side) Wiring Diagram
Components (11)
ECMHeated oxygen sensor 1 (front)Injector No.1Injector No.2Injector No.3Injector No.4Ignition switchECM relayFusible link and fuse boxFuse block (Refer to POWER SUPPLY ROUTING in EL section)Battery
Connections (9)
Battery
Battery:+Fusible link and fuse box??
Fusible link and fuse box
Fusible link and fuse boxECM relay??
ECM relay
ECM relayECM??
Ignition switch
Ignition switchECM??
ECM
ECMHeated oxygen sensor 1 (front)??
ECMInjector No.1??
ECMInjector No.2??
ECMInjector No.3??
ECMInjector No.4??
NOTE
L = LHD models, R = RHD models. Engine control harness, Main harness, Engine room harness (LH). Wire colors not legible at scan resolution.
Diagnostic Procedure
DTC P0171 Diagnostic Procedure
1
1. CHECK EXHAUST AIR LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst.
NG
Repair or replace.
OK
2
GO TO 2.