1995 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE

Trouble Code Definition

NOTE: When DTC tests indicate to check a component, see indicated component I - SYSTEM/COMPONENT TESTS article. For Diagnostic Trouble Code (DTC) illustration symbol identification, see Figure . To identify ECM connector terminals, see WIRING DIAGRAMS  section.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION CHART

Code System Affected Probable Cause
11 (1) Camshaft/Crankshaft Position Sensor (2) No Crank Signal
12  Mass Airflow Sensor Circuit Open/Shorted Circuit
13  Engine Coolant Temperature Sensor Open/Shorted Circuit
14  Vehicle Speed Sensor (VSS) No VSS Signal
16 (1) Traction Control System (3) Open/Shorted Circuit
21 (1) Ignition Signal Circuit (2) Open/Shorted Circuit
31  ECM Signals Not Normal
32  EGR Function No EGR Operation
33  HO2S Sensor (Left) Open/Shorted Circuit/High HO2S Signal
34 (1) Knock Sensor Open/Shorted Circuit
35  EGR Temperature Sensor Open/Shorted Circuit
43  Throttle Position Sensor Open/Shorted Circuit
45  Injector Leak Leak At Injectors
46  (W/ TCS) (1) Second. Throttle Position Sensor Open/Shorted Circuit
51  Injector Circuit Injector Does Not Work
53  HO2S Sensor (Right) Open/Shorted Circuit/ High HO2S Signal
54 (1) A/T Signal Open Signal Transmission Control Unit
55 (1) No Malfunction Normal Condition
(1) Trouble code will not activate Malfunction Indicator Light (MIL).
(2) If Codes 11 and 21 are present at same time, check items causing a malfunction of camshaft/crankshaft position sensor circuit first.
(3) See appropriate ANTI-LOCK BRAKE SYSTEM article in BRAKES section.
Fig 1: Identifying DTC Illustration Symbols (Q45)
G90F18734Courtesy of NISSAN MOTOR CO., U.S.A.
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