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Trouble Code Definition

325 SERIES & 525i (DME 3.1) FAULT CODE IDENTIFICATION

Fault Codes Affected Circuit Probable Cause
0 Undefined Defect (1) Undefined Defect Code Has Been Stored In Defect Code Memory
1 Fuel Pump Relay Shorted/Open Relay Or Circuit To DME Control Unit Pin No. 1
2 Idle Speed Actuator (Close) (2) Shorted/Open Actuator Or Circuit To DME Control Unit Pin No. 2
3 Fuel Injector (No. 1) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 3
4 Fuel Injector (No. 3) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 4
5 Fuel Injector (No. 2) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 5
6 Fuel Injectors (Output Signal) (4) Shorted/Open Injector Or Circuit To DME Control Unit
8 CHECK ENGINE Light Shorted/Open Indicator Light Or Its Circuit Wiring
12 Throttle Potentiometer (TPS) Shorted/Open Circuit In Sensor Or Its Circuit Wiring
16 Camshaft (Pulse) Sensor (5) Camshaft (Pulse) Sensor Signal Interrupted Or Faulty
18 Output Stage (Signal) (1) Shorted Circuit To Ground/Battery Voltage At DME Control Unit Pin No. 18
19 Output Stage (Signal) (1) Shorted Circuit To Ground/Battery Voltage At DME Control Unit Pin No. 19
23 Ignition Coil (Cylinder No. 2) (1) Open Circuit In Ignition Output Signal For Cylinder No. 2 (Pin No. 23)
24 Ignition Coil (Cylinder No. 3) (1) Open Circuit In Ignition Output Signal For Cylinder No. 3 (Pin No. 24)
25 Ignition Coil (Cylinder No. 1) (1) Open Circuit In Ignition Output Signal For Cylinder No. 1 (Pin No. 25)
26 DME Power Supply (B+) Voltage Input Less Than Battery Voltage (Engine Off)
29 Idle Speed Actuator (Open) (2) Shorted Actuator/Circuit To DME Control Unit Pin No. 29, Output Signal Faulty
31 Fuel Injector (No. 5) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 31
32 Fuel Injector (No. 6) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 32
33 Fuel Injector (No. 4) (3)(4) Shorted/Open Injector Or Circuit To DME Control Unit Pin No. 33
34 Output Stage (Signal) (6) Shorted/Open Component Or Circuit To DME Control Unit
36 Fuel Tank Vent (Evaporation) Control Shorted/Open Fuel Evaporation Control Valve Or Circuit To DME Control Unit
37 Oxygen Sensor Heater Shorted/Open Oxygen Sensor/Heating Element Circuit To DME Control Unit
41 Air Mass (Sensor) Meter Shorted/Open Air Mass Sensor Or Its Circuit Wiring
46 Output Stage (Signal) (1) Shorted Circuit To Ground/Battery Voltage At Dme Control Unit Pin No. 46
48 A/C Compressor Shutoff (1)(7) A/C Compressor Not Switched Off At Speed Less Than 5 MPH
50 Ignition Coil (Cylinder No. 4) (1) Open Circuit In Ignition Output Signal For Cylinder No. 4 (Pin No. 50)
51 Ignition Coil (Cylinder No. 6) (1) Open Circuit In Ignition Output Signal For Cylinder No. 6 (Pin No. 51)
52 Ignition Coil (Cylinder No. 5) (1) Open Circuit In Ignition Output Signal For Cylinder No. 5 (Pin No. 52)
54 DME Power Supply Voltage To DME Control Unit Drops Below 10 Volts Or Exceeds 14 Volts
55 Ignition Output Stage (Signal) (1) Open Circuit, Defect Could Not Be Assigned To Any Specific Cylinder
64 Ignition Timing Intervention (8) Short To Ground In Circuit To DME Control Unit Pin No. 64
67 Crankshaft (Speed/ Position) Sensor (1) No Sensor Signal, Ignition And Fuel Injection Are Turned Off
70 Oxygen Sensor Shorted/Open Circuit On Oxygen Sensor Or Its Circuit Wiring
73 Vehicle Speed Sensor (9) Faulty Vehicle Speed Sensor Signal
77 Intake Air Temp. Sensor Shorted/Open Circuit In Sensor Or Its Circuit Wiring
78 Engine (Coolant) Temp. Sensor Shorted/Open Circuit On Sensor Or Its Circuit Wiring
81 Anti-Theft (DWA) Signal Anti-Theft System Is Detected As Being On After Engine Has Started
85 A/C Compressor A/C Compressor Is Detected As Being On And A/C Switch Signal Is Not Received
100 Output Stage (Signal) (1) Shorted Circuit To Ground/Battery Voltage At DME Control Unit Pin No. 100
200 DME Control Unit Code Is Set When An Internal Defect Is Found In RAM Or ROM/EPROM
201 Defect (Fault) Code Memory Code Is Set If Illogical Data Are Stored In Defect Code Memory
202 Emission Control Emission Controls Out Of Range, No Air/Fuel Mixture Related Problem Is Detected
(1) Fault codes applicable to 325 models only.
(2) Fault Code 29 is also stored when connection to idle actuator or power supply is interrupted. Fault Codes 2 and 29 are also stored when engine operation is interrupted without ignition being switched off. Defect is then detected at an engine speed less than 600 RPM.
(3) Fault Code 6 may also be stored as pin No. 6 is connected to all injectors.
(4) Fault Code 6 can be ignored if a code for a specific injector is stored.
(5) Simultaneous activation of ALL ignition coils takes place when camshaft sensor signal is interrupted.
(6) Components/circuits affected are: idle speed actuator, oxygen sensor heater relay, fuel evaporation control, fuel pump relay, CHECK ENGINE light. Fault Code 34 can be ignored if a code for a specific injector is stored.
(7) Fault described occurs when circuit is shorted to ground. When circuit is shorted to battery voltage, A/C compressor never operates (engages).
(8) Fault code is set when wiring from control unit pin No. 64 to electronic transmission control (EGS) unit has a short to ground for at least 2.5 seconds. Ignition timing is adjusted in retard direction only once, after which this signal is ignored.
(9) Code is set when engine speed is greater than 4500 RPM at high loads for a minimum of 10 seconds.
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