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on an as-is basis.
To retrieve DTCs
stored in the ECM memory:
*Switch on ignition to position II, do not
start the engine.
The DTCs are
displayed by brief operation (1 second) of the test button.
If the LED responds by displaying the
flashing code 1-1-1, no faults have been detected.
If a fault is present, the LED will display
the appropriate DTC as listed in the DTC tables. Note this is very slow.
Further DTCs can
be retrieved by repeating the above until the first DTC is displayed again.
Erasing DTCs
DTCs can be erased only when they have all been displayed and the first
DTC has been repeated at least once. The procedure is as follows:
*Switch on ignition to position II.
Note! DTCs must
be erased with the engine switched off, otherwise the
function cannot be guaranteed.
*Press test button and hold for more than
five seconds.
*Await LED response.
*Before the LED goes out, press the button
again and hold for more than five seconds.
*Switch ignition off and on.
*Start engine.
All DTCs will now
be erased and all adaptive values reset.
On ‘96/’97 850/900 cars with the 16 way
‘OBDII’ socket, some of the control modules use ‘flash’ codes,
THE USE OF THE FOLLOWING INFORMATION IS
ENTIRELY AT THE USERS RISK
To retrieve the flash codes the following
procedure can be adopted:
Connect an LED, with the correct polarity,
in series with a 1800 ohm resistor, between pin 16 (+)
and pin X, where X is the pin corresponding with the module to be read. Connect
a push to make switch between pin X and pins 4 or 5 (-).
The circuit can then be used in the same
way as the pre ’96 diagnostic sockets, situated in the engine compartment.
For
Motronic 4.3 or Fenix 5.2,X = 3.
850 ECC , X = 6,
Timer Type 4, X = 9.
Cruise Control, X = 13.
900 & S/V 90: ABS, X = 12, EZ116K, X =
1, LH 2.4, X = 3.
Fenix 5.2 DTC's(Pin 3)
1-1-1 Diagnostic system has not detected any faults
1-1-2 Control module fault
1-1-3 Short-term fuel trim, upper limit
1-1-5 Injector 1
1-2-1 Air pressure signal
1-2-2 Air temperature sensor signal
1-2-3 Engine Coolant Temperature signal
1-2-5 Injector 2
1-3-1 RPM sensor signal
1-3-2Battery voltage <8V or > 16V
1-3-5 Injector 3
1-4-3 Front knock sensor signal
1-4-4 Missing Load signal from Transmission ECU
1-4-5 Injector 4
1-5-2 Air pump valve
1-5-5 Injector 5
2-1-2 Heated O2 Sensor signal
2-2-1 Long-term fuel trim, part load, upper limit
2-2-2 System relay signal
2-2-3 Idle Air Control valve signal
2-2-5 A/C pressure sensor signal
2-3-1 Long-term fuel trim part load, lower limit
2-3-5 Exhaust Gas Recirculation converter
2-4-3 Throttle Position sensor signal
3-1-1 Vehicle Speed Sensor Signal
3-1-4 Camshaft Position sensor signal
3-2-3 Malfunction Indicator Lamp Circuit Faulty
3-4-2 A/C relay signal
3-4-3 Fuel Pump relay signal
4-3-2 Temperature warning >90°C
4-3-3 Knock Sensor signal rear
4-4-2 Air pump relay signal
5-1-2 Short-term fuel trim, lower limit
5-1-3 Temperature warning >95°C
5-1-4 Cooling Fan low speed signal
5-1-5 Cooling Fan high speed signal
5-2-1 Heated O2 Sensor heating fault
5-2-3 Control module box Cooling Fan
5-2-4 Ignition retard signal to TCM faulty
Motronic 4.3 DTC's(Pin 3)
1-1-1 No faults detected by OBD system
1-1-2 Fault in ECM
1-1-5 Injector 1
1-2-1 MAF sensor signal
1-2-3 Engine Coolant Temperature signal
1-2-5 Injector 2
1-3-1 RPM sensor signal, missing
1-3-2Battery voltage
1-3-5 Injector 3
1-4-3FrontKS, signal
1-4-5 Injector 4
1-5-3 Rear HO2S signal
1-5-4 EGR system, leakage
1-5-5 Injector 5
2-1-2 Front HO2S, signal
2-1-4 RPM sensor signal sporadic
2-2-3 Inlet Air Control valve opening signal
2-2-5 A/C pressure sensor, signal
2-3-1 Long Term Fuel Trim, part load
2-3-2 Long Term Fuel Trim, idling
2-3-3 Long term idle air trim
2-4-1 EGR system, flow malfunction
2-4-5 IAC valve closing signal
3-1-1 VSS signal
3-1-4 CMP sensor signal
3-1-5 EVAP system
3-2-5 Memory failure
3-3-5 Fault in lead between AW 50-42 and Motronic
4.3
4-1-1 TP sensor signal
4-1-3
EGR temp.sensor signal
4-1-4 Boost pressure regulation turbo only
4-1-6 Boost pressure reduction from TCM
4-2-5 Rear HO2S, regulating Only B5254S
4-3-2 Temperature warning ECU > 100°C
4-3-3RearKS, signal
4-3-5 Front HO2S slow response
4-3-6 Rear HO2S, compensation
4-4-3 TWC efficiency
4-4-4 Acceleration sensor, signal
4-5-1
Misfire cyl. 1
4-5-2
Misfire cyl. 2
4-5-3
Misfire cyl. 3
4-5-4
Misfire cyl. 4
4-5-5
Misfire cyl. 5
5-1-3 Temperature warning ECU > 110°C
5-1-4 Engine cooling fan, low-speed signal
5-2-1 Front HO2S, preheating
5-2-2 Rear HO2S, preheating
5-3-1 Power stage group A
5-3-2 Power stage group B
5-3-3 Power stage group C
5-3-4 Power stage group D
5-3-5 TC control valve, signal
5-4-1 EVAP-valve, signal
5-4-2 Misfire more than 1 cylinder
5-4-3 Misfire at least 1 cylinder
5-4-4 Misfire more than 1 cylinder
5-4-5 Misfire at least 1 cyl. TWC damage
5-5-1
Misfire cyl. 1. TWC damage
5-5-2
Misfire cyl. 2. TWC
damage
5-5-3
Misfire cyl. 3. TWC
damage
5-5-4
Misfire cyl. 4. TWC
damage
5-5-5
Misfire cyl. 5. TWC
damage
850 Electonic
Climate Control DTC's(Pin 6)
1-1-1 No fault found by diagnostic system
1-2-1Outside temperature sensor ground (GND)
short
1-2-2Outside temperature sensor open circuit or
shorted to 12 V
1-2-3Driver 's side passenger compartment
temperature sensor GND short
1-2-4 Driver's side passenger compartment temperature sensor open circuit
or shorted to 12V
1-2-5 Passenger side passenger compartment temperature sensor GND short
1-2-6 Passenger side passenger compartment, temperature sensor open
circuit or shorted to 12V
1-3-1 Duct temperature sensor left-hand GND short
1-3-2 Duct temperature sensor left-hand open circuit or shorted to 12 V
1-3-3 Duct temperature sensor right-hand GND short
1-3-4 Duct temperature sensor right-hand open circuit or shorted to 12 V
1-3-5 Engine temperature no frequency signal
1-4-1 Driver's side temperature switch giving faulty control signal
1-4-3 Passenger side temperature switch giving faulty control signal
1-4-5 Air distribution switch faulty control signal
1-5-1 Control signal from fan speed switch missing or too high
1-5-2 Control signal from fan speed signal GND short
2-1-1 Driver's side damper motor position sensor open circuit or shorted
to 12 V
2-1-2Driver 's side damper motor position
sensor GND short
2-2-1 Passenger side damper motor position sensor open circuit or shorted
to 12 V
2-2-2 Passenger side damper motor position sensor GND short
2-3-1 Ventilation damper motor position sensor open circuit or shorted to
12 V
2-3-2 Ventilation damper motor position sensor GND short
2-3-3 Floor-defrost damper motor position sensor open circuit or shorted
to 12 V
2-3-4 Floor-defrost damper motor position sensor GND short
2-3-5 Recirculation damper motor position sensor open circuit or shorted
to 12 V
2-3-6 Recirculation damper motor position sensor GND short
3 -1-1 Driver 's
side damper motor shorted to GND or 12 V
3-1-2 Passenger side damper motor shorted to GND or 12 V
3-1-3 Ventilation damper motor shorted to GND or 12 V
3-1-4 Floor/defrost damper motor shorted to GND or 12 V
3-1-5 Recirculation damper motor shorted to GND or 12 V
3-2-1Driver 's side damper motor active too
long
3-2-2 Passenger side damper motor active too long
3-2-3 Ventilation damper motor active too long
3-2-4 Floor/defrost damper motor active too long
3-2-5 Recirculation damper motor active too long
4-1-1 Passenger compartment fan overcurrent or
sticking
4-1-2Driver 's side passenger compartment
temperature sensor intake fan GND short
4-1-3Driver 's side passenger compartment
temperature sensor intake fan, no control voltage
4-1-4Driver 's side passenger compartment
temperature sensor intake fan sticking
4-1-5 Passenger side passenger compartment temperature sensor fan GND
short
4-1-6 Passenger side passenger compartment temperature sensor intake fan,
no control voltage
4-1-7 Passenger side passenger compartment temperature sensor intake fan
sticking
4-1-8 Power stage, no control signal
4-1-9 Power stage giving faulty diagnostic signal
4-2-0 Control unit fault in program memory
5-1-1 Self-adjustment damper motor limit positions not carried out
S/V 90 ABS DTC's(Pin 12)
1-1-1 No fault detected--
1-2-5 Faulty signal from at least one wheel sensor
1-3-5 Fault in control module
1-4-2 Brake light switch, open circuit
1-5-1 L/H front wheel sensor, open or short-circuit to supply
1-5-2 R/H front wheel sensor, open or short-circuit to supply
1-5-5 Rear axle sensor, open or short-circuit to supply
2-1-5 Valve relay, open-circuit or short-circuit
2-3-1 L/H front wheel sensor, signal absent
2-3-2 R/H front wheel sensor, signal absent
2-3-5 Rear axle sensor, signal absent
4-1-1 L/H front wheel valve, open or short-circuit.
4-1-3 R/H front wheel valve, open or short-circuit.
4-1-5 Rear valve open or short-circuit.
4-4-3 Pump motor/relay electrical or mechanical fault
EZ 116K DI ignition system DTC's(Pin 1)
1-1-1No faults
detected
1-4-2Fault in
control module
1-4-3Knock sensor
(KS) signal
1-4-4Faulty load
signal from fuel module.
1-5-4Exhaust Gas
Recirculation (EGR) unexpected flow
2-1-4Engine speed
(RPM) sensor
2-2-4Engine coolant
temperature (ECT) sensor
2-3-4Throttle
position (TP) switch signal
2-4-1EGR flow fault
4-1-3EGR
temperature sensor signal
DTC table LH 2.4 fuel injection system(Pin 3)
1-1-1No faults
detected
1-1-2Fault in
control module
1-1-3Short-term
fuel trim, Faulty control
1-2-1Mass air flow
(MAF) sensor signal, Faulty signal
1-2-3Engine coolant
temperature (ECT) sensor, Faulty signal
1-3-1Engine speed
signal from ignition system, Signal missing
1-3-2Battery voltage, Faulty
signal
1-3-3Throttle
position (TP) switch at engine idle, Faulty signal
2-1-2Heated oxygen
sensor (HO2S) signal, Faulty signal
2-1-3Throttle
position (TP) switch at full load, Faulty signal
2-2-1Long-term fuel
trim, part load, Lean part load
2-2-3Idle air
control (IAC) valve signal
2-3-1Long term fuel
trim, part load
2-3-2Long term fuel
trim, idle
3-1-1Vehicle speed
signal (VSS), Faulty signal
3-1-2Knock
enrichment signal from ignition system, Faulty signal
3-2-2Mass air flow
sensor (MAF)
3-4-4Exhaust gas
temperature sensor
Cruise Control Codes(Pin 13)
Note DTC's are
not saved once ignition is switched off
Diagnostic Trouble Codes (DTCs)
DTC Fault message
1-1-2 Illegal vehicle speed signal
1-2-2 Vehicle speed has not exceeded 35 km/h (22 mph) or no vehicle speed
signal
2-1-1Internal fault in control module
2-1-2 Fault in vacuum pump or regulator circuit
Confirmation of component activation (MODE
2)
1-1-3 Checking ON/OFF selector switch, brake and clutch valves
1-2-3 Checking RESUME switch
1-3-1 Checking SET+ switch
2-1-3 Checking SET- switch
1-3-2Checking the brake light switch
2-2-3 Checking Park/Neutral Position switch (PNP) (automatic
transmission)
