1993 850 GLT Fault Codes?

Discussion in 'Volvo 850' started by Happy Trails, Jul 4, 2008.

  1. Happy Trails

    Happy Trails Guest

    Is there any place online where I can get a step by step procedure to
    display these codes and interpret what they mean?

    I'm looking for something to tell if the crank position sensor and
    possibly fuel pump pressure are good.
     
    Happy Trails, Jul 4, 2008
    #1
  2. Happy Trails

    Mr. V Guest

    Mr. V, Jul 6, 2008
    #2
  3. Happy Trails

    david Guest


    Electronic Transmission (Socket A 1)
    ________________________________________
    111 No faults found
    112 Solenoid S1 short circuit to battery voltage
    113 Transmission control module (TCM) fault
    114 Program selector open circuit or short circuit to supply
    121 Solenoid S1 short circuit to ground or control module fault
    122 Solenoid S1 open circuit
    123 Solenoid STH short circuit to battery voltage
    124 Mode selector faulty or short circuit to ground
    131 Solenoid STH open/short circuit or control module fault
    132 Transmission control module(TCM) fault
    134 Faulty load signal from ignition control module
    141 Oil temperature sensor short circuit to ground
    142 Oil temperature sensor open circuit
    143 Kickdown switch faulty or short to ground
    211 Transmission control module (TCM) fault
    212 S2 solenoid short circuit to battery
    213 Throttle position (TPS) signal too high
    221 S2 solenoid short circuit to ground or control module fault
    222 S2 solenoid open circuit
    223 Throttle position (TPS) sensor signal too low
    231 Throttle position (TPS) sensor sporadic
    232 Speedometer signal missing
    233 Incorrect speedometer signal
    235 High Oil temperature
    245 Open or short in Torque limiting circuit
    311 RPM signal from transmission missing
    312 RPM signal from transmission faulty
    313 Faulty signal from gear position sensor (PNP)
    321 Shift time too long
    322 Incorrect gear ratio
    323 Lock up slips or is not engaged
    331 Short circuit to battery in SL circuit
    332 SL solenoid open or control module fault
    333 SL solenoid short or control module fault

    A2 DTC Codes

    DTC: ECT-123 Diagnostic Socket A2
    Engine Coolant Temperature Sensor Code
    The diagnostic trouble code EFI-123 is stored in the Engine
    Control Unit (ECU). The code, if set will be in diagnostic socket A2.
    A code will be set if the signal received at the ECU is below -44 C or
    above 148 C. When the engine is started a theoretical temperature is
    assumed and once that temperature reaches 75 C it is compared to the
    actual reading from the ECT. If the ECT temperature is lower than 58 C
    the code will be set. Should the code be set idle air trim adaptation
    is disabled, long-term fuel trim is disabled, leakage diagnostics is
    disabled and initial boost pressure is adopted. Replacement of the
    sensor can be done by following the instructions for replacing the
    thermostat. If you haven't replaced your thermostat in 60K or notice
    that it takes a while for the temp gauge to get to the 3:00 position,
    you might want to replace it while you are doing the ECT sensor.

    Oxygen Sensor Codes Diagnostic socket A2:
    EFI-153,212,425,435,436,521,533
    When any of the Oxygen Sensor codes are set, the most common
    repair is to replace the faulty sensor, however don't over look
    possible causes for the sensor to have failed such as: intake leak,
    exhaust leak, faulty spark plugs or wires, low compression on one or
    more cylinders, bad gas, or failed catalytic converter. Normally when
    an O2 sensor code has been set, fuel trim is inhibited and possible
    three-way catalytic converter (TWC) damage may occur. It is always a
    good idea to first read the codes and then see if they return prior to
    replacing any sensor, however if you have access to a scan tool, the
    tool can tell you how many times the code has been set, and if it's
    more than once or twice, you can be sure it is not a glitch in the
    system and a repair is in order. The oxygen sensor used in the Volvo
    FWD 850 is a 4-wire Bosch sensor, some owners have had success at
    replacing the sensor with an after market (Bosch) sensor. The sensor
    must be soldered into the existing wiring harness, if your not handy
    with a soldering iron then by the Volvo replacement. Instructions for
    replacing the sensors can be found in the repair section of this site
    at bay13.
    EFI-153; In order for the rear sensor to be able to monitor
    the three way catalytic converter and affect fuel trim, it must be at
    operating temperature and at the correct output voltage. Monitoring
    begins 3 minutes after start of the preheating. If the output voltage
    is different than the permitted values the code 153, Rear HO2 sensor
    signal missing or faulty is set.
    EFI-212; After 3 minutes of monitoring if the front sensor
    deviates from the permitted values, code 212, front HO2S signal
    missing or faulty is set.
    EFI-425; the rear sensor ensures the front is adjusting
    integrator values correctly, if all positive or negative, the rear
    sensor can be used to fine-tune the front sensors inputs. Tuning in
    only one direction by the rear sensor will set code 425, rear HO2
    sensor control faulty.
    EFI-435; the ECM clocks the time for the sensor to sweep from
    rich to lean and back to rich, excessive time will set code 435, HO2S
    front slow to respond.
    EFI-436; the ECM monitors the compensation being made by the
    rear sensor and sets this code when excessive compensation is being
    called for. Note: the front sensor can cause this code to be set in
    the rear.
    EFI-521 (front), EFI-522 (rear) is set if the ECM detects
    excessive or insufficient current in the heating circuits.

    ABS Socket (A3)
    ________________________________________
    111 No DTC set
    121 Left front wheel sensor, faulty signal <40 km/h
    122 Right front wheel sensor, faulty signal <40 km/h
    123 Left rear wheel sensor, faulty signal <40 km/h
    124 Right rear wheel sensor, faulty signal <40 km/h
    125 Signal faulty from at least one wheel sensor for a long period
    135 Control Module faulty
    141 Faulty pedal sensor, shorted to ground or supplly
    142 Faulty brake pedal switch, open or short
    143 Control module faulty
    144 Brake discs overheated
    151 Left front wheel sensor, open/short to battery
    152 Right front wheel sensor, open/short to battery
    155 Rear axle sensor open/short to battery
    211 Left front wheel sensor, not signal on moving off
    212 Right front wheel sensor, no signal on moving off
    213 Left rear wheel sensor, no signal on moving off
    214 Right rear wheel sensor, no signal on moving off
    215 Valve relay, open/short
    221 Left front wheel sensor, ABS operation signal missing
    222 Right front wheel sensor, ABS operation signal missing
    223 Left rear wheel sensor, ABS operation signal missing
    224 Right rear wheel sensor, ABS operation signal missing
    231 Left front wheel sensor, signal missing
    232 Right front wheel sensor, signal missing
    235 Rear axle sensor, signal missing
    311 Left front wheel sensor, open/short
    312 Right front wheel sensor. open/short
    313 Left rear wheel sensor, open/short
    314 Right rear wheel sensor, open/short
    321 Left front wheel sensor, irregular >40 km/h
    322 Right front wheel sensor, irregular >40 km/h
    323 Left rear wheel sensor, irregular >40 km/h
    324 Right rear wheel sensor, irregular >40 km/h
    411 Left front wheel inlet valve, open/short
    412 Left front wheel return valve, open/short
    413 Right front wheel inlet valve, open/short
    414 Right front wheel return valve, open/short
    415 Rear valve open/short
    421 Rear wheel inlet valve circuit, open/short
    422 Rear wheel return valve circuit, open/short
    423 Traction control system valve, open/short
    424 Pressure switch for TRACS, faulty or short circuit
    441 Control module faulty
    442 Pump pressure low
    443 Pump motor, electrical or mechanical fault
    444 No power supply to valves in hydraulic unit
    Ignition System (Socket A6)
    ________________________________________
    111 No DTC set
    112 Control Module fault
    123 Engine Coolant Temperature Sensor (ECT) from Control module
    missing or faulty
    131 Engine speed (RPM) sensor signal missing
    142 Control Module Fault
    143 Knock sensor (KS) missing or faulty
    144 Ignition control module load signal missing
    154 EGR system flow too high in system
    214 Engine speed (RPM) sensor signal missing sporadically
    224 Engine Coolant Temperature sensor (ECT) signal missing or faulty
    234 Throttle Position (TPS) signal missing at idle
    241 EGR system flow too low in system
    243 Throttle Position sensor (TPS) signal missing at idle
    311 Vehicle speed signal missing or faulty
    314 Camshaft Position sensor (CMP) signal missing or faulty
    324 Camshaft Position sensor (CMP) signal missing sporadically
    411 Throttle position sensor (TPS) signal from fuel injection system
    missing or faulty
    413 EGR temperature sensor signal faulty
    432 Control module box temperature too high level 1
    433 Knock sensor (KS) signal rar missing or faulty
    513 Control module box temperature too high, level 2
     
    david, Jul 7, 2008
    #3
  4. Happy Trails

    Happy Trails Guest

    .. . . copious information about what the codes mean.

    Now, is there any way, outside of buying or borrowing some apparently
    very expensive electronic diagnostic equipment, that I can display any
    codes this vehicle has?
     
    Happy Trails, Jul 7, 2008
    #4
  5. Happy Trails

    Jarkka Guest

    The 1993 850 has an on-board diagnostic unit that can be read without
    any tools.
    See http://volvospeed.com/Repair/a2.html
    More at
    http://www.volvoclub.org.uk/tech/service/850/TroubleshootingWithCodes-Turbo.pdf

    The sockets on the unit are
    A1 - Transmission
    A2 - Fuel injection
    A3 - ABS
    B1 - A/C
    B2 - Cruise control
    B5 - Airbags

    By the way, regarding your ignition problem, my two cents are on the
    camshaft or crankshaft sensor...
     
    Jarkka, Jul 7, 2008
    #5
  6. Happy Trails

    Happy Trails Guest

    Thanks a lot, Jarkka. I suspected this was possible with some of the
    Volvo models but for some reason could not google any info about it.

    Are these sensors easy to locate visually, and is it often a wiring
    problem rather than an actual sensor failure, as it is in my Jaguar?
     
    Happy Trails, Jul 8, 2008
    #6
  7. Happy Trails

    Jarkka Guest

    Are these sensors easy to locate visually, and is it often a wiring
    The camshaft sensor is located near (or actually within) the upper
    engine mount/torque bar. If it's the original, it looks like a small
    ice hockey puck (newer ones are shiny metal). I've heard of people
    discovering broken wiring, but if the sensor is the old type with a
    black plastic cover, I'd change it anyway. The replacement procedure
    is quite obvious.

    The crankshaft sensor is mounted on top of the bell housing - fairly
    easy to replace if you have a bit of dexterity (having small fingers
    help). I seem to remember that there's been interference problems when
    the wiring of the sensor has been tied to the HT ignition lead nearby,
    but I don't think this would result in stopping-and-going.

    You might find this doc useful:
    http://www.volvoclub.org.uk/tech/service/850/AutoTransDiagnosis.pdf
     
    Jarkka, Jul 9, 2008
    #7
  8. Happy Trails

    Happy Trails Guest

    Thanks again, Jarkka. I'll be back to the farm this weekend and have
    a look at all these things to see what's causing the failure to start.

    - Tom
    =========
     
    Happy Trails, Jul 9, 2008
    #8
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