Feilkodeavlesning LH2.4

[Joakim-G_R]

Fant ikke dette når jeg søkte her. Om det finnes er det jo bare å gi meg smekk og slette tråden.

Sakser inn fra en annen side




The OBD system:

OBD stands for "On Board Diagnostics".

Many of the LH2.4 cars have a test-socket from which you can read the fault-codes of the ECU, EZK and TCU. The later model cars (1995-1998 940) has a serial interface instead of a test socket in which the VST-tool or an OBDII reader is supposed to plug in to read the fault-codes.

The LH2.4 ECU costantly monitors the following things:

-The control module's own, internal functions.
-Heated oxygen sensor (HO2S) and fuel trim.
-Engine coolant temperature sensor.
-Mass air flow (MAF) sensor.
-Battery voltage.
-Throttle position switch (TP switch).
-Engine speed (RPM) signal from the engine control module (ECM).
-Speedometer signal.
-Knock enrichment signal from the ignition system (does not apply to B 230 F, B 204 FT/GT).
-The idle air control (IAC) valve.

A fault in any of these functions is presented as a diagnostic trouble code (DTC) in diagnostic test mode (DTM) 1.

The EZK116 constantly monitors the following things:

-The control module's own, internal functions.
-Knock sensor (KS) signal.
-Fuel system load signal.
-Timing pick-up signal.
-Temperature sensor signal.
-Signal from the EGR converter.
-Signal from the EGR temperature sensor.

A fault in any of these functions is presented as a diagnostic trouble code (DTC) in test function 1.

All the diagnostic trouble codes (DTCs) are reversible. This means that if a signal has resulted in a diagnostic trouble code (DTC) being stored and it is OK next time the ignition is turned on, the control module will use the programmed correct value instead of remaining in “limp-home” mode. But the diagnostic trouble code (DTC) remains stored in the memory.

Diagnostic Test Mode 1: Fault Code Retrieval.

* Place the cable into socket 2 (LH2.4 fuel injection test) or 6 (EZK116 ignition test).
* Turn the ignition ON to KPII without starting the engine.
* Select Mode 1 by pressing the button once and holding for more than 1 second but less than 3 seconds.
* The LED lamp will flash in successive series of three digits followed by a three-second pause. If there are no fault codes stored, it will flash 1-1-1 indicating the fuel injection system is operating correctly.
* Count the successive flashes and record the fault code.
* Press the button again.
* Record the fault code. If it is the same as the previous one, then no additional codes are stored. Repeat until all the codes stored are retrieved (maximum of three). If the car is from California you can read up to 17 fault-codes at the same time.
* Refer to the tables below for the interpretation of fault codes from the LH2.4 Fuel injection System and EZK 116 Ignition System.
* Move the cable into socket 6 (for ignition codes from EZK116) or socket 2 (for fuel injection codes from LH2.4) and repeat the above.

Erasing Fault Codes.

After you have retrieved all the Fault Codes in the steps above, you should erase the system memory.

* Repeat the steps above and read the fault codes again.
* Press and hold the button for more than five seconds, then release it.
* When the LED lights, press the button again for more than five seconds and release. If the LED goes off, then the memory is cleared.
* To test that memory is cleared, press the button again for >1 second and <3>1 and <3>1 and <3>1 and <3>1 and <3 seconds before pressing again).
* The diagnostic unit then tests the EGR system controller which you can hear or feel.
* Exit by switching off the ignition.

LH2.4 Fuel Injection Fault Codes (DTC):

Socket position 2.

(The * means that the CEL is lit)

1-1-1 No faults detected.
1-1-2 Fault in control module.
1-1-3* Short-term fuel trim. Faulty control. Fuel trim (lambda control) too lean or rich.
1-2-1* Mass air flow (MAF) sensor signal. Faulty signal to/from Air Mass Meter.
1-2-3* Engine coolant temperature (ECT) sensor. Signal missing to/from coolant temp. sensor.
1-3-1 Engine speed signal from ignition system. Signal missing.
1-3-2 Battery voltage. Battery voltage too low/high.
1-3-3 Throttle position (TP) switch at engine idle. Throttle switch idle setting faulty or grounding fault.
2-1-2* Heated oxygen sensor (HO2S) signal. Faulty or missing signal.
2-1-3 Throttle position (TP) switch at full load. Faulty or missing signal.
2-2-1* Long-term fuel trim, part load. Lean part load.
2-2-3 Idle air control (IAC) valve signal. Faulty or missing signal.
2-3-1* Fuel trim (lambda control) too lean or too rich at part load.
2-3-2* Fuel trim (lambda control) too lean or too rich at idle.
3-1-1 Vehicle speed signal (VSS). Faulty or missing signal. (Also signal from speedometer).
3-1-2 Knock enrichment signal from ignition system. Faulty signal.
3-2-2 Mass air flow sensor (MAF). Air Mass Meter wire burn-off signal absent or faulty.
3-4-4 Exhaust gas temperature sensor. Faulty.

EZK 116 Ignition Fault Codes (DTC):

Socket position 6.

(The * means that the CEL is lit)

1-1-1 No faults detected.
1-4-2* Fault in control module.
1-4-3* Knock sensor (KS) signal. Faulty or missing signal.
1-4-4* Load signal. Faulty or missing signal.
1-5-4* EGR. EGR system flow too high.
2-1-4 Engine speed (RPM) sensor. Intermittently absent.
2-2-4 Engine coolant temperature (ECT) sensor. Faulty or missing signal.
2-3-4 Throttle position (TP) switch signal. Faulty or missing signal.
2-4-1* EGR (NTC). EGR system flow too low.
2-4-1* EGR (PTC). EGR system flow too low.
4-1-3* EGR temperature sensor signal (NTC). Faulty or missing signal.
4-1-3* EGR temperature sensor signal (PTC). Faulty or missing signal.

Special Fault Codes (DTC):

ABS Fault Codes (DTC):

Socket position 3.

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–circ. to supply
1–5–2 R/H front wheel sensor, open or short–circ. to supply
1–5–5 Rear axle sensor, open or short–circ. 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–circ.
4–1–3 R/H front wheel valve, open or short–circ.
4–1–5 Rear valve open or short–circ.
4–4–3 Pump motor/relay electrical or mechanical fault

TCU Fault Codes (DTC):

Socket position 5.

2-4-2 Turbo control valve. Open-circuit or shorted.
3-1-2 Knocking information. Signal faulty.
3-4-2 A/C blocking relay. Signal faulty.
4-2-1 Pressure sensor. Faulty boost pressure.
4-2-2 Exhaust gas temperature controller. Signal faulty.
4-2-3 Throttle position sensor. Signal faulty.
4-2-4 Load signal. Signal faulty.
4-3-1 Temperature sensor. Signal missing.

[ChrML]

Når vi først har en tråd for feilkodeavlesing og sletting:


Airbag 940 1993+ (feilkodeavlesing og sletting av feilkoder):

SRS Onboard Diagnostic Codes: 1993+ Cars. Later 940 and 960 cars have an onboard diagnostic system for the Supplemental Restraint System that both monitors the system and stores any fault codes for later diagnosis. Faults can occur in components such as airbags, seat belt tensioners, and the sensor unit or in their associated wiring circuits. A fault is indicated by the SRS lamp in the instrument panel, which remains "on" until the fault has been remedied and the OBD system cleared.

To read faults, refer to the OBD diagnostic output boxes on the front of the driver's side strut tower. You will find two, labelled "A" and "B". Box "A" has the probe, the test button, and the LED readout.

Remove the selector lead from the side of "A" and insert it into terminal 5 of output box "B".
Turn the ignition "on" to key position II.
Wait about ten seconds.Press the button on box "A". Keep it pressed for about 1 second.
Read off the LED flashes. Codes have three digits: A-B-C. If code 1-1-1 is read, there are no stored fault codes. If a code other than 1-1-1 is obtained, write it down and press the button again to see if there are more. When the first code recurs, all codes have been read. If you can't obtain any flashing light, see No Codes.
[Jay Simkin] Always read the codes three times before resetting them. Often they will not reset after just one, or even two readings.


Fault Codes
1-1-1 OK: No faults detected in the OBD system
1-1-2 Internal fault in the sensor unit
1-2-7 SRS lamp, short circuit or break in circuit
2-1-1 Steering wheel module, short circuit in wiring
2-1-2 Steering wheel module, break in wiring
2-1-3 Steering wheel module, short circuit to ground
2-1-4 Steering wheel module, short circuit to +12V
2-2-1 Passenger module, short circuit in wiring
2-2-2 Passenger module, break in wiring
2-2-3 Passenger module, short circuit to ground
2-2-4 Passenger module, short circuit to +12V
2-3-1 Seat belt tensioner left, short circuit in wiring
2-3-2 Seat belt tensioner left, break in wiring
2-3-3 Seat belt tensioner left, short circuit to ground
2-3-4 Seat belt tensioner left, short circuit to +12V
2-4-1 Seat belt tensioner right, short circuit in wiring
2-4-2 Seat belt tensioner right, break in wiring
2-4-3 Seat belt tensioner right, short circuit to ground
2-4-4 Seat belt tensioner right, short circuit to +12V
No code SRS lamp in the instrument cluster does not light
No code Fault in diagnostic output


To clear fault codes other than 1-1-2 (indicating a crash sensor fault, which must not be cleared but rather returned to the dealer):

Remember to read the codes three times before clearing.
Remove the selector lead from the side of "A" and insert it into terminal 5 of output box "B".
Turn the ignition "on" to key position II.
Press the button on box "A". Keep it pressed for at least 5 seconds.
Release the button. The LED lights.
Press the button again when the LED lights and keep it pressed for at least 5 seconds.
The codes are now cleared.
To check whether codes are cleared, repeat procedure A above. If codes remain, then the fault persists and must be repaired.

[Jay Simkin] If you still have SRS trouble codes, try this as a last resort. Disconnect the negative battery terminal clamp. Let the car sit for 1/2 hour. Reconnect the negative terminal clamp and drive the car. Do this three times. If the SRS light re-sets, fine. If not, it is time to replace the SRS sensor and the power module.



Cruisecontrol på nyere LH 2.4 biler (feilkodeavlesing):


Cruise Control Onboard Diagnostic Codes.

[Editor] Later LH2.4 cars employing two diagnostic modules can directly read cruise control codes. Plug the module pigtail from the "A" unit (this unit has the pigtail connector, the test button, and the LED readout lamp) into position two on the "B" unit. The cruise control system for earlier LH2.4 cars without a "B" unit can be connected to the OBD system to read diagnostic codes. To do this, run a wire from the extra pigtail on the cruise control unit connector at the left side under the driver's kick panel to the OBD diagnostic connector in the engine compartment (the pigtail you plug into the various holes.) The system must be tested with the ignition "On" and after roadtesting above 35 km/h (22mph) since the unit does not store codes, only reports them, and erases all codes when the ignition is turned off. The following is a brief excerpt from the OEM manual.

There are two diagnostic modes:

Mode 1: Self Diagnosis
Ignition "On" after roadtest, diagnostic wire connected. Press diagnostic button once for one second. Read the code.(If nothing flashes, see No Code.)Check for another code by pressing again for one second. Repeat until the first code is returned. This test returns various error codes from the road test.

1-1-1 No faults detected; speed has exceeded minimum 35 km/h needed for test

No fault

1-1-2 Abnormal speed signal
Possible static in speed signal to control

1-2-2 No speed signal, or has not exceeded minimum 35 km/h
Voltage feed (12V between terminals 10 & 11)
Ground location (0 ohm between terminal 10 and ground)
Speed signal
Wiring in circuit (speedo to control unit; speedo to rear axle)
With rear wheels raised and one rotating slowly,voltage at terminal 13 should oscillate 12V to +1.5V

2-1-1 Voltage feed or cruise control unit malfunction
Minimum 10.5 V at terminal 11

2-1-2 Malfunction in the circuit to vacuum pump or regulator
Test vacuum system first
12 V between terminal 2 and ground
12 V between terminal 10 and 11
Ignition Off, selector On: Check wiring for resistance


Mode 2: Component Test
Ignition "On", diagnostic wire connected. Start with cruise selector switch "Off" and the transmission in "Drive". Press the diagnostic button twice, each for one second. The LED shoud flash rapidly. Then perform the following tests in the order listed to test each component of the cruise control system. Faults may be pinpointed to the components or circuits noted.


Activated Component: Brake light switch
Action: Depress brake pedal for one second
Code: 1-3-2
Fault: If no code: brake light circuit


Activated Component: Selector ON and OFF, brake and clutch valve Action: Depress brake then clutch pedal for one second
Code: 1-1-3
Fault: If no code: brake and clutch valve


Activated Component: Selector RESUME
Action: Press RESUME for one second
Code: 1-2-3
Fault: If no code: resume button


Activated Component: Selector SET
Action: Press SET for one second
Code: 1-3-1
Fault: If no code: set button


Activated Component: Start inhibitor switch
Action: Shift transmission to NEUTRAL
Code: 2-2-3
Fault: If no code: start inhibitor switch

If code 3-1-1 is reported during any test: Several simultaneous signals: short in circuits



Credits til Volvoclub.co.uk for å ha samlet informasjonen.

[Joakim-G_R]

Ja, her er en link til Volvoclub.co.uk med MASSE informasjon.

http://www.volvoclub.org.uk/faq/

[Espedalen]

Kjekt med denne for de som ikke gidder å google :p

[Joakim-G_R]

Hva skal du med et norsk forum da i det heletatt, for de aller fleste problemene kan du jo google deg til.

Kjekt å samle slikt her, da det er samlet endel annet her også, som man finner ved å google.

[Larsgunnar]

Hvordan ser man tallene på feilkoden når man leser av på bilen?
Om koden f.eks er 3-2-1, blinker det 3 ganger på det "første blinket", 2 på det neste og 1 på det siste?

[Joakim-G_R]

Det er korrekt.

[Teufel]

Noen som kan hjelpe meg? HAr funnet kontakten... odb2 i midtkonsollet... hvordan går jeg frem for å søke her? er ikke så drevet på englandsk...
vilke pinner kortslutter jeg? Trenger jeg noe bryter med led?

sitter i bilen nå så viss noen leser dette og vet det så hadde det vært supert med svar... :)

940 95 mod med b23ft....

[Larsge]

http://forum.vccn.no/showthread.php?22085-HowTo-Feilkodeleser-940-OBDII-96