Sitat:
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.
Sitat:
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
