Quote:
Originally Posted by pawoSD
How do you read the codes? I know where the diagnostic plug is and the little button + red LED, but I don't know how to use it.
The linkage seems to move ok, I also added lube when I was working on it.
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Search engine is your friend, got this from a post:
The engine needs to be off, but the key must be in the "on" position.
Hold down the button for 3 - 4 seconds and count the blinks. The number of blinks is the code. Repeat the process again. If you get the same number of blinks, you have just one code. If you get a different number of blinks, then you have more than one code.
When finished, turn the key off, then back on, and hold down the button for 6-8 seconds. When you start the car back up, the CE light will be off.
The only codes that will cause a check engine light to illuminate are codes relating to smog equipment. Your ECU will hold a lot of codes that will not cause that light to come on.
91-93 190E and 300 series (2.6L and 3.0L)
1 No faults in system.
2 Throttle valve switch(full throttle contact).
3 Coolant temp sensor.
4 Airflow sensor potentiometer.
5 Oxygen sensor.
7 TNA (RPM) signal.
8 Altitude pressure signal from EZL Ignition control unit.
9 Current to Electro-hydraulic actuator.
10 Throttle valve switch(idle contact).
11 Air injection system.
12 Absolute pressure valves from ELZ ignition control unit.
13 Intake air temp signal.
14 Road speed signal at CIS-E control unit.
16 EGR.
17 Oxygen sensor signal.
18 Current to idle speed air valve.
22 Oxygen sensor heating current.
23 Short to positive in regeneration switch over valve circuit.
25 Short to positive in start valve circuit.
26 Short to positive in shift point retard circuit.
27 Data exchange fault between CIS-E control unit and EZL ignition control unit.
28 Loose contact in coolant temp sensor circuit.
29 Difference in coolant temps between CIS-Eunit and EZL unit.
31 Loose contact in intake air temp sensor circuit.
34 Faulty coolant temp sensor signal from EZL unit.
The code will immediately or eventually come back if you don't resolve it.
My linkage looked fine too but complete removal, cleaning, and lubing the pins, joints, and moving parts resolved my idle issues. Merely spraying it with WD40 did not.