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88runner a code 42??????

Old 06-09-2019, 11:59 AM
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88runner a code 42??????

Hi everyone!
88runner (all orig no mods)
22re 4x4 manual showing a OBD I code 42 (vss speed sensor)
How is that possible?
i am so bewildered
HELP
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Old 06-10-2019, 06:43 PM
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Does your speedometer work?

Since your 1988 4Runner has a cable driven speedometer, there is a Vehicle Speed Sensor (VSS) built into the gauge cluster that gives the Engine Computer the Vehicle's speed to help it work it's magic.

According to the 22R-E Diagnostic Code chart on 4Crawler's website, code 42 is described as: VEHICLE SPEED SENSOR SIGNAL CIRCUIT--NO SPD. SIGNAL FOR SEVERAL SECONDS WHILE VEHICLE IS OPERATED UNDER HEAVY LOAD (TPS/MAP/AIR FLOW INPUTS).

This could be due to a bad wire, a poor connection, a bad speed sensor in the gauge cluster, or in rare cases, the ECU.

I don't have a 1988 Factory Repair Manual, , so I am not sure what the procedure is for checking the speed sensor, but a 1993 Factory Repair Manual says this:
2. INSPECT SPEED SENSOR
Check that there is continuity between terminals A and B
four times par each revolution of the speedometer shaft.
If operation is not as specified, replace the speedometer.



Maybe someone with a 1988 FRM can post up the procedure with the correct terminal locations for your 4Runner.


Last edited by old87yota; 06-10-2019 at 06:48 PM. Reason: Technical Difficulties....
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Old 06-11-2019, 07:05 AM
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Thanks so much for your expertise!
I have FSM and I know the procedure to check out all your suggestions
Going to get to work on this...
Your awesome :-)
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Old 06-11-2019, 07:08 AM
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I forgot to answer
Yes the speedometer does work.
Later
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