jjrbus Posted May 10, 2016 Share Posted May 10, 2016 Should a 93 Toyota pickup, V6, automatic have a Check Engine light? It is the instrument cluster without a tach. Quote Link to comment Share on other sites More sharing options...
payaso del mar Posted May 10, 2016 Share Posted May 10, 2016 I would think so. my '85 chassis with 4 cyl engine and manual trans has one....i'd expect a newer and more sophisticated drivetrain would too. Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 10, 2016 Author Share Posted May 10, 2016 When I take a break I read about no start issues and the Check engine light is referenced. In the manual the instrument cluster does not show a check engine light, but does show a malfunction indicator lamp. Later in the manual it shows a check engine light symbol? Mine is not lighting up when I turn the key to on. Jim Quote Link to comment Share on other sites More sharing options...
payaso del mar Posted May 10, 2016 Share Posted May 10, 2016 maybe check the "check engine" light? unplug a sensor that you know should generate a code and see if light comes on? Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted May 13, 2016 Share Posted May 13, 2016 it should have CEL, and it does. If should illuminate when you turn the ignition key on and before you start. Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 13, 2016 Author Share Posted May 13, 2016 Yup, 93 has a CEL. I pulled my instrument cluster and bulb was good. Grounding the W wire at the ECM causes the CEL to come on! The first time I tried grounding it I must not have had a good connection. Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted May 13, 2016 Share Posted May 13, 2016 does the cel come on with the ignition switch on - engine not running? I guess you could set the jumpers to see of the cel will flash - as in reading a cel code. it should flash with the jumper even of no codes are set. Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 14, 2016 Author Share Posted May 14, 2016 No it does not come on. Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted May 14, 2016 Share Posted May 14, 2016 and bulb test good? Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 15, 2016 Author Share Posted May 15, 2016 Yes bulb tests good and will light when connected to ground at EMC plug. Does not come on when turning on ign or jumping diagnostic connector. All of this is leading me believe I have a bad ECM! Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted May 17, 2016 Share Posted May 17, 2016 On 2016-05-15 at 1:01 PM, jjrbus said: Yes bulb tests good and will light when connected to ground at EMC plug. Does not come on when turning on ign or jumping diagnostic connector. All of this is leading me believe I have a bad ECM! if the engine runs and especially if it runs well, I would look elsewhere. How bout the other in dash lights? I would compare with a service manual to see ---could be as simple as a bad bulb socket. When the CEL flashes, the overdrive off light should also flash ( unless OD off button is pushed in). Me experience reading CEL codes is that it is touchy getting a good connection on the TE2/E1 jumper. It is easy to push the TE2/E1 connectors back, which also makes establishing a good contact challenging. I have never looked at my in dash lights - hopefully I will not have too I am assuming a V6/auto, so the OD off light is something easy to check. Start the engine I push in the button on the gear shift lever & the OD off light should illuminate. Good luck, a bad connection can be hard to run down. Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 17, 2016 Author Share Posted May 17, 2016 Thanks for the reply, but will not start, no spark! Looks like I will be sending the ECM for diagnosis tomorrow. Jim Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted May 17, 2016 Share Posted May 17, 2016 the service manual has a detailed diagnosis to check ecm,s Quote Link to comment Share on other sites More sharing options...
jjrbus Posted May 17, 2016 Author Share Posted May 17, 2016 As near as I can tell the FSM in many cases cannot pinpoint a defective ECM. A little disclaimer I am not a mechanic nor have an electronics back ground! Quote Link to comment Share on other sites More sharing options...
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