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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2002 ram 1500
- jerry r
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- Tyler
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- Full time HACK since 2012
5 years 4 weeks ago #43618
by Tyler
Replied by Tyler on topic 2002 ram 1500
When you were looking at the scan data for the ECT, were you on the OE side, or Global data?
If OE, then it wouldn't surprise me if that ECT PID defaults to -40 with the ECT circuit code set, despite whatever you may be doing to it with a jumper wire.
For fun, try installing the jumper then turning the key off. Leave it off for 5-10 seconds, then turn the key on and clear codes. What code do you now get, and what does the ECT PID say?
If OE, then it wouldn't surprise me if that ECT PID defaults to -40 with the ECT circuit code set, despite whatever you may be doing to it with a jumper wire.
For fun, try installing the jumper then turning the key off. Leave it off for 5-10 seconds, then turn the key on and clear codes. What code do you now get, and what does the ECT PID say? Please Log in or Create an account to join the conversation.
- jerry r
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Topic Author
- Offline
- Senior Member
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- Tyler
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- Offline
- Moderator
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- Full time HACK since 2012
5 years 4 weeks ago #43621
by Tyler
Good! Global shouldn't be allowing for any substituted value goofiness.
When you installed the jumper on the ECT connector, did the voltage on the signal wire actually go to 0V? As in, could you measure the drop with a DMM? If it did drop, that may be a strike against the PCM.
If it didn't, the ECT ground may suck. Redo the jumper test with one end on the ECT signal, and the other to B-.
Replied by Tyler on topic 2002 ram 1500
jerry r wrote: On global
Good! Global shouldn't be allowing for any substituted value goofiness.
When you installed the jumper on the ECT connector, did the voltage on the signal wire actually go to 0V? As in, could you measure the drop with a DMM? If it did drop, that may be a strike against the PCM.
If it didn't, the ECT ground may suck. Redo the jumper test with one end on the ECT signal, and the other to B-. Please Log in or Create an account to join the conversation.
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