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1995 Toyota Tercel Check Engine Light stays on all the time

Tiny
ILU
  • MEMBER
  • 1995 TOYOTA TERCEL
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
Check Engine Light will not scan with Te1 and E1 shorted by a jumper on the Data Link Connector.

I have followed the repair manual; battery has 12.58 volts and the ignition to on position. Placed jumper to short ort Te1 and E1 pints on the Data Link Connector. The Check Engine Light stays on solid without give me any flashing.

With no jumper on the Te1 to E1 pins, I follow the manual to do the Check Engine Light resetting by removed the 15A Radio fuse. However, this Light still stays on.

Only able to reset this Check Engine Light is to disconnect the battery and reconnect it back. Did I do something wrong in the procedure? What component has failed on me? Please help.
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Sunday, June 21st, 2009 AT 5:21 PM

7 Replies

Tiny
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  • MECHANIC
  • 75,992 POSTS
Try the EFI fuse remove it for 10secs and see what happens-
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Sunday, June 21st, 2009 AT 5:27 PM
Tiny
ILU
  • MEMBER
  • 5 POSTS
With the EFI 15A fuse removed, the Check Engine Light finally turns off.

But, I try to scan this light for the error code with EFI fuse removed. The Check Engine Light won't flash for me.
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Sunday, June 21st, 2009 AT 5:42 PM
Tiny
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If there's trouble within the engine management system the light will comeback on constantly-till the problem is fixed-
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Sunday, June 21st, 2009 AT 5:56 PM
Tiny
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Are you referring that ECU is the problem? Thanks.
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Sunday, June 21st, 2009 AT 6:04 PM
Tiny
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  • MECHANIC
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But, I try to scan this light for the error code with EFI fuse removed. The Check Engine Light won't flash for me.

It won't flash nothing bcuz the EFI 15amp fuse powers the computer-
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Sunday, June 21st, 2009 AT 6:19 PM
Tiny
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With all the symptoms I described, do you have any idea why I could not scan for error codes? Thanks.
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Sunday, June 21st, 2009 AT 6:31 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
But, I try to scan this light for the error code with EFI fuse removed. The Check Engine Light won't flash for me.

It won't flash nothing bcuz the EFI 15amp fuse powers the computer-with no power the computer is dead. Now if the CEL is on and the 15amp EFI fuse is in place and refuses to pull code/s could be a computer problem.

If you jumper the Te-1 to E-1 and there's stored code/s it will show one of these DTC's

11 ECU Power Supply.
12 Engine RPM Signal.
13 Engine RPM Signal.
14 Ignition Signal.
21 Oxygen Sensor (OS) Signal.
22 Water Temperature Sensor (THW) Signal.
24 Intake Air Temperature Sensor (THA) Signal.
25 Air/Fuel ratio lean.
26 Air/Fuel ratio rich.
27 Sub-oxygen sensor signal.
31 Air Flow Meter Signal.
32 Air Flow Meter Signal.
41 Throttle Position Sensor (TPS).
42 Vehicle Speed Sensor (VSS) Signal.
43 Starter Circuit Signal.
51 Switch Condition Signal.
71 EGR system malfunction.
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Sunday, June 21st, 2009 AT 6:44 PM

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