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Posted 08 September 2007 - 02:27 PM
Diag. connectors2.jpg 47.4K 23 downloads
Posted 08 September 2007 - 02:31 PM
If the CEL is on, do not plug any in. The ECU will flash the codes at you that are present.
If you want to see what codes have occured in the past (only really useful if the CEL is intermittent), connect the white/black connectors.
If you want to run a dealer-check mode, connect the green ones. There's actually a whole procedure for running the D-Check. So, its really not useful unless you know what the procedure is.
NOTE: The CEL doesn't flash. There's an LED on the side of the ECU that flashes.
Posted 08 September 2007 - 07:55 PM
Posted 08 September 2007 - 08:40 PM
Posted 08 September 2007 - 09:59 PM
Posted 08 September 2007 - 10:11 PM
OK, just to be sure of the procedure, connect the white connectors,(ign. off), turn ign. to "on", read stored trouble codes at the ECU LED, that's all. Right??
Posted 10 September 2007 - 07:17 PM
Posted 11 September 2007 - 09:42 AM
From the USRM:
1988 and Later Models With Single-Point Fuel Injection --
CODE PROBABLE CAUSE
11 Crank Angle Sensor or Circuit
12 Starter Switch or Circuit
13 Crank Angle Sensor or Circuit
14 Fuel Injector - Abnormal Output
21 Coolant Temperature Sensor or Circuit
23 Air Flow Meter or Circuit
24 Air Control Valve or Circuit
31 Throttle Sensor or Circuit
32 Oxygen Sensor or Circuit
33 Vehicle Speed Sensor (VSS) or Circuit
34 EGR Solenoid or Circuit
35 Purge Control Solenoid or Circuit
42 Idle Switch or Circuit
45 Kick-Down (Detent) Relay or Circuit
51 Neutral Switch Continuously in the On Position
55 EGR Temperature Sensor or Circuit
61 Parking Switch or Circuit
Posted 11 September 2007 - 10:15 AM
Posted 11 September 2007 - 12:46 PM
Posted 11 September 2007 - 02:05 PM
That's what I do. Disconnect the battery, hit the brakes (the brake lights discharge any residual electricity), and wait about 30 minutes. Then I reconnect it. That will make sure the ECU doesn't remember anything.
I gather it's not just a simple battery disconnect?
There is an actual procedure, but I never remember what it is.
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