Without A Scan Tool
DIAGNOSTIC TROUBLE CODE OUTPUTTo obtain an output of diagnostic trouble codes, proceed as follows:
1. Initial conditions:
- Battery voltage 11.0 VOLTS or more
- Throttle valve fully closed (throttle position sensor IDL points closed)
- Transmission in neutral position
- Accessories switches OFF
- Engine at normal operating temperature
2. Turn the ignition switch ON.
NOTICE: DO NOT start the engine.
3. Using a jumper wire (or SST# 09843-18020), connect terminals TE1 and E1 of the DLC1.
Malfunction Indicator Lamp (MIL) Location:
4. Read the diagnostic trouble code as indicated by the number of flashes of the MIL. (Refer to "DECODING MIL OUTPUT", below.
5. After the trouble code check, remove the jumper from the DLC1.
DECODING MIL OUTPUT
Normal System Operation (no malfunction):
"Normal System Operation" Flash Pattern:
- The light will alternately blink ON and OFF at 0.26 second intervals.
Trouble Code Indication:
MIL Flash Patterns For DTC 13 And DTC 31:
- In the event of a malfunction, the duration the each light will blink (ON time) is 0.52 seconds.
- The number of the first "group" of blinks will equal the 1st digit of a 2 digit diagnostic trouble code.
- After a 1.5 second pause, the 2nd number of blinks will equal the second digit.
- When 2 or more codes are indicated, the lowest number (code) will appear first, followed a 2.5 second pause, then the next lowest numbered code, etc.
- After all the codes have been output, there will be a 4.5 second pause and they will all be repeated as long the terminals TE1 and E1 of the DLC1 are connected.
- All detected diagnostic trouble codes, except code No.51, will be retained in memory by the ECM from the time of detection until canceled out.
- Once the malfunction is corrected, the MIL on the instrument panel will go OFF but the diagnostic trouble code(s) will remain stored in ECM memory (except for code No.16 and 51).