•
Engine running (over 400 rpm):
Lower LED is steady green:
Good, the crank trigger is functioning properly.
Lower LED flashes red every so often:
The
TECgt
is getting a bad signal from the crank trigger. The engine
most likely misfires whenever the light flashes red.
•
Engine is Hitting Rev Limiter:
Lower LED changes color turns orange:
The first or second stage of the rev limiter is occurring.
Lower LED turns red:
The third (and final) rev limiter stage is occurring.
Note:
If a misfire occurs during normal engine operation, but the lower LED on the
TECgt
was not observed to
momentarily flash red, the crank sensor may be at fault. To test for errors in this situation, turn the engine
off without removing power from the
TECgt
ECU (this can be accomplished by unplugging the fuel
injector harness, or by hitting the letter “K” from the engine monitor screen when using a laptop). If the
lower LED is flashing red after the engine is shut off, there was a crank sensor problem at some point
during the run.
I.2. Trouble Codes from the Check Engine Output
The trouble codes from the check engine output are related to the engine sensors. If the check
engine output wire is connected to a light bulb, it will display a sequence of flashes depending on the
problem. The diagnostic codes are arranged such that there are two digits for each code. The check engine
light will give long duration flashes for the first digit of the code and short duration flashes for the second
digit. See
Figure H.2.1
for a graphical representation of the flash sequence. Here are the diagnostic
codes(asterisked items are not available with the first software release):
•
12:
Crank Trigger Error
•
13:
Cam Trigger Error
•
14:
ECU Internal Failure*
•
21:
Throttle Position Sensor High
•
22:
Throttle Position Sensor Low
•
23:
Manifold Air Pressure Sensor High
•
24:
Manifold Air Pressure Sensor Low
•
25: Coolant Temperature Sensor High
•
26:
Coolant Temperature Sensor Low
•
31:
Manifold Air Temperature Sensor High
•
32:
Manifold Air Temperature Sensor Low
•
33:
High Battery Voltage
•
34:
Low Battery Voltage
•
35:
Knock too Long
•
37:
Exhaust Gas Oxygen Sensor Lean too Long
•
38:
Exhaust Gas Oxygen Sensor Rich too Long*
•
41:
GP I/O 6 Input High*
•
42:
GP I/O 6 Input Low*
•
43:
GP I/O 7 Input High*
•
44:
GP I/O 7 Input Low*
______________________________________________________________________________________
TECgt Manual Version 2.0
- Page 105 -
©2008 Electromotive, Inc.
