On Board Diagnostic Check

This test determines if the transmission or its input or output connections or sensors are failing.

1. Connect the Tech 2: Go through Tech 2 OBD II CONNECTION.
2. Turn on the ignition but not the engine.
3. Push "FO" on Tech 2 to see the Diagnostic Trouble Code (DTC):
4. Do you have a DTC?

YES: write down all code numbers and do the DTC CHECK

NO: the DTC can not help you find the problem.

1. Go through "CHECK TRANS" CHECK
2. If it is flashing and the flash is 0.4 seconds ON and 0.4 seconds OFF, this means that you should have a DTC stored. Please recheck go to DIAGNOSTIC CHECK and if you find the same problem, replace the Powertrain Control Module (TCM).

Fig 1: Blinking Pattern Of Check Trans Indicator (Normal)

Courtesy of ISUZU MOTOR CO.

Fig 2: Blinking Pattern Of Check Trans Indicator (Abnormal)

Courtesy of ISUZU MOTOR CO.