Indication Method Of Trouble Code

• Turn on the starter switch, while the engine does not start.
• Short-circuit terminal 8 of the self-diagnostic connector to GND (terminal 4 or 5) to display the trouble code on the CHECK lamp.
  Fig 1: Identifying Diagnostic Trouble Code Connector & Terminals

  Courtesy of ISUZU MOTOR CO.
• If no trouble codes exist, code "12" is displayed continuously.
• If trouble codes exist, code "12" is displayed three times, and the trouble codes, starting from the smaller code number, are displayed three times respectively.

Fig 2: Diagnostic Trouble Code Reading & Display Chart

Courtesy of ISUZU MOTOR CO.