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Home >> Isuzu >> 1998 >> Trooper S, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Transfer Case Diagnosis - Torque On-Demand >> Fault Diagnosis From Tod Indicator >> All Tod Indicator Lights & Check Light Are Lit, & Go Off Momentarily At 2-Second Intervals

All Tod Indicator Lights & Check Light Are Lit, & Go Off Momentarily At 2-Second Intervals

  1. Turn ignition on. Backprobe ECU connector and measure voltage between ECU terminals No. 1 and 19. If battery voltage exists, replace ECU. Go to next step. If battery voltage does not exist, check battery circuit. Go to next step.
  2. Ensure all mechanical and electrical components are mounted correctly. Clear DTC. If all components are mounted correctly, test is complete. Recheck system operation. If any components are not mounted correctly, repair or replace as needed. Repeat drive test and see if symptom is repeated.
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