Test Description

Number(s) below refer to the step number(s) on the Diagnostic Chart .

1. 2. A "No RPL" condition accompanied by a no-start condition suggests a faulty ECM ignition feed or battery feed circuit.
2. 9. Using a test light connected to B+, probe each of the ECM ground terminals to ensure that a good ground is present. Refer to ECM Terminal End View for terminal locations of the ECM ground circuits.
3. 12. In this step, temporarily substitute a known good relay for the ECM relay. The horn relay is nearby, and it can be verified as "good" simply by honking the horn. Replace the horn relay after completing this step.
4. 17. This vehicle is equipped with a ECM which utilizes an electrically erasable programmable read only memory (EEPROM). When the ECM is replaced, the new ECM must be programmed. Refer to Engine Control Module (ECM) .

Fig 1: Identifying No Reduced Power Lamp (RPL) Chart (1 Of 2)

Courtesy of ISUZU MOTOR CO.

Fig 2: Identifying No Reduced Power Lamp (RPL) Chart (2 Of 2)

Courtesy of ISUZU MOTOR CO.