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Gasoline System Testing: TD-Signal

  1. Disconnect CIS-E control unit plug. Start engine. Check voltage between terminal No. 25 of control unit plug and ground. Voltage reading should be between 6-12 volts. If okay, test is complete. If not okay, proceed to next step.
  2. Unplug fuel pump relay. Check wire between terminal No. 10 of relay plug and terminal No. 25 on CIS-E control unit plug for continuity. Resistance reading should be zero ohms. If resistance is zero ohms, check wires to ignition control module for continuity.
  3. If resistance is not as specified in step 2), repair open circuit in wiring harness.
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