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Home >> Toyota >> 1995 >> Tercel Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Testing >> Code P1600 - ECM Batt Malfunction >> Diagnosis & Repair

Diagnosis & Repair

  1. Ensure ignition is off (LOCK position). Access ECM. ECM is located behind glove box. Using DVOM, measure voltage between BATT terminal of ECM connector and ground. See Figure. If voltage is 9-14 volts, replace ECM and retest. If voltage is NOT 9-14 volts, go to next test.
  2. Remove and inspect EFI fuse. EFI fuse is located in engine compartment fuse box. Replace as needed. If fuse is okay, inspect circuit between EFI fuse and ECM. See the WIRING DIAGRAMS article. Repair as needed.
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