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Home >> Toyota >> 2016 >> Corolla S, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Charging System (2ZR-FAE) - Diagnostic Codes & Symptom Tests (Model Code: ZRE172)) >> Charging System >> DTC P1602: Deterioration of Battery [08/2013 - ] >> Description

DTC P1602: Deterioration of Battery [08/2013 - ]: Description

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The generator control ECU assembly monitors battery conditions. If the voltage drops below a certain value while the engine is running (not cranking), the generator control ECU assembly determines that the battery is deteriorated and stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1602 Deterioration of Battery Battery capacity is abnormally low for 10 seconds or more when the engine is running (not cranking)
(1 trip detection logic)
  • Battery
  • Wire harness or connector
Does not come on DTC stored