DTC P1602-00: Deterioration of Battery Low Capacity [09/2022 - ]: Procedure

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CHECK CHARGING SYSTEM
Refer to ON-VEHICLE INSPECTION [09/2022 - ]

Result

Proceed to

OK

NG

Result:

NG

REPAIR OR REPLACE CHARGING SYSTEM

Result:

OK

See step 2

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

Disconnect the ECM connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to ECM)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
A139-1 (BATT) - Body ground	Always	11 to 14 V

Result

Proceed to
OK
NG

Result:

CHECK FOR INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR