DTC P1602 2AD-FHV

DTC    P1602    Deterioration of Battery

 

Description

The ECM determines the battery level according to the voltage of the BATT terminal while the engine is running (not cranking).
Toyota fault code list DTC P1602

DTC No. DTC Detection Condition Trouble Area
P1602 Battery level is 0%
  1. Battery
  2. ECM back-up power source circuit

Inspection procedure

1.INSPECT BATTERY

  1. Inspect battery voltage.

    1. After the vehicle is driven for 20 minutes, stop the engine.

    2. Turn the ignition switch on (IG) and, turn on the headlight, blower fan, and defogger for 1 minute.

    3. Turn the ignition switch off.

    4. Measure the battery voltage.

       

      Standard voltage:

      12.5 to 12.9 V at 20°C (68°F)

     

 

  NG  
REPLACE BATTERY
 
OK  
   
CHECK ECM BACK-UP POWER SOURCE CIRCUIT 
2AD-FHV