Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
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).
| DTC No. | DTC Detection Condition | Trouble Area |
| P1602 | Battery level is 0% | Battery ECM back-up power source circuit |
INSPECTION PROCEDURE
| 1.INSPECT BATTERY |
Inspect battery voltage.
After the vehicle is driven for 20 minutes, stop the engine.
Turn the engine switch ON (IG), and turn on the headlight, blower fan, and defogger for 1 minute.
Turn the engine switch OFF.
Measure the battery voltage.
- Standard voltage:
- 12.5 to 12.9 V at 20°C (68°F)
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| OK | ||
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LEXUS IS250, IS220d / GSE20 ALE20