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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> External Pages >> Different car >> Section 136 (Hybrid Control System - Diagnosis) >> DTC P0A1D/390: Hybrid Powertrain Control Module >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ OUTPUT DTC (HV ECU) 
  1. Connect the hand-held tester to the DLC3.
  2. Turn the power switch ON (IG).
  3. Turn the hand-held tester ON.
  4. On the hand-held tester, enter the following menus: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO /CURRENT CODES.
  5. Read DTCs.

Result: DTC P0A1D (INF 390) and other DTCs are output 

HINT:

If any other codes besides P0A1D (INF 390) are output, perform troubleshooting for those DTCs first.

YES: GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

NO 

REPLACE HYBRID VEHICLE CONTROL ECU (See  HYBRID VEHICLE CONTROL ECU  ) 

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