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DTC Description
 
 
DTC DETECTION LOGIC
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P155B00Electrical energy management system
(Electrical energy management system)
Diagnosis conditionIgnition switch ON
Signal (terminal)ECM power supply
ThresholdBattery voltage measured by ECM below or above threshold.
Diagnosis delay time20 seconds or more
 
 
POSSIBLE CAUSE
  • Harness or connectors
  • ECM
  • IPDM E/R
  • Battery
  • Generator
 
 
FAIL-SAFE
Not applicable
 
 
CONFIRMATION PROCEDURE
1.CHECK DTC PRIORITY
If DTC P155B is displayed with DTC P155E and P155F first perform the trouble diagnosis for DTC P155E andP155F.
Witch DTC is detected?
Perform diagnosis of applicable.
.
 
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
: .
 
3.DTC CONFIRMATION PROCEDURE
  1. Start engine and let it idle for at least 20 seconds.
  2. Check DTC.
Witch DTC is detected?
Refer to DTC Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END