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DTC Description
 
 
DTC DETECTION LOGIC
DTC No.M.U.T.-III SE screen items
(Trouble diagnosis content)
DTC detection condition
B121A–11FR FOG LIGHT LH PWR SPLY CIRC
(Front fog light left hand power supply circuit)
[CIRCUIT SHORT TO GROUND]Diagnosis conditionWhen front fog light ON conditions are satisfied (smart FET inside IPDM E/R is ON)
Signal (terminal)Front fog light LH power supply circuit
ThresholdOvercurrent is detected
Diagnosis delay time1 second or less
 
 
POSSIBLE CAUSE
  • Harness or connector
  • Front fog light LH
    • LED
  • IPDM E/R
 
 
FAIL-SAFE
Shuts off the power supply to the front fog light LH power supply circuit until the front fog light ON conditions are no longer satisfied.
 
 
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
With M.U.T.-III SE
  1. Ignition switch ON.
  2. Select “Fr fog light (LH) circ malfunctn” in “Data List” mode of “IPDM E/R” using M.U.T.-III SE.
  3. Check the monitor status.
    Monitor itemMonitor status
    Fr fog light (LH) circ malfunctn0
    1
What is the monitor status?
: .
: A short circuit is detected multiple times in the front fog light LH power supply circuit, and damage accumulates at the smart FET inside the IPDM E/R. For this reason, IPDM E/R does not turn ON the smart FET. Because the DTC cannot be reproduced in this state, perform Diagnosis Procedure and replace IPDM E/R after the malfunctioning part is repaired. Refer to Removal and Installation.
 
2.PERFORM DTC CONFIRMATION PROCEDURE
With M.U.T.-III SE
  1. Ignition switch OFF.
  2. Ignition switch ON.
  3. Turn lighting switch 2ND, and front fog light switch ON.
  4. Select “Self Diagnostic Result” mode of “IPDM E/R” using M.U.T.-III SE.
  5. Check DTC.
Is DTC detected?
Refer to Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END