[Previous][Next]
DTC Description
 
 
DTC DETECTION LOGIC
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal is not inordinately low.
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P013100HO2S1 (B1)
(O2 sensor circuit low voltage bank 1 sensor 1)
Diagnosis condition—
Signal (terminal)A/F sensor 1 signal
ThresholdThe A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 0 V
Diagnosis delay time—
 
 
POSSIBLE CAUSE
  • Harness or connectors (The A/F sensor 1 circuit is open or shorted.)
  • The A/F sensor 1
 
 
FAIL-SAFE
Not applicable
 
 
DTC Confirmation Procedure
1.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 10.5 V at idle.
: .
 
2.CHECK A/F SENSOR FUNCTION
With M.U.T.-III SE
  1. Start engine and warm it up to normal operating temperature.
  2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” using M.U.T.-III SE.
  3. Check “A/F SEN1 (B1)” indication.
 
With GST
Follow the procedure “With M.U.T.-III SE” above.
 
Is the indication constantly approx. 0 V?
Proceed to DTC Diagnosis Procedure
.
 
3.PERFORM DTC CONFIRMATION PROCEDURE
With M.U.T.-III SE
  1. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
  2. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.
    cautionAlways drive vehicle at a safe speed.
  3. Maintain the following conditions for about 20 consecutive seconds.
    ENG SPEED1,000 - 3,200 rpm
    VHCL SPEED SEMore than 40 km/h (25 mph)
    B/FUEL SCHDL1.5 - 9.0 msec
    Selector leverSuitable position
    note
    • Keep the accelerator pedal as steady as possible during the cruising.
    • If this procedure is not completed within 1 minute after restarting engine at step 1, return to step 1.
  4. Check 1st trip DTC.
 
With GST
Follow the procedure “With M.U.T.-III SE” above.
 
Is 1st trip DTC detected?
Proceed to DTC Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END