DTC Description
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
P0037 | HO2S2 HTR (B1) (HO2S heater control circuit low bank 1 sensor 2) | The current amperage in the heated oxygen sensor 2 heater circuit is
out
of the normal range.
(An excessively low voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) |
P0038 | HO2S2 HTR (B1) (HO2S heater control circuit high bank 1 sensor 2) | The current amperage in the heated oxygen sensor 2 heater circuit is
out
of the normal range.
(An excessively high voltage signal is sent to ECM through the heated oxygen sensor 2 heater.) |
POSSIBLE CAUSE
DTC P0037
TC P0038
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.
TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected? YES >> Proceed to EC-188, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK HO2S2 POWER SUPPLY CIR
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace error-detected parts.
3.CHECK HEATED OXYGEN SENSOR 2 HEATER
Check the heated oxygen sensor 2 heater. Refer to EC-189, "Component Inspection".
Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 4.
4.REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to EX-5, "Exploded View".
CAUTION:
>> INSPECTION END
5.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK HEATED OXYGEN SENSOR 2 HEATER
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to EX-5, "Exploded View".
CAUTION:
>> INSPECTION END
Inspection and adjustment
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description
When replacing the occupant classification system control unit, perform
zero point reset procedure. Refer to
SRC-42, "ZERO POINT RESET : Special Repair Requirement".
When ...
Precaution
Precaution for supplemental restraint system (srs) "air bag" and "seat
belt
pre-tensioner"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT
PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the
...
Diagnosis system (air bag)
Description
CAUTION:
Never use electrical test equipment on any circuit related to
the SRS unless instructed in this Service
Manual. SRS wiring harnesses can be identified by yellow and/or orange
harnesses or harness
connectors.
Never repair, splice or modify the SRS wir ...