DTC Logic
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P0037 | HO2 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 | HO2 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.) |
|
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-178, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK HO2S2 POWER SUPPLY CIRCUIT
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-179, "Component Inspection (HO2S Heater)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Replace heated oxygen sensor 2. Refer to EX-5, "Exploded View".
Component Inspection (HO2S Heater)
1.CHECK HEATED OXYGEN SENSOR 2 HEATER
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace heated oxygen sensor 2. Refer to EX-5, "Exploded View".
Refrigerant pressure sensor
Component Function Check
1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
Start engine and warm it up to normal operating temperature.
Turn A/C switch and blower fan switch ON.
Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES >> ...
Moonroof unit assembly
Inspection
WIND DEFLECTOR
Open glass lid fully
Visually check for proper installation, damaged/deteriorated components,
or foreign objects within mechanism.
Correct as required for smooth operation.
Check for grease at the wind deflector arm (1) and pivot areas. If
necessary, apply ...
Engine protection control at low engine
oil pressure
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Description
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Engine oil pressure sensor
Engine oil pressure
Engine protection control
Oil pressure warning ...