DTC DETECTION LOGIC
DTC No. | Trouble diagnosis (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P2096 | POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo lean bank 1) | The output voltage computed by ECM from the A/F sensor 1 signa is shifts to the lean side for a specified period. |
|
P2097 | POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo rich bank 1) | The A/F signal computed by ECM from the A/F sensor 1 signal is shifts to the rich side for a specified period. |
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following 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
Is 1st trip DTC detected?
YES >> Go to EC, "Diagnosis Procedure".
NO >> INSPECTION END
1.CHECK GROUND CONNECTION
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1 AND HEATED OXYGEN SENSOR 2
Loosen and retighten the A/F sensor 1 and heated oxygen sensor 2. Refer to EM, "Exploded View" and EX, "Exploded View".
>> GO TO 3.
3.CHECK FOR EXHAUST GAS LEAK
Is exhaust gas leak detected?
YES >> Repair or replace.
NO >> GO TO 4.
4.CHECK FOR INTAKE AIR LEAK
Is intake air leak detected?
YES >> Repair or replace.
NO >> GO TO 5.
5.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Is the 1st trip DTC P0171 or P0172 detected? Is it difficult to start engine?
YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC, "Diagnosis Procedure" or EC, "Diagnosis Procedure".
NO >> GO TO 6.
6.CHECK HARNESS CONNECTOR
Water should not exit.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace harness connector.
7.CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
>> Repair or replace harness or connectors.
9.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK A/F SENSOR 1 HEATER
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> GO TO 13.
11.CHECK HEATED OXYGEN SENSOR 2
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> Replace malfunctioning heated oxygen sensor 2.
12.CHECK INTERMITTENT INCIDENT
Perform GI, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair or replace.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to EM, "Exploded View".
CAUTION:
Do you have CONSULT?
YES >> GO TO 14.
NO >> GO TO 15.
14.CONFIRM A/F ADJUSTMENT DATA
With CONSULT
Is "0.000" displayed?
YES >> INSPECTION END
NO >> GO TO 15.
15.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to EC, "Work Procedure".
Do you have CONSULT?
YES >> GO TO 16.
NO >> INSPECTION END
16.CONFIRM A/F ADJUSTMENT DATA
With CONSULT
>> INSPECTION END
Meters and gauges
Type A (if so equipped)
1. Tachometer
2. Speedometer
3. Fuel gauge
4. Odometer
Twin trip odometer
Trip computer
5. Continuously Variable Transmission
(CVT) position indicator (if so equipped)
Automatic Transmission (A/T) position
indicator (if so equipped)
6. Instrument brightness con ...
Precautions
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
driver and ...