DTC Description
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
P0102 | MAF SEN/CIRCUIT-B1 (Mass or volume air flow ″A″ circuit low) | An excessively low voltage from the mass air flow sensor is sent to ECM. |
P0103 | MAF SEN/CIRCUIT-B1 (Mass or volume air flow ″A″ circuit high) | An excessively high voltage from the mass air flow sensor is sent to ECM. |
POSSIBLE CAUSE
DTC P0102
DTC P0103
FAIL-SAFE
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
Which DTC is detected? P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-1
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-2
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.INSPECTION START
Confirm the detected DTC.
Which DTC is detected? P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.CHECK INTAKE SYSTEM
Check the following for connection.
Is the inspection result normal? YES >> GO TO 3.
NO >> Reconnect the parts. Refer to EM-24, "Exploded View".
3.CHECK MAF SENSOR POWER SUPPLY
Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Perform EC-484, "Diagnosis Procedure".
Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
5.CHECK MAF SENSOR GROUND CIRCUIT
Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR
Check the MAF sensor. Refer to EC-200, "Component Inspection".
Is the inspection result normal? YES >> GO TO 8.
NO >> Replace mass air flow sensor. Refer to EM-24, "Exploded View".
8.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK MASS AIR FLOW SENSOR-1
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rpm | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK MASS AIR FLOW SENSOR-2
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rpm | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-3
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rp | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> Clean or replace mass air flow sensor. Refer to EM-24, "Exploded View".
How to use the vehicle information display
The vehicle information display can be changed
using the buttons and ENTER located
on
the steering wheel.
— navigate through the
items in vehicle
information
ENTER — change or select an item in the
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