Description
The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The mass air flow sensor controls the temperature of the hot wire to a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The greater air flow, the greater the heat loss.
Therefore, the electric current supplied to hot wire is changed to maintain the temperature of the hot wire as air flow increases. The ECM detects the air flow by means of this current change.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-I
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-II
Diagnosis Procedure
Regarding Wiring Diagram information
1.INSPECTION START
Confirm the detected DTC.
2.CHECK INTAKE SYSTEM
Check the following for connection.
3.CHECK GROUND CONNECTION
4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
5.DETECT MALFUNCTIONING PART
Check the following.
6.CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
7.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
8.CHECK MASS AIR FLOW SENSOR
9.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK MASS AIR FLOW SENSOR-I
With CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Without CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW VIA THE MASS AIR FLOW SENSOR
Check for the cause of uneven air flow via the mass air flow sensor. Refer to the following.
3.CHECK MASS AIR FLOW SENSOR-II
With CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Without CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
4.CHECK MASS AIR FLOW SENSOR-III
With CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
Without CONSULT
*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.
B1118 - B1120 satellite sensor LH
Description
DTC B1118 - B1120 SATELLITE SENSOR LH
The satellite sensor LH is wired to the air bag diagnosis sensor unit. The
air bag diagnosis sensor unit willmonitor the satellite sensor LH for
internal failures and its circuits for communication errors.
PART LOCATION
DTC Logic
DTC DETECTI ...
RGB synchronizing signal circuit
Description
Transmit the RGB synchronizing signal to the display unit so as to
synchronize the RGB image displayed with AV control unit.
Diagnosis Procedure
1.CHECK CONTINUITY RGB SYNCHRONIZING SIGNAL CIRCUIT
Turn ignition switch OFF.
Disconnect display unit connector M141 and AV con ...
Magnet clutch
Description
SYSTEM DESCRIPTION
A/C auto amp. controls A/C compressor operation by ambient temperature and
signal from ECM.
Low Temperature Protection Control
A/C auto amp. will turn the A/C compressor ON or OFF as determined
by a signal detected by ambient sensor.
When ambient temper ...