DTC P0102:00 [MZR-CD 2.2]

id0102f3700900

DTC P0102:00

MAF sensor circuit low input
DETECTION CONDITION
•  The PCM monitors the input signal from the MAF sensor. If the voltage from the MAF sensor is less than 0.1 V, the PCM determines that there is a malfunction in the MAF sensor circuit.
MONITORING CONDITIONS
―  Battery voltage: 8—20 V
Diagnostic support note
•  The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  MAF/IAT sensor connector or terminals malfunction
•  MAF sensor malfunction
•  Short to ground or open circuit in wiring harness between main relay and MAF/IAT sensor
―  Short to ground in wiring harness between INJ 15 A fuse and MAF/IAT sensor terminal A
―  INJ 15 A fuse malfunction
―  Open circuit in wiring harness between main relay terminal C and MAF/IAT sensor terminal A
•  Short to ground in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1V
•  PCM connector or terminals malfunction
•  MAF sensor signal circuit and ground circuit are shorted to each other.
•  Open circuit in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1V
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the KOEO or KOER self test.
•  Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
•  Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure.
4
INSPECT MAF/IAT SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the MAF/IAT sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
5
INSPECT MAF SENSOR
•  Inspect the MAF sensor.
•  Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 11.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
6
INSPECT MAF SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
•  Switch the ignition to off.
•  Disconnect the MAF/IAT sensor connector.
•  Switch the ignition to ON (engine off).
•  Measure the voltage at the MAF/IAT sensor terminal A (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the INJ 15 A fuse.
•  If the fuse is melt:
―  Repair or replace the wiring harness for a possible short to ground.
―  Replace the fuse.
•  If the fuse is deterioration:
―  Replace the fuse.
•  If the fuse is normal:
―  Repair or replace the wiring harness for a possible open circuit.
Go to Step 11.
7
INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  MAF/IAT sensor connector is disconnected.
•  Switch the ignition to off.
•  Inspect for continuity between MAF/IAT sensor terminal C (wiring harness-side) and body ground.
•  Is there continuity?
Yes
If the short to ground circuit could be detected:
•  Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 11.
No
Go to the next step.
8
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
9
INSPECT MAF SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
•  MAF/IAT sensor and PCM connectors are disconnected.
•  Inspect for continuity between MAF/IAT sensor terminals C and B (wiring harness-side).
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to each other, then go to Step 11.
No
Go to the next step.
10
INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  MAF/IAT sensor and PCM connectors are disconnected.
•  Inspect for continuity between MAF/IAT sensor terminal C (wiring harness-side) and PCM terminal 1V (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or the replace the wiring harness for a possible open circuit, then go to the next step.
11
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the KOEO or KOER self test.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
12
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.