DTC P0103:00 [MZR-CD 2.2]

DTC P0103:00	Mass airflow (MAF) sensor circuit high input
DETECTION CONDITION	• The PCM monitors the input signal from the airflow sensor. If the voltage from the airflow sensor is more than 4.7 V, the PCM determines that there is a malfunction in the intake air temperature sensor No. 2 circuit. Monitoring condition • Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (mode2) and snapshot data are available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• MAF/IAT sensor connector or terminal malfunction • Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1V • MAF sensor malfunction • PCM connector or terminal malfunction • Open circuit in wiring harness between MAF/IAT sensor terminal B and PCM terminal 1Y • PCM malfunction

DTC P0103:00

Mass airflow (MAF) sensor circuit high input

DETECTION CONDITION

• The PCM monitors the input signal from the airflow sensor. If the voltage from the airflow sensor is more than 4.7 V, the PCM determines that there is a malfunction in the intake air temperature sensor No. 2 circuit.

Monitoring condition

• Battery voltage: 8—20 V

Diagnostic support note

• The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.

• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA (mode2) and snapshot data are available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• MAF/IAT sensor connector or terminal malfunction

• Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1V

• MAF sensor malfunction

• PCM connector or terminal malfunction

• Open circuit in wiring harness between MAF/IAT sensor terminal B and PCM terminal 1Y

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED • Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA (mode2) and 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 the 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 SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the M-MDS to the DLC-2. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the PENDING CODE for this DTC present?	Yes	Go to the next step.
No	Intermittent concern exists. Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4	INSPECT MAF/IAT SENSOR CONNECTOR FOR POOR CONNECTION • 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 terminal, then go to Step 9.
No	Go to the next step.
5	INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Switch the ignition to ON (Engine off). • Measure the voltage between MAF sensor terminal C (wiring harness-side) and body ground. • Is the voltage more than 4.7 V?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
No	Go to the next step.
6	INSPECT MAF SENSOR • Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Replace the MAF/IAT sensor, then go to Step 9. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 9.
No	Go to the next step.
8	INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Switch the ignition to off. • Inspect for continuity between MAF sensor terminal B (wiring harness-side) and PCM terminal 1Y (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0103:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the PENDING CODE for this 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.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED

• Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform the repair or diagnosis according to the available Service Information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?

• Connect the M-MDS to the DLC-2.

• Clear the DTC from the PCM memory using the M-MDS.

• Start the engine.

• Is the PENDING CODE for this DTC present?

Yes

Go to the next step.

Intermittent concern exists.

Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.

(See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)

INSPECT MAF/IAT SENSOR CONNECTOR FOR POOR CONNECTION

• 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 terminal, then go to Step 9.

Go to the next step.

INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

• Switch the ignition to ON (Engine off).

• Measure the voltage between MAF sensor terminal C (wiring harness-side) and body ground.

• Is the voltage more than 4.7 V?

Yes

Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.

Go to the next step.

INSPECT MAF SENSOR

• Inspect the MAF sensor.

(See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZR-CD 2.2].)

• Is there any malfunction?

Yes

Replace the MAF/IAT sensor, then go to Step 9.

(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

INSPECT PCM CONNECTOR FOR POOR CONNECTION

• Switch the ignition to off.

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the terminal, then go to Step 9.

Go to the next step.

INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT

• Switch the ignition to off.

• Inspect for continuity between MAF sensor terminal B (wiring harness-side) and PCM terminal 1Y (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

Repair or replace the wiring harness for a possible open circuit, then go to the next step.

VERIFY TROUBLESHOOTING OF DTC P0103:00 COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Start the engine.

• Is the PENDING CODE for this DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [MZR-CD 2.2].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZR-CD 2.2].)

DTC troubleshooting completed.