DTC P0103:00 [MZR 1.3, MZR 1.5]

id0102f8701000

DTC P0103:00

MAF sensor circuit high input

DETECTION CONDITION

•  If the input voltage is more than 4.9 V, the PCM determines that the MAF sensor circuit has a malfunction.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  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

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 2V

•  MAF sensor power supply circuit and signal circuit are shorted to each other

•  Open circuit in wiring harness between MAF/IAT sensor terminal B and PCM terminal 2U

•  MAF sensor malfunction

•  PCM malfunction

DTC P0103:00	MAF sensor circuit high input
DETECTION CONDITION	• If the input voltage is more than 4.9 V, the PCM determines that the MAF sensor circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • 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 • PCM connector or terminals malfunction • Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 2V • MAF sensor power supply circuit and signal circuit are shorted to each other • Open circuit in wiring harness between MAF/IAT sensor terminal B and PCM terminal 2U • MAF sensor malfunction • 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.
1		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.
2		No	Go to the next step.
3	INSPECT MAF/IAT SENSOR CONNECTOR CONDITION • Turn the ignition switch 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 9.
3		No	Go to the next step.
4	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 9.
4		No	Go to the next step.
5	INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • MAF/IAT sensor and PCM connectors are disconnected. • Turn the ignition switch to the ON position (engine off). • Measure the voltage at the MAF/IAT sensor terminal C (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
5		No	Go to the next step.
6	INSPECT MAF SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER • MAF/IAT sensor and PCM connectors are disconnected. • Turn the ignition switch off. • Inspect for continuity between MAF/IAT sensor terminals A and C (wiring harness-side). • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to each other, then go to Step 9.
6		No	Go to the next step.
7	INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • MAF/IAT sensor and PCM connectors are disconnected. • Inspect for continuity between MAF/IAT sensor terminal B (wiring harness-side) and PCM terminal 2U (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 9.
8	INSPECT MAF SENSOR • Reconnect all disconnected connectors. • Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZR 1.3, MZR 1.5].) • Is there any malfunction?	Yes	Replace the MAF/IAT sensor, then go to the next step. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 1.3, MZR 1.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR 1.3, MZR 1.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR 1.3, MZR 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 1.3, MZR 1.5].)
10		No	DTC troubleshooting completed.