DTC P0103[L3 Turbo]

id0102b7803300

DTC P0103

MAF circuit high input

DETECTION CONDITION

•  The PCM monitors input voltage from the MAF sensor when the engine is running. If the input voltage is above 4.9 V, the PCM determines that the MAF circuit has a malfunction.

Diagnostic support note

•  This is a continuous monitor (CCM).

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

•  FREEZE FRAME DATA is available.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  MAF sensor malfunction

•  Connector or terminal malfunction

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

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

DTC P0103	MAF circuit high input
DETECTION CONDITION	• The PCM monitors input voltage from the MAF sensor when the engine is running. If the input voltage is above 4.9 V, the PCM determines that the MAF circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• MAF sensor malfunction • Connector or terminal malfunction • Short to power supply in the wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK • Open circuit in the wiring harness between MAF/IAT sensor terminal B and PCM terminal 1P

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME 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.
2		No	Go to the next step.
3	INSPECT MAF SENSOR CONNECTOR FOR POOR CONNECTION • 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 terminals, then go to Step 7.
3		No	Go to the next step.
4	INSPECT MAF SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn ignition switch to the ON position (Engine off). • Measure voltage between MAF/IAT sensor terminal C (harness-side) and body ground. • Is voltage 0 V?	Yes	Go to the next step.
4		No	Repair or replace the suspected wiring harness, then go to Step 7.
5	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair the terminal, then go to Step 7.
5		No	Go to the next step.
6	INSPECT MAF SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Remove the PCM with the PCM connector connected. • Inspect for continuity between MAF/IAT sensor terminal B (harness-side) and PCM terminal 1P. • Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the suspected wiring harness, then go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0103 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine and warm it up completely. • Is same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE[L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[L3 Turbo].)
8		No	Troubleshooting completed.