DTC P0102:00 [SKYACTIV-D 1.5]

id0102q2700900

DTC P0102:00

MAF sensor circuit low input

DETECTION CONDITION

•  If the PCM detects that the MAF sensor voltage at the PCM terminal 2AC is 0.07 V or less for 5 s with the following condition met, the PCM determines that the MAF sensor circuit voltage is low.

MONITORING CONDITIONS

―  Battery voltage: 8—20 V

―  0.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  PCM restricts engine torque.

•  Inhibits the auto DPF regeneration control.

•  Inhibits the compulsory DPF regeneration control.

•  Inhibits the EGR control.

•  Inhibits engine-stop by operating the i-stop function.

POSSIBLE CAUSE

•  MAF sensor/IAT sensor No.1 connector or terminals malfunction

•  Short to ground or open circuit in MAF sensor power supply circuit

―  Short to ground in wiring harness between ENGINE1 15 A fuse and MAF sensor/IAT sensor No.1 terminal E

―  ENGINE1 15 A fuse malfunction

―  Open circuit in wiring harness between main relay terminal D and MAF sensor/IAT sensor No.1 terminal E

•  Short to ground in wiring harness between the following terminals:

―  MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI

―  MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC

•  PCM connector or terminals malfunction

•  MAF sensor signal circuit and ground circuit are shorted to each other

•  Open circuit in wiring harness between the following terminals:

―  MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI

―  MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC

•  MAF sensor malfunction

•  PCM malfunction

DTC P0102:00	MAF sensor circuit low input
DETECTION CONDITION	• If the PCM detects that the MAF sensor voltage at the PCM terminal 2AC is 0.07 V or less for 5 s with the following condition met, the PCM determines that the MAF sensor circuit voltage is low. MONITORING CONDITIONS ― Battery voltage: 8—20 V ― 0.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• PCM restricts engine torque. • Inhibits the auto DPF regeneration control. • Inhibits the compulsory DPF regeneration control. • Inhibits the EGR control. • Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• MAF sensor/IAT sensor No.1 connector or terminals malfunction • Short to ground or open circuit in MAF sensor power supply circuit ― Short to ground in wiring harness between ENGINE1 15 A fuse and MAF sensor/IAT sensor No.1 terminal E ― ENGINE1 15 A fuse malfunction ― Open circuit in wiring harness between main relay terminal D and MAF sensor/IAT sensor No.1 terminal E • Short to ground in wiring harness between the following terminals: ― MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI ― MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC • PCM connector or terminals malfunction • MAF sensor signal circuit and ground circuit are shorted to each other • Open circuit in wiring harness between the following terminals: ― MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI ― MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC • MAF sensor malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	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 SENSOR/IAT SENSOR NO.1 CONNECTOR CONDITION • Switch the ignition off. • Disconnect the MAF sensor/IAT sensor No.1 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 10.
3		No	Go to the next step.
4	INSPECT MAF SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Verify that the MAF sensor/IAT sensor No.1 connector is disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the MAF sensor/IAT sensor No.1 terminal E (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
4		No	Inspect the ENGINE1 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE1 15 A fuse and MAF sensor/IAT sensor No.1 terminal E. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal D and MAF sensor/IAT sensor No.1 terminal E. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 10.
5	INSPECT MAF SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the MAF sensor/IAT sensor No.1 connector is disconnected. • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― MAF sensor/IAT sensor No.1 terminal D ― MAF sensor/IAT sensor No.1 terminal C • Is there continuity?	Yes	Disconnect the PCM connector and inspect the wiring harness for short to ground. • If the short to ground circuit could be detected in the wiring harness: ― Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI • MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • If the short to ground circuit could not be detected in the wiring harness: ― Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to Step 10.
5		No	Go to the next step.
6	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 10.
6		No	Go to the next step.
7	INSPECT MAF SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER • Verify that the MAF sensor/IAT sensor No.1 and PCM connectors are disconnected. • Inspect for continuity between MAF sensor/IAT sensor No.1 terminals C and B (wiring harness-side). • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC • MAF sensor/IAT sensor No.1 terminal B—PCM terminal 2V If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to each other. Go to Step 10.
7		No	Go to the next step.
8	INSPECT MAF SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the MAF sensor/IAT sensor No.1 and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI ― MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC • Is there continuity?	Yes	Go to the next step.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • MAF sensor/IAT sensor No.1 terminal D—PCM terminal 2AI • MAF sensor/IAT sensor No.1 terminal C—PCM terminal 2AC If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 10.
9	INSPECT MAF SENSOR • Reconnect all disconnected connectors. • Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the MAF sensor/IAT sensor No.1, then go to the next step. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
9		No	Go to the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 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 [SKYACTIV-D 1.5].) Go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
11		No	DTC troubleshooting completed.