DTC P0629:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9148700

DTC P0629:00

Fuel pump control module circuit high input

DETECTION CONDITION

•  The PCM detects over-current during the fuel pump control module control.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2) is not available.

•  Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Stops fuel pump control

POSSIBLE CAUSE

•  Fuel pump unit connector or terminals malfunction

•  Fuel pump unit malfunction

•  Fuel pump control module connector or terminals malfunction

•  Short to power supply in wiring harness between the following terminals: (fuel pump unit connector 4-pin type)

―  Fuel pump unit terminal A—Fuel pump control module terminal 2C

―  Fuel pump unit terminal B—Fuel pump control module terminal 2D

•  Short to power supply in wiring harness between the following terminals: (fuel pump unit connector 5-pin type)

―  Fuel pump unit terminal B—Fuel pump control module terminal 2C

―  Fuel pump unit terminal D—Fuel pump control module terminal 2D

•  Fuel pump control module malfunction

•  PCM malfunction

DTC P0629:00	Fuel pump control module circuit high input
DETECTION CONDITION	• The PCM detects over-current during the fuel pump control module control. Diagnostic support note • This is a continuous monitor (CCM). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2) is not available. • Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Stops fuel pump control
POSSIBLE CAUSE	• Fuel pump unit connector or terminals malfunction • Fuel pump unit malfunction • Fuel pump control module connector or terminals malfunction • Short to power supply in wiring harness between the following terminals: (fuel pump unit connector 4-pin type) ― Fuel pump unit terminal A—Fuel pump control module terminal 2C ― Fuel pump unit terminal B—Fuel pump control module terminal 2D • Short to power supply in wiring harness between the following terminals: (fuel pump unit connector 5-pin type) ― Fuel pump unit terminal B—Fuel pump control module terminal 2C ― Fuel pump unit terminal D—Fuel pump control module terminal 2D • Fuel pump control module malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	INSPECT FUEL PUMP UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the fuel pump unit 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 7.
2		No	Go to the next step.
3	INSPECT FUEL PUMP UNIT • Inspect the fuel pump unit. (See FUEL PUMP UNIT INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is there any malfunction?	Yes	Replace the fuel pump unit, then go to Step 7. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
3		No	Go to the next step.
4	INSPECT FUEL PUMP CONTROL MODULE CONNECTOR CONDITION • Disconnect the fuel pump control module 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 7.
4		No	Go to the next step.
5	INSPECT FUEL PUMP UNIT CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the fuel pump unit and fuel pump control module connectors are disconnected. • Switch the ignition ON (engine off). • Measure the voltage at the following terminals (wiring harness-side): (fuel pump unit connector 4-pin type) ― Fuel pump unit terminal A ― Fuel pump unit terminal B • Measure the voltage at the following terminals (wiring harness-side): (fuel pump unit connector 5-pin type) ― Fuel pump unit terminal B ― Fuel pump unit terminal D • Is the voltage 0 V?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: (fuel pump unit connector 4-pin type) • Fuel pump unit terminal A—Fuel pump control module terminal 2C • Fuel pump unit terminal B—Fuel pump control module terminal 2D Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: (fuel pump unit connector 5-pin type) • Fuel pump unit terminal B—Fuel pump control module terminal 2C • Fuel pump unit terminal D—Fuel pump control module terminal 2D 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 power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 7.
6	INSPECT FUEL PUMP CONTROL MODULE • Inspect the fuel pump control module. (See FUEL PUMP CONTROL MODULE INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is there any malfunction?	Yes	Replace the fuel pump control module, then go to the next step. (See FUEL PUMP CONTROL MODULE REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
6		No	Go to the next step.
7	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
8		No	DTC troubleshooting completed.