3.1.13-220
CS35 2013.04
3.1.13-220Electronic Control System - ME7
DTC P0627, P0629
1. DTC Description
2. Possible Sources
3. Diagnosis Procedures
Refer to: Fuel Pump Not Work Diagnosis (3.1.7 Fuel System, Symptom Diagnosis and
Testing).
Fault Code Description Definition
P0627
Fuel pump relay control circuit
open circuit
Working power of oil pump relay coil is supplied by
main relay controlled by ECM. ECM controls the
grounding of the oil pump relay ER04 of engine
compartment fuse and relay box C01 terminal 85
through the ECM wiring harness connector E01 ter-
minal 70 and the pump relay movement.
There is a drive circuit control relay coil equipped
within the ECM for grounding. Drive circuit provides
a feedback circuit to ECM, ECM determines the con-
trol circuit open, short circuit to ground or to voltage
through monitoring the feedback voltage.
P0629
Oil pump relay control circuit
voltage is too high
Fault
Code
Test Tactics
Setting Conditions (Control
Strategy)
Fault
P0627
Hardware circuit
inspect
Open circuit
• Relay
• Relay circuit
•ECM
P0629 Short circuit to power supply
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