Chery A1 2009 Service Manual page 152

4.
DETECT MALFUNCTIONING PART
• Check the following for a possible malfunction:
− Fuse EF5, fuse EF7
− Main relay
− Front fuse and relay box A-040
− Harness for an open or short between O
• Repair or replace any malfunctioning part(s).
• With X-431, select view DTC.
Is DTC P0031 or P0032 still present?
Yes >>
Go to the next step.
No >>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
5.
CHECK THE O SENSOR HEATER CONTROL CIRCUIT FOR AN OPEN OR SHORT
2
• Turn ignition switch off.
• Disconnect the ECM connector.
• Check continuity between ECM terminal and O
COMPONENT
Upstream Oxygen Sensor
• Continuity should exist.
• Check harness for a short to ground or short to power.
Is the check result normal?
Yes >>
Go to the next step.
No >>
Repair or replace the circuit for an open, short to ground or short to power in harness or connectors.
6.
CHECK THE O SENSOR HEATER
2
• Check resistance between the following O
TERMINAL NO.
1 & 2 (including wire
and connector)
Chery Automobile Co., Ltd.
DIAGNOSIS & TESTING
2
2
O SENSOR HEATER CONTROL CIRCUIT
2
ECM
sensor terminals, component side:
2
O SENSOR HEATER RESISTANCE
2
RESISTANCE
Approximately
2.5 - 4.9
sensor and fuse
sensor terminal.
TERMINAL
48
1
03–
03
45