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
2
sensor and fuse
• 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
2
SENSOR HEATER CONTROL CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect the ECM connector.
• Check continuity between ECM terminal and O
2
sensor terminal.
O
2
SENSOR HEATER CONTROL CIRCUIT
COMPONENT TERMINAL
ECM 48
Upstream Oxygen Sensor 1
• 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
2
SENSOR HEATER
• Check resistance between the following O
2
sensor terminals, component side:
O
2
SENSOR HEATER RESISTANCE
TERMINAL NO. RESISTANCE
1 & 2 (including wire
and connector)
Approximately
2.5 - 4.9 V
DIAGNOSIS & TESTING
03
03–45
Chery Automobile Co., Ltd.
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