Check The O2 Sensor Heater Control Circuit For Short - Chery Tiggo 2009 Service Manual

4.
DETECT MALFUNCTIONING PART
• Check the following:
With EOBD (1.6L and 1.8L)
− Front fuse and relay box H2, H5, F3, A1, A13, G5
− Fuse 25, fuse 12, fuse 27, fuse 24
Without EOBD (1.6L)
− Front fuse and relay box H2, H5, H3, F3, A1, G2, G5
− Fuse 23, fuse 12, fuse 27, fuse 22, fuse 25
Without EOBD (1.8L)
− Front fuse and relay box H2, H3, H5, F3, A1, A13, G5
− Fuse 22, fuse 25, fuse 12, fuse 27, fuse 24
• Check the harness for an open or a short between the O
Is the check result normal?
Yes >>
Go to the next step.
No >>
Repair or replace malfunctioning parts as necessary.
5.
CHECK THE O SENSOR HEATER CONTROL CIRCUIT FOR SHORT
2
• Turn ignition switch off.
• Disconnect ECM connector.
• Check harness continuity between ECM terminal and O
• Continuity should exist.
• Check the control circuit of the sensor heater.
O SENSOR
2
Upstream O sensor heater (With
2
EOBD)
Upstream O sensor heater (Without
2
EOBD)
• Check harness short to power supply circuit.
Is the check result normal?
Yes >>
Go to the next step.
No >>
Repair or replace circuit for a short to power in harness or connectors.
Chery Automobile Co., Ltd.
DIAGNOSIS & TESTING
sensor and fuse.
2
sensor terminal.
2
ECM TERMINAL
48
1
O SENSOR TERMINAL
2
1
1
03–
03
55