Chery A series. Manual — part 35

Diagnostic trouble code: P0132 “Overvoltage of circuit for upstream oxygen
sensor”

(Note: the following diagnostic procedures are applicable only under the
circumstances that the trouble code of P0135 does not appear simultaneously, in case
that such trouble code appears at the same time overhaul shall be carried out based on
the following procedures after dealing with the malfunction of P0135 firstly.)

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.

Proceed to next

step.

Yes

Refer to diagnosis

help.

2

Start up the engine, run at idle speed until
the temperature of coolant reaches the
normal value. Observe the value of
“Oxygen sensor voltage” on the
diagnostic tester to verify that the
indicated value is changed quickly within
the range of 100mV – 900mV.

No

Proceed to next

step.

Yes

Repair and replace

the wiring harness.

3

Verify that the circuits between 36# and
18# pins of ECU and A# (corresponding
to grey connecting wire of the oxygen
sensor) and B# (corresponding to black
connecting wire of the oxygen sensor)
pins of the sensor connector are short to
power supply.

No

Refer to diagnosis

help.

G-29

Diagnostic trouble code: P0134 “Signal malfunction of upstream oxygen sensor”

(Note: The following diagnostic procedures are applicable only under the
circumstances that the trouble code of P0135 does not appear simultaneously, in case
that such trouble code appears at the same time, overhaul shall be carried out based on
the following procedures after dealing with the malfunction of P0135 firstly.)

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.

Proceed to next

step.

Yes

Refer to diagnosis

help.

2

Start up the engine, run at idle speed until
the temperature of coolant reaches the
normal value. Observe the value of
“Oxygen sensor voltage” on the diagnostic
tester to verify that the indicated value is
changed quickly within the range of
100mV – 900mV.

No

Proceed to next

step.

Yes

Repair and replace

the wiring

harness.

3

Verify that the circuits between 36# and
18# pins of ECU and A# (corresponding to
the grey connecting wire of oxygen sensor)
and B# (corresponding to the black
connecting wire of oxygen sensor) pins of
the sensor connector are open.

No

Refer to diagnosis

help.

G-30

Diagnostic trouble code: P0135 “Malfunction in heating circuit of upstream
oxygen sensor”

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.

Proceed to next

step.

Yes

Proceed to next

step.

2

Disconnect the connector of the oxygen
sensor on the wiring harness and inspect
with multimeter to verify that the voltage
between C# (corresponding to the white
connecting wire of the oxygen sensor)
and D# (corresponding to the white
connecting wire of the oxygen sensor)
pins of this connector is about 12V.

No

Proceed to Step4

Yes

Proceed to next

step.

3

Inspect with multimeter to verify that the
resistance between C# (white) and D#
(white) pins of the oxygen sensor is
within 1~6Ω under 20 .

℃

No

Replace the sensor.

Yes

Replace the fuse.

4

Verify that the 8A fuse in heating circuit
of the oxygen sensor is burn out.

No

Proceed to next

step.

Yes

Repair and replace

the wiring harness.

5

Verify that the circuits between 1# pin of
ECU, 87# pin of the main relay and C#
(corresponding to white connecting wire
of the oxygen sensor) and D#
(corresponding to white connecting wire
of the oxygen sensor) are open or short to
ground or power supply.

No

Refer to diagnosis

help.

G-31

Diagnostic trouble code: P0171 “Self adapting of closed loop control for air fuel
ratio exceeding the upper limit”

(Note: the following diagnostic procedures are applicable only under the
circumstances that the trouble codes of intake air pressure sensor, carbon canister
control valve, oxygen sensor and so on do not appear simultaneously, in case that such
trouble codes appear at same time, overhaul shall be carried out based on the
following procedures after dealing with other malfunctions firstly.)

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.

Proceed to next

step.

Yes

Proceed to next

step.

2

Start up the engine, run at idle speed until
the temperature of coolant reaches the
normal value.
Under the full load working condition,
observe the value of “Oxygen sensor
voltage” on the diagnostic tester to verify
that the indicated value is maintained at
100 mV without significant change for
long time under certain working
conditions.

No

Refer to diagnosis

help.

Yes

Proceed to next

step.

3

Connect the fuel pressure gauge to the
feeding pipe of fuel supply system to
observe whether the fuel pressure is
maintained at 350kPa under full load
working condition.

No

Check and repair

the fuel system.

Yes

Repair and replace

the wiring harness.

4

Verify that the circuits between 36# and
18# pins of ECU and A# (corresponding to
the grey connecting wire of oxygen sensor)
and B# (corresponding to the black
connecting wire of oxygen sensor) pins of
the sensor connector are short to ground.

No

Proceed to next

step.

5

A. Verify that there is quite serious leakage
in the air intake system;
B. Verify that there is blockage in the fuel
injector;
C. Verify that the clearance of spark plug is
excessive large;
D. Verify that the resistance of distributor
circuit is excessive large;
E. Verify that the valve clearance is
excessive large; and etc.

Yes

Carry out service

based on the

diagnostic results.

G-32