Chery A15 / 480 LHD model. Manual - part 86

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

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

Proceed to next

step.

Yes

Refer to diagnosis

help.

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.

Proceed to next

step.

Yes

Repair and replace

the wiring harness.

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.

Refer to diagnosis

help.

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

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

Proceed to next

step.

Yes

Refer to diagnosis

help.

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.

Proceed to next

step.

Yes

Repair and replace

the wiring

harness.

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.

Refer to diagnosis

help.

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

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

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

Proceed to next

step.

Yes

Proceed to next

step.

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.

Proceed to Step4

Yes

Proceed to next

step.

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

℃

Replace the sensor.

Yes

Replace the fuse.

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

Proceed to next

step.

Yes

Repair and replace

the wiring harness.

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

(corresponding to white connecting wire
of the oxygen sensor) are open or short to
ground or power supply.

Refer to diagnosis

help.

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

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

Proceed to next

step.

Yes

Proceed to next

step.

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.

Refer to diagnosis

help.

Yes

Proceed to next

step.

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.

Check and repair

the fuel system.

Yes

Repair and replace

the wiring harness.

Proceed to next

step.

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.

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