Chery A15 / 480 LHD model. Manual — part 93

Diagnostic trouble code: P0601 “Malfunction of non-programmed check code in
electronic control unit”

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

Clear the diagnostic trouble code and
reconfirm that this malfunction is a steady
state malfunction.

No

Normal operation

3

Replace ECU.

End

Diagnostic trouble code: P0602 “Malfunction of non-programmed diagnostic
trouble code in electronic control unit”

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

Clear the diagnostic trouble code and
reconfirm that this malfunction is a steady
state malfunction.

No

Normal operation

3

Replace ECU.

End

Diagnostic trouble code: P0645 “Malfunction in control circuit of A/C
compressor relay”

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

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

Proceed to next

step

Yes

Proceed to step 4

2

Pull out the A/C compressor relay, turn the
ignition switch to “ON” position and check
if the voltage between the power supply
terminal of relay (i.e. 30# and 85# pins of
the relay) and the negative grid of power
supply is about 12V.

No

Proceed to next

step

Yes

Repair or replace

the wiring

harness.

3

Check if the power supply circuit of relay is
open or short to ground.

No

Proceed to Step 2

Yes

Replace the relay.

4

Inspect with multimeter to check if the
voltage between the control terminal of A/C
compressor relay (i.e. 86# pin of the relay)
and the negative grid of power supply is
about 3.7V.

No

Proceed to next

step

Yes

Repair or replace

the wiring

harness.

5

Check if the circuit between the control
terminal of A/C compressor relay (i.e. 86#
pin of the relay) and 70# pin of ECU is
open.

No

Refer to

diagnosis help.

Diagnostic trouble code: P0646 “Undervoltage in control circuit of A/C
compressor relay”

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

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

Proceed to next step

Yes

Proceed to Step 4

2

Pull out the A/C compressor relay, turn
the ignition switch to “ON” position and
check if the voltage between the power
supply terminal of relay (i.e. 30# and 85#
pins of the relay) and the negative grid of
power supply is about 12V.

No

Proceed to next step

Yes

Repair or replace

the wiring harness.

3

Check if the power supply circuit of relay
is open or short to ground.

No

Proceed to Step 2

Yes

Replace the relay.

4

Inspect with multimeter to check if the
voltage between the control terminal of
A/C compressor relay (i.e. 86# pin of the
relay) and the negative grid of power
supply is about 3.7V.

No

Proceed to next step

Yes

Repair or replace

the wiring harness.

5

Check if the circuit between the control
terminal of A/C compressor relay (i.e. 86#
pin of the relay) and 70# pin of ECU is
short to ground.

No

Refer to diagnosis

help.

Diagnostic trouble code: P0647 “Overvoltage in control circuit of A/C
compressor relay”

Item

No.

Operation procedure

Inspection

results

Follow-up

procedure

1

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

Proceed to next step

Yes

Proceed to Step 4

2

Pull out the A/C relay, turn the ignition
switch to “ON” position and check if the
voltage between the power supply
terminal of relay (i.e. 30# and 85# pins of
the relay) and the negative grid of power
supply is about 12V.

No

Proceed to next

step.

Yes

Repair or replace

the wiring harness

3

Check if the power supply circuit of relay
is open or short to ground.

No

Proceed to Step 2

Yes

Replace the relay

4

Inspect with multimeter to check if the
voltage between the control terminal of
A/C compressor relay (i.e. 86# pin of the
relay) and the negative grid of power
supply is about 3.7V.

No

Proceed to next step

Yes

Repair or replace

the wiring harness

5

Check if the circuit between the control
terminal of A/C compressor relay (i.e.
86# pin of the relay) and 70# pin of ECU
is short to supply.

No

Refer to diagnosis

help