Chery A series. Instruction - page 42
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
G-57
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.
G-58
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.
G-59
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
G-60
