Chery A11 2003 - Page 284

Maintenance Manual for Chery·Windcloud Marelli EFI System
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “OFF”.
Go to next step
Yes Go to Step 4
2
Unplug air conditioner compressor relay, turn
ignition switch to “ON”, check voltages between
Pin 30, 85 of relay and cathode of power supply to
see if they are around 12V.
No Go to next step
Yes
Repair or
replace wire
harness
3
Check power supply terminal circuit of relay to see
if open circuit or short circuit to ground occurs.
No Go to Step 2
Yes Replace relay
4
Check the voltage between Pin 86 of relay (control
terminal of air conditioner compressor relay) and
cathode of power supply to see if it is around 3.7V.
No Go to next step
Yes
Repair or
replace wire
harness
5
Check the connection between Pin 86 of relay
(control terminal of air conditioner compressor
relay) and Pin 41 of ECU to see if open circuit
occurs.
No
Diagnosis
Instruction
Failure: too low control circuit voltage of air conditioner compressor relay
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “OFF”.
Go to next step
Yes Go to Step 4
2
Unplug air conditioner compressor relay, turn
ignition switch to “ON”, check voltages between
Pin 30, 85 of relay (power supply terminals of
relay) and cathode of power supply to see if they are
around 12V.
No Go to next step
Yes
Repair or
replace wire
harness
3
Check power supply terminal circuit of relay to see
if open circuit or short circuit to ground occurs.
No Go to Step 2
Yes Replace relay
4
Check the voltage between Pin 86 of relay (control
terminal of air conditioner compressor relay) and
cathode of power supply to see if it is around 3.7V.
No Go to next step
Yes
Repair or
replace wire
harness
5
Check the connection between Pin 86 of relay
(control terminal of air conditioner compressor
relay) and Pin 41 of ECU to see if short circuit to
ground occurs.
No
Diagnosis
Instruction
33