Great Wall GW491QE, Руководство по обслуживанию

Страница: 75 / 222

EF.1-56
Fault code
：
P0132 the signal voltage in the loop of upstream sensor is too high
”
Note: The diagnosis flow process below is applicable to cases excluding that P0135 is not produced simultaneously; if P0135 is
produced simultaneously, you need to settle the failure with P0135 first before performing a check and repair as per the flow process
below.
S.N. Operation steps
Check
result
Follow-up steps
1 Connect with the diagnosis instrument, and place the ignition switch to the ON
”
position. Next step.
Yes Diagnosis help.
2
Start the engine and have it running at idle-speed until the cooling-fluid temperature reaches its
normal value. Observe the change of value at the item oxygen sensor voltage
”
on diagnosis
instrument, and whether the displayed value makes a rapid change within 100mV~900mV.
No
Next step.
Yes
Repair or change the wiring
harness.
3
Check whether respective loops between Pin 36 &18 of ECU and the connection Pin A
(corresponding to the grey connection line of oxygen sensor) and B (corresponding to the
black connection line of oxygen sensor) of sensor are broken loops.
No
Change the sensor.
Yes
Check and repair it based on
diagnosis.
4
A
、
Whether the exhaust system is leaking air or has been blocked;
B
、
Whether the oil injector has any leakage;
C
、
Whether the fuel pressure is too big;
D
、
Whether the clearance of air valve is too small
So on and so forth.
No
Change the sensor.
Fault code
：
P0134 Failure with the signal of upstream sensor
”
Note: The diagnosis flow process below is applicable to cases excluding that P0135 is not produced simultaneously; if P0135 is
produced simultaneously, you need to settle the failure with P0135 first before performing a check and repair as per the flow
process below.
S.N. Operation steps
Check
result
Follow-up steps
1 Connect with the diagnosis instrument, and place the ignition switch to the ON
”
position. Yes Next step.
Yes Diagnosis help.
2
Start the engine and have it running at idle-speed until the cooling-fluid temperature reaches its
normal value. Observe the change of value at the item oxygen sensor voltage
”
on diagnosis
instrument, and whether the displayed value makes a rapid change within 100mV~900mV.
No Next step.
Yes
Repair or change the wiring
harness. 3
Check whether respective loops between Pin 36 &18 of ECU and the connection Pin A
(corresponding to the grey connection line of oxygen sensor) and B (corresponding to the
black connection line of oxygen sensor) of sensor are broken loops. No Change the sensor.
Fault code
：
P0135 Failure with heating loop of upstream oxygen sensor.
”
S.N. Operation steps
Check
result
Follow-up steps
1 Connect with the diagnosis instrument, and place the ignition switch to the ON
”
position. Next step.
Yes Next step.
2
Pull out the plug of oxygen sensor from wiring harness, and a multimeter may be used to check
whether the voltage between Pin C corresponding to the white connection line of oxygen
sensor and Pin D corresponding to the white connection line of oxygen sensor of the plug
is about 12V.
No Continue to proceed until step 4.
Yes Next step.
3
A multimeter may be used to check whether the resistance between Pin C (white) and Pin
D(white) of oxygen sensor is within 1-6
Ω
when at 20
℃
. No Change the sensor.
Yes Change the fuse
4 Check whether the 8A fuse in the heating loop of oxygen sensor has been blown and broken.
No Next step.
Yes
Repair or change the wiring
harness.
5
Check whether respective loops between Pin 1 of ECU / Pin 87 of main relay and the
connection Pin C (corresponding to the while connection line of oxygen sensor) and Pin D
(corresponding to the while connection line of oxygen sensor) of sensor are broken loops, or
short circuit to ground or power supply.
No Diagnosis help.
M7.9.7 system service &diagnosis flow process based on fault code
ProCarManuals.com