Infiniti I35 (A33). Manual — part 247
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4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F58, F211 (bank 1)
I
Harness connectors E15, F18
I
Harness for open or short between ECM and camshaft position sensor (PHASE) or harness connector F58
I
Harness for open or short between ECM relay and camshaft position sensor (PHASE) or harness connector F58
©
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between harness connector F58 terminal 3 and ground (bank 1). Refer to Wiring Diagram.
3. Check CMP sensor (PHASE) harness connector terminal 1 and ground (bank 2). Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F58, F211 (bank 1)
I
Harness for open between camshaft position sensor (PHASE) or harness connector F58 and ground
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 65 and harness connector F58 terminal 1.
3. Check harness continuity between ECM terminal 85 and CMP sensor (PHASE) harness connector terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK (DTC P0340)
©
GO TO 9.
OK (DTC P0345)
©
GO TO 10.
NG
©
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F58, F211 (bank 1)
I
Harness for open or short between ECM and camshaft position sensor (PHASE) or harness connector F58
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0340, P0345 CMP SENSOR (PHASE)
Diagnostic Procedure (Cont’d)
EC-329
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9
CHECK CMP SENSOR (PHASE) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1. Disconnect CMP sensor (PHASE) harness connector.
2. Check harness continuity between CMP sensor (PHASE) terminals and harness connector F211 terminals as follows.
MTBL1845
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 10.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
10
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to “Component Inspection”, EC-331.
OK or NG
OK
©
GO TO 11.
NG
©
Replace camshaft position sensor (PHASE).
11
CHECK CAMSHAFT (INTAKE)
Visually check for chipped signal plate at camshaft rear.
SEC905C
OK or NG
OK
©
GO TO 12.
NG
©
Replace camshaft.
12
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
DTC P0340, P0345 CMP SENSOR (PHASE)
Diagnostic Procedure (Cont’d)
EC-330
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PBIB0563E
Component Inspection
NHEC1416
CAMSHAFT POSITION SENSOR (PHASE)
NHEC1416S01
1.
Loosen the fixing bolt of the sensor.
2.
Disconnect camshaft position sensor (PHASE) harness con-
nector.
3.
Remove the sensor.
4.
Visually check the sensor for chipping.
PBIB0564E
5.
Check resistance as shown inthe figure.
Terminal No. (Polarity)
Resistance
Ω
[at 25°C (77°F)]
1 (+) - 2 (−)
Except 0 or
∞
1 (+) - 3 (−)
2 (+) - 3 (−)
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0340, P0345 CMP SENSOR (PHASE)
Component Inspection
EC-331
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SEF484YF
On Board Diagnosis Logic
NHEC1443
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 and 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor
2 switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2
approaches a specified limit value, the three way catalyst (mani-
fold) malfunction is diagnosed.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0420
0420
(Bank 1)
P0430
0430
(Bank 2)
Catalyst system effi-
ciency below thresh-
old
Three way catalyst (manifold) does not operate
properly, three way catalyst (manifold) does not
have enough oxygen storage capacity.
I
Three way catalyst (Manifold)
I
Exhaust tube
I
Intake air leaks
I
Injectors
I
Injector leaks
I
Spark plug
I
Improper ignition timing
SEC138D
SEC139D
SEF560X
DTC Confirmation Procedure
NHEC0952
NOTE:
If DTC Confirmation Procedure has been previously conducted,
always turn ignition switch OFF and wait at least 10 seconds before
conducting the next test.
WITH CONSULT-II
NHEC0952S01
TESTING CONDITION:
I
Open engine hood before conducting the following proce-
dure.
I
Do not hold engine speed for more than the specified
minutes below.
1)
Start engine and warm it up to the normal operating tempera-
ture.
2)
Turn ignition switch OFF and wait at least 10 seconds.
3)
Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least 1 minute under no load.
4)
Let engine idle for 1 minute.
5)
Open engine hood.
6)
Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
7)
Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely. If
“INCMP” of “CATALYST” changed to “COMPLT”, go to step 10.
8)
Wait 5 seconds at idle.
9)
Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
approximately 5 minutes). If not “CMPLT”, perform the follow-
ing.
a)
Turn ignition switch OFF and leave the vehicle in a cool place
(soak the vehicle).
b)
Turn ignition switch ON and select “COOLANTEMP/S” in
“DATA MONITOR” mode with CONSULT-II.
c)
Start
engine
and
warm
it
up
while
monitoring
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
On Board Diagnosis Logic
EC-332
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