Infiniti Q45 (FY33). Manual - part 151

SEF392X

Procedure for malfunction A

1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 6 seconds.
4) If 1st trip DTC is detected, go to “DIAGNOSTIC

PROCEDURE”, EC-136.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Follow the procedure “With CONSULT-II” above.

SEF261Y

Procedure for malfunction B

1) Start engine and warm it up to normal operating tem-

perature.

2) Turn ignition switch “OFF” and wait at least 5 seconds.
3) Turn ignition switch “ON” and select “DATA MONITOR”

mode with CONSULT-II.

4) Start engine and let it idle.
5) Wait at least 15 seconds.
6) If 1st trip DTC is detected, go to “DIAGNOSTIC

PROCEDURE”, EC-138.

Follow the procedure “With CONSULT-II” above.

SEF262Y

Procedure for malfunction C

CAUTION:

Always drive vehicle at a safe speed.

1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.

The voltage of “ABSOL PRES/SE” should be more than
1.74 [V].
If the check result is NG, go to “DIAGNOSTIC
PROCEDURE”, EC-136. If the check result is OK, go to
following step.

3) Start engine (TCS switch “OFF”) and warm it up to nor-

mal operating temperature.

4) Turn ignition switch “OFF” and wait at least 5 seconds.
5) Start engine and let it idle for at least 13 seconds.
6) Select “DATA MONITOR” mode with CONSULT-II.
7) Drive the vehicle at least 3 consecutive seconds under

the following conditions,
B/FUEL SCHDL: More than 5.6 ms
CMPS-RPM (POS): 3,000 - 4,800 rpm
Selector lever: Suitable position
Driving location: Driving vehicle uphill (Increased

engine load) will help maintain
the driving conditions required
for this test.

IDX

TROUBLE DIAGNOSIS FOR DTC P0105

Absolute Pressure Sensor (Cont’d)

EC-133

8) If 1st trip DTC is detected, go to “DIAGNOSTIC

PROCEDURE”, EC-138.

SEF518R

SEF636U

OVERALL FUNCTION CHECK
Use this procedure to check the overall function of the absolute
pressure sensor circuit. During this check, a 1st trip DTC might not
be confirmed.

1) Turn ignition switch “ON”.
2) Select “MAP” in “MODE 1” with GST.
3) Make sure that the pressure of “MAP” is more than 46

kPa (0.47 kg/cm

, 6.7 psi).

4) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-138.

1) Turn ignition switch “ON”.
2) Make sure that the voltage between ECM terminal

and engine ground is more than 1.74 [V].

3) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-138.

TROUBLE DIAGNOSIS FOR DTC P0105

Absolute Pressure Sensor (Cont’d)

EC-134

TEC041M

IDX

TROUBLE DIAGNOSIS FOR DTC P0105

Absolute Pressure Sensor (Cont’d)

EC-135

SEF383U

SEF377U

SEF095S

SEF096S

SEF384U

DIAGNOSTIC PROCEDURE

If the trouble is duplicated after “Procedure for malfunction A
or C”, perform “Procedure A” below. If the trouble is dupli-
cated after “Procedure for malfunction B”, perform “Proce-
dure B” on next page.

Procedure A

INSPECTION START

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground

screws.

CHECK POWER SUPPLY.
1. Turn ignition switch “OFF”.
2. Disconnect absolute pressure sensor

harness connector.

3. Check sensor connector for water.

Water should not exist.
If OK, go to step 4. If NG, repair or
replace harness connector.

4. Turn ignition switch “ON”.
5. Check voltage between terminal

and

engine ground with CONSULT-II or
tester.
Voltage: Approximately 5V

Check the following.

Harness for open or
short between ECM and
absolute pressure sensor

If NG, repair or replace
harness or connectors.

CHECK GROUND CIRCUIT.
1. Turn ignition switch “OFF”.
2. Check harness continuity between ter-

minal

and engine ground.

Continuity should exist.
If OK, check harness for short to power.

Check the following.

Harness connectors

F63

M49

Harness connectors

Joint connector-16

Harness for open or
short between ECM and
absolute pressure sensor

Harness for open or
short between TCM
(Transmission control
module) and absolute
pressure sensor

Harness for open or
short between absolute
pressure sensor and
TAC module

If NG, repair open circuit or
short to power in harness
or connectors.

CHECK INPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM

terminal

and terminal

Continuity should exist.
If OK, check harness for short to
ground and short to power.

Repair harness or connec-
tors.

(Go to next page.)

TROUBLE DIAGNOSIS FOR DTC P0105

Absolute Pressure Sensor (Cont’d)

EC-136

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