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![INFINITI M35 2007 Factory Service Manual EC-1184
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DTC P0550 PSP SENSOR
Revision: 2007 April2007 M35/M45
2. CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor (1) harness connector.
–Illustration shows the view from unde INFINITI M35 2007 Factory Service Manual EC-1184
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DTC P0550 PSP SENSOR
Revision: 2007 April2007 M35/M45
2. CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor (1) harness connector.
–Illustration shows the view from unde](/manual-img/42/57024/w960_57024-2712.png)
EC-1184
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DTC P0550 PSP SENSOR
Revision: 2007 April2007 M35/M45
2. CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor (1) harness connector.
–Illustration shows the view from under the vehicle.
2. Turn ignition switch ON.
3. Check voltage between PSP sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, E72
Harness connectors E11, F2
Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, E72
Harness connectors E11, F2
Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground short to power in harness or connectors.
PBIB2701E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
Page 2714 of 4647
![INFINITI M35 2007 Factory Service Manual DTC P0550 PSP SENSOR
EC-1185
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6. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM ter INFINITI M35 2007 Factory Service Manual DTC P0550 PSP SENSOR
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6. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM ter](/manual-img/42/57024/w960_57024-2713.png)
DTC P0550 PSP SENSOR
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6. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, E72
Harness connectors E11, F2
Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK PSP SENSOR
Refer to EC-1185, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace PSP sensor.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-857, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS005JN
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the
following conditions.
Removal and InstallationNBS005JO
POWER STEERING PRESSURE SENSOR
Refer to PS-39, "HYDRAULIC LINE" . Continuity should exist.
Condition Voltage
Steering wheel: Being turned. 0.5 - 4.5V
Steering wheel: Not being turned. 0.4 - 0.8V
MBIB0126E
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![INFINITI M35 2007 Factory Service Manual EC-1186
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
DTC P0603 ECM POWER SUPPLYPFP:23710
Component DescriptionNBS005JP
Battery voltage is supplied to the ECM even when the igni INFINITI M35 2007 Factory Service Manual EC-1186
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
DTC P0603 ECM POWER SUPPLYPFP:23710
Component DescriptionNBS005JP
Battery voltage is supplied to the ECM even when the igni](/manual-img/42/57024/w960_57024-2714.png)
EC-1186
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
DTC P0603 ECM POWER SUPPLYPFP:23710
Component DescriptionNBS005JP
Battery voltage is supplied to the ECM even when the ignition switch
is turned OFF for the ECM memory function of the DTC memory, the
air-fuel ratio feedback compensation value memory, the idle air vol-
ume learning value memory, etc.
On Board Diagnosis LogicNBS005JQ
DTC Confirmation ProcedureNBS005JR
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
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn
ON.
5. Repeat steps 3 and 4 for four times.
6. If 1st trip DTC is detected, go to EC-1188, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB1164E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0603
0603ECM power supply circuitECM back-up RAM system does not function
properly.
Harness or connectors
[ECM power supply (back-up) circuit is
open or shorted.]
ECM
SEF058Y
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DTC P0603 ECM POWER SUPPLY
EC-1187
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Wiring DiagramNBS005JS
TBWT1035E
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![INFINITI M35 2007 Factory Service Manual EC-1188
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t INFINITI M35 2007 Factory Service Manual EC-1188
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t](/manual-img/42/57024/w960_57024-2716.png)
EC-1188
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DTC P0603 ECM POWER SUPPLY
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureNBS005JT
1. CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check voltage between ECM terminal 121 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E108, M15
20A fuse
IPDM E/R harness connector E8
Harness for open or short between ECM and battery
>> Repair or replace harness or connectors.
3. CHECK INTERMITTENT INCIDENT
Refer to EC-857, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness or connectors.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
121 LPower supply for ECM
(Back-up)[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0026E
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![INFINITI M35 2007 Factory Service Manual DTC P0603 ECM POWER SUPPLY
EC-1189
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4. PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ON.
2. Select “S INFINITI M35 2007 Factory Service Manual DTC P0603 ECM POWER SUPPLY
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4. PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ON.
2. Select “S](/manual-img/42/57024/w960_57024-2717.png)
DTC P0603 ECM POWER SUPPLY
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4. PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4.Perform DTC Confirmation Procedure.
See EC-1186, "
DTC Confirmation Procedure" .
5. Is the 1st trip DTC P0603 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.Perform DTC Confirmation Procedure.
See EC-1186, "
DTC Confirmation Procedure" .
4. Is the 1st trip DTC P0603 displayed again?
Ye s o r N o
Ye s > > G O T O 5 .
No >>INSPECTION END
5. REPLACE ECM
1. Replace ECM.
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to
BL-248, "
ECM Re-Communicating Function" .
3. Perform EC-787, "
VIN Registration" .
4. Perform EC-788, "
Accelerator Pedal Released Position Learning" .
5. Perform EC-788, "
Throttle Valve Closed Position Learning" .
6. Perform EC-788, "
Idle Air Volume Learning" .
>>INSPECTION END
Page 2719 of 4647
![INFINITI M35 2007 Factory Service Manual EC-1190
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DTC P0605 ECM
Revision: 2007 April2007 M35/M45
DTC P0605 ECMPFP:23710
Component DescriptionNBS005JU
The ECM consists of a microcomputer and connectors for signal
input and output and INFINITI M35 2007 Factory Service Manual EC-1190
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DTC P0605 ECM
Revision: 2007 April2007 M35/M45
DTC P0605 ECMPFP:23710
Component DescriptionNBS005JU
The ECM consists of a microcomputer and connectors for signal
input and output and](/manual-img/42/57024/w960_57024-2718.png)
EC-1190
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DTC P0605 ECM
Revision: 2007 April2007 M35/M45
DTC P0605 ECMPFP:23710
Component DescriptionNBS005JU
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis LogicNBS005JV
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation ProcedureNBS005JW
Perform PROCEDURE FOR MALFUNCTION A first. If the 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
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.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If 1st trip DTC is detected, go to EC-1191, "
Diagnostic Proce-
dure" .
With GST
Follow the procedure “With CONSULT-II” above.
PBIB1164E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605
0605Engine control moduleA) ECM calculation function is malfunctioning.
ECM B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning.
Detected items Engine operation condition in fail-safe mode
Malfunction A
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx.
5 degrees) by the return spring.
ECM deactivates ASCD operation.
SEF058Y
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PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select INFINITI M35 2007 Factory Service Manual DTC P0605 ECM
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PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select](/manual-img/42/57024/w960_57024-2719.png)
DTC P0605 ECM
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PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
4. If 1st trip DTC is detected, go to EC-1191, "
Diagnostic Proce-
dure" .
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
4. Repeat step 3 for 32 times.
5. If 1st trip DTC is detected, go to EC-1191, "
Diagnostic Proce-
dure" .
With GST
Follow the procedure “With CONSULT-II” above.
Diagnostic ProcedureNBS005JX
1. INSPECTION START
With CONSULT-II
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4.Perform DTC Confirmation Procedure.
See EC-1190, "
DTC Confirmation Procedure" .
5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.Perform DTC Confirmation Procedure.
See EC-1190, "
DTC Confirmation Procedure" .
4. Is the 1st trip DTC P0605 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >>INSPECTION END
SEF058Y
SEF058Y