Nissan Altima 2007-2012 Service Manual: Engine speed signal circuit
Description
• ECM sends engine speed signal to power steering control unit.
Diagnosis Procedure
1.PERFORM ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis.
Is any error system detected? YES >> Check the error system.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT
1. Turn the ignition switch OFF.
2. Disconnect ECM harness connector E10.
3. Disconnect power steering control unit harness connector.
4. Check continuity between ECM harness connector E10 (A) terminal 94 and power steering control unit harness connector M59 (B) terminal 10.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK ENGINE SPEED SIGNAL (ECM SIDE)
1. Turn the ignition switch OFF.
2. Connect ECM harness connector.
3. Check signal between ECM harness connector E10 terminal 94 and ground with oscilloscope.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 4.
NO >> Replace ECM. Refer to EC-34, "Component Parts Location" (QR25DE for California), EC-570, "Component Parts Location" (QR25DE except for California), EC-1058, "Component Parts Location" (VQ35DE).
4.CHECK ENGINE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)
1. Turn the ignition switch OFF.
2. Connect power steering control unit harness connector.
3. Check signal between power steering control unit harness connector M59 terminal 10 and ground with oscilloscope.
Also check harness for short to ground and short to power.
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace power steering control unit.
5.CHECK TERMINALS AND HARNESS CONNECTORS
• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check ECM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal? YES >> Inspection End
NO >> Repair or replace damaged parts.
Power steering solenoid valve
Description
• Power steering solenoid valve controls the power steering oil pressure in
the gear housing assembly.
Diagnosis Procedure
1.CHECK POWER STEERING SOLENOID VALVE SIGNAL
1. Start e ...
Vehicle speed signal circuit
Description
• Combination meter sends vehicle speed signal to power steering control
unit.
Diagnosis Procedure
1.PERFORM COMBINATION METER SELF-DIAGNOSIS
Perform combination meter self-diagno ...
Other materials:
C1716 - C1719 Transmitter pressure malfunction
Description
Air pressure data from one or more transmitters is out of range.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and ...
B2607 steering lock relay
Description
BCM requests to IPDM E/R to supply power to electronic steering column lock.
IPDM E/R sends status of
steering lock unit back to BCM.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2607 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000. Refer to
...
B2606 steering lock relay
Description
The steering lock relay ON signal is transmitted to IPDM E/R by BCM via CAN
communication.
IPDM E/R turns the steering lock relay ON and transmits the release of the
steering to BCM.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2606 is displayed with DTC U1000, first per ...