Nissan Maxima Service and Repair Manual: Engine speed signal circuit
Description
ECM sends engine speed signal to power steering control unit.
Diagnosis Procedure
1.PERFORM ECM SELF-DIAGNOSIS
With CONSULT
Perform ECM self-diagnosis.
2.CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT FOR OPEN

- Turn the ignition switch OFF.
- Disconnect ECM connector E10.
- Disconnect power steering control unit connector.
- Check continuity between ECM connector E10 (A) terminal 94
and
power steering control unit connector M59 (B) terminal 10.

3.CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT FOR SHORT


- Check continuity between ECM connector E10 terminal 94 and
ground.
- Turn ignition switch ON.
- Check voltage between ECM connector E10 terminal 94 and
ground.


4.CHECK ENGINE SPEED SIGNAL (ECM SIDE)

- Turn the ignition switch OFF.
- Connect ECM connector E10.
- Start the engine.
- Check signal between ECM connector E10 terminal 94 and
ground
with oscilloscope.

5.CHECK ENGINE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)

- Turn the ignition switch OFF.
- Connect power steering control unit harness connector.
- Start the engine.
- Check signal between power steering control unit harness connector
M59 terminal 10 and ground with oscilloscope

6.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.
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
Start eng ...
Description
Combination meter sends vehicle speed signal to power steering control unit.
Diagnosis Procedure
1.PERFORM COMBINATION METER SELF-DIAGNOSIS
Perform combination meter self-diagnosis.
2 ...
Other materials:
Wiring diagram
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Wiring Diagram
...
Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT
PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk
or severity of injury to the driver and front passenger for ...
Washer level switch signal circuit
Description
Transmits the washer fluid level switch signal to the
combination meter.
Component Function Check
1.COMBINATION METER INPUT SIGNAL
Select "METER/M&A" on CONSULT.
Monitor "WASHER W/L" of "DATA MONITOR" under
the following conditions.
>> I ...