Nissan Maxima Service and Repair Manual: System description
ENGINE CONTROL SYSTEM
System Diagram

System Description
ECM performs various controls such as fuel injection control and ignition
timing control.
Component Parts Location

- Intake valve timing control solenoid
valve (bank 1)
- Electronic controlled engine mount
control solenoid valve
- Exhaust valve timing control magnet
retarder (bank 2)
- Intake valve timing control solenoid
valve (bank 2)
- Knock sensor (bank 1 and 2)
- Fuel injector (bank 2)
- Ignition coil (with power transistor) and
spark plug (bank 2)
- Exhaust valve timing control position
sensor (bank 2)
- Crankshaft position sensor (POS)
- Engine coolant temperature sensor 11. Camshaft position sensor
(PHASE)
(bank 2)
- Transmission range switch
- Refrigerant pressure sensor
- ECM
- Battery current sensor
- Condenser-2
- EVAP canister purge volume control
solenoid valve
- Mass air flow sensor (with intake air
temperature sensor)
- Camshaft position sensor (PHASE)
(bank 1)
- EVAP service port
- Power valve actuator 2
- Electric throttle control actuator
- Exhaust valve timing control position
sensor (bank 1)
- Ignition coil (with power transistor) and
spark plug (bank 1)
- Fuel injector (bank 1)
- VIAS control solenoid valve 1 and 2
- Power valve actuator 1
- Exhaust valve timing control magnet
retarder (bank 1)
- Power steering pressure sensor

- Mas air flow sensor (with intake air
temperature sensor)
- Air cleaner case
- Engine coolant temperature sensor
(view with engine cover removed)
- EVAP canister purge volume control
solenoid valve (view with engine cover
removed)
- Power valve actuator 1 (view with engine
cover removed)
- VIAS control solenoid valve 1
- VIAS control solenoid valve 2
- Power valve actuator 2
- Power steering pressure sensor
- Tie rod (RH)
- Camshaft position sensor (PHASE)
(bank 1) (view with air cleaner case removed)
- Exhaust valve timing control position
sensor (bank 1)
- Camshaft position sensor (PHASE)
(bank 2) (view with air cleaner case removed)
- Exhaust valve timing control position
sensor (bank 2)
- . Engine oil temperature sensor
: Vehicle front

- A/F sensor 1 (bank 1) (view with engine
removed)
- A/F sensor 1 (bank 2)
- HO2S2 (bank 1) harness connector
(view with engine removed)
- HO2S2 (bank 2) harness connector
- Front engine mount
- Crankshaft position sensor (POS)
: Vehicle front

- Electronic controlled engine mount
control solenoid valve (view with engine
cover removed)
- EVAP control system pressure sensor
(view with rear suspension member removed)
- EVAP canister vent control valve
- EVAP canister
- Fuel injector harness connector (view
with intake manifold collector removed)
- Exhaust valve timing control magnet
retarder (bank 1) (view with engine removed)
- Intake valve timing control solenoid
valve (bank 1)
- Intake valve timing control solenoid
valve (bank 2)
- Exhaust valve timing control magnet
retarder (bank 2)
: Vehicle front

- Knock sensor (bank 2) (view with intake
manifold removed)
- Knock sensor (bank 1)
- Transmission range switch
(view with CVT removed)
- Battery
- IPDM E/R
- ECM
- Refrigerant pressure sensor (view
with front grille removed)
- Accelerator pedal position sensor
: Vehicle front

- Stop lamp switch
- ASCD brake switch
- ASCD steering switch
Component Description
Component Reference
- A/F sensor 1 EC-218, "Description"
- A/F sensor 1 heater EC-170, "Description"
- Accelerator pedal position sensor EC-467, "Description"
- ASCD brake switch EC-429, "Description"
- ASCD steering switch EC-426, "Description"
- Battery current sensor EC-414, "Description"
- Camshaft position sensor (PHASE) EC-300, "Description"
- Crankshaft position sensor (POS) EC-296, "Description"
- Cooling fan motor EC-486, "Description"
- Electric throttle control actuator EC-465, "Description"
- Electronic controlled engine mount EC-493, "Description"
- Engine coolant temperature sensor EC-201, "Description"
- Engine oil temperature sensor EC-277, "Description"
- EVAP canister purge volume control solenoid valve EC-323, "Description"
- EVAP canister vent control valve EC-333, "Description"
- EVAP control system pressure sensor EC-343, "Description"
- Fuel injector EC-496, "Description"
- Fuel level sensor EC-372, "Description"
- Fuel pump EC-499, "Description"
- Fuel tank temperature sensor EC-269, "Description"
- Heated oxygen sensor 2 EC-230, "Description"
- Heated oxygen sensor 2 heater EC-173, "Description"
- Ignition coil with power transistor EC-502, "Description"
- Intake air temperature sensor EC-198, "Description"
- Intake valve timing control solenoid valve EC-177, "Description"
- Knock sensor EC-293, "Description"
- Mass air flow sensor
- PCV valve EC-514, "Description"
- Power steering pressure sensor EC-386, "Description"
- Power valves 1 and 2 EC-518, "Description"
- Refrigerant pressure sensor EC-515, "Description"
- Stop lamp switch EC-448, "Description"
- TCM EC-397, "Description"
- Throttle control motor EC-462, "Description"
- Throttle control motor relay EC-456, "Description"
- Throttle position sensor EC-207, "Description"
- VIAS control solenoid valve 1 EC-442, "Description"
- VIAS control solenoid valve 2
Description
OUTLINE
When a DTC is stored in ECM
When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL
shutoff if the same malfunction
is not detected after performing th ...
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal
conditions.
*2: This signal is sent to the ECM via the ...
Other materials:
Rear window defogger switch
Description
The rear window defogger is operated by turning the rear window defogger
switch ON.
Turns the indicator lamp in the rear window defogger switch ON
when operating the rear window defogger.
Component Function Check
1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that t ...
Illumination
Wiring Diagram
...
P1212 TCS communication line
Description
This CAN communication line is used to control the smooth engine operation
during the TCS operation. Pulse
signals are exchanged between ECM and "ABS actuator and electric unit (control
unit)".
Be sure to erase the malfunction information such as DTC not only for "ABS
actuato ...