STARTER MOTOR Volvo XC90 I рестайлинг

STARTER MOTOR

The starter motor is on the left-hand side of the engine by the air cleaner (ACL) housing. The starter motor is powered directly from the battery. There is a solenoid on the starter motor to close the circuit. The central electronic module (CEM) activates a relay in the relay box in the engine compartment to act on the solenoid. This supplies the solenoid with power and closes the circuit for the starter motor.

The starter motor turns when the key is turned to position III in the ignition switch.

There are different functions which prevent starting, depending on whether the car has an automatic or manual transmission. The central electronic module (CEM) also has an electronic immobilizer function which communicates with a transponder in the key.

1. Cars with manual transmissions have a sensor in the clutch pedal. The clutch pedal must be depressed to allow starting (certain markets)
2. In cars with type 4T65EV automatic transmissions, a signal is transmitted from the gear-shift position sensor to the transmission control module (TCM) which then sends a directly connected signal to the central electronic module (CEM)
3. In cars with AW automatic transmissions, a directly connected signal is transmitted directly from the gear-shift position sensor to the central electronic module (CEM).

There are diagnostics for the relay for the starter motor.

Scheme 263

If the car has speed dependent power steering to control the steering assistance, there is a solenoid which controls a hydraulic valve on the steering gear.

The solenoid is controlled by the power steering control module. This receives speed data from the directly connected speed signal from the central electronic module (CEM).

The power steering control module uses a signal to check the solenoid. The solenoid deploys the valve on the steering gear to the required degree and regulates the oil in the steering gear to reduce or increase the servo assistance. The steering assistance increases at lower speeds and is reduced at higher speeds.

There are no diagnostics for the power steering.

Scheme 264

The start time of the heater is programmed as follows

1. the desired parking function is selected by turning the ring on the control stalk
2. the desired time is selected by turning the ring on the control stalk
3. press the RESET button.

Direct start can also be used to start the heater.

The climate control module (CCM) is activated when the engine coolant temperature (ECT) is greater than +20 °C. The blower fan starts and distributes the air in the passenger compartment.

Certain conditions must be met before the heater can start. These are

1. Quantity of fuel greater than 4 liters
2. No diagnostic trouble codes (DTCs) that will prevent starting are stored in the central electronic module (CEM)
3. The airbags have not deployed.

When the conditions are met, the heater glow plug is activated for 1 minute. If the voltage has dropped below 11.5 V, the climate control module (CCM) is switched off. The heater and the climate control module (CCM) are stopped if the voltage falls below 11.3 V. A message indicating low battery voltage is displayed in the driver information module (DIM). These voltage values apply even if the heater is operating normally.

To minimize the risk of the fuel pump for the heater failing due to lack of use, the central electronic module (CEM) sends a signal every week to the combustion preheater module (CPM) to activate the pump for approximately 1 second. This takes place when the ignition is switched off.

Remote start of parking heater (Applies from and incl. structure week 201020)

With remote start of parking heater it is possible to set timers for the parking heater as well as direct start of the parking heater via a computer with internet connection or via mobile telephone. Only applies to vehicles with Phone module (PHM).