2023 Volvo S90/ S90 Recharge Plug-in Hybrid Gearbox Owners Manual

Safety function

To prevent over-revving of the engine, the gearbox control program has a protective downshift inhibitor.
The gearbox does not permit downshifting/kick-down which would result in an engine speed high enough to damage the engine. Nothing happens if the driver still tries to shift down in this way at high engine speed – the original gear remains engaged.
On kick-down the car can shift down one or more steps at a time, depending in engine speed. The car shifts up when the engine has reached is maximum engine speed in order to prevent engine damage.

Launch function

Launch can be used when maximum acceleration is required from stationary. The function is available in the following drive modes: Hybrid, Constant AWD and Power.

Activate Launch

Make sure the car is stationary and the wheels are pointing straight forward.
Move to gear position D.
Depress the brake pedal fully.
Then fully depress the accelerator pedal.
Release the brake pedal within 2 seconds.

Note
If the Launch function does not work, wait a few minutes and let the drivetrain cool down to working temperature before retrying.

Important
The drivetrain is subject to wear and tear when using Launch and therefore the function is only available a limited number of times.

Gearbox

The gearbox is part of the car’s powertrain (power transmission) between engine and drive wheels. The function of the gearbox is to change the gear ratio depending on speed and power requirements.
The car has an eight-speed automatic gearbox, and an electric motor for rear-wheel drive. The number of gear changes means that the engine’s torque and power range can be used effectively.
Two of the gears are overdrive gears that save fuel when driving at constant engine speed. The driver display shows the selected gear position.

Gear positions

Gears are selected automatically so that you can drive as energy-efficiently as possible. The gearbox also has a manual gearshift mode.

Overview of gear lever and shift pattern in the driver display.
The driver display shows the selected gear position:

P, R, N, D or B.

Changing gear with automatic gearbox

Change gear position by pressing the spring-loaded gear selector forwards or backwards, or sideways for manual shifting.

Changing gear

Overview of gear lever and gear positions.

Gear positions

Parking – P

Overview of gear lever and position P.
Parking is activated with the P button located next to the gear selector.
The gearbox is mechanically blocked when the P position is engaged.
Select position P for parking. The car can start in position P. The car must be stationary when the P position is selected.
To park – first apply the parking bake and then select P position.

Warning
Always use the parking brake when parking on an inclined surface. Engaging a gear or the automatic transmission’s P position is not sufficient to hold the car stationary in all situations.

Note
To be able to lock the car and arm the alarm, the gear position must be in P.

Help functions

The system will change to the P position automatically:

if the car is switched off in D or R position when stationary.
if the car is moving at low speed when the driver unbuckles the seatbelt and opens the driver’s door without a pedal depressed.

To park a car without wearing the seatbelt and with the door open – exit the P position by selecting R or D again.If the car is switched off in N position there is no automatic change-over to P position. This makes it possible to wash the car in an automatic car wash.

Reverse – R
Select position R to reverse. The car must be stationary when the R position is selected.

Neutral – N
The car freewheels in position N. The car can start in position N. Apply the parking brake if the car is stationary with the gear selector in the N position.In order to change from N position to another gear position, the brake pedal must be depressed and the engine running.

Drive position – DD is the normal driving position. Shifting up and down takes place automatically based on the level of acceleration and speed.The car must be stationary when changing gear from R position to D position.

Note
It is possible to change between D/R at very low speed without your foot on the brake in order to facilitate parking, for example.

Brake position – B

Overview of brake positions in the driver display.

In B position, it is possible to change gear manually. The car brakes using its electric motor when the accelerator pedal is released, while also charging the hybrid battery.

Position B is selected by moving the gear selector backwards from the D position.

Press the gear selector to the right to “+” (plus) to change up one step and release it.
Press the gear selector to the left to “–” (minus) to change down one step and release it.
Press the gear selector backwards to return to the D position.

The gearbox automatically shifts down if the speed decreases to a level lower than appropriate for the selected gear, in order to avoid jerking and stalling.

Symbols and messages for the transmission

If a fault should occur in the gearbox, a symbol and a message are shown in the driver display.

Important
To prevent damage to any drive system components, the working temperature of the gearbox is checked. If there is a risk of overheating, a warning symbol illuminates in the driver display and a text message is shown – follow the recommendation given.

Symbol	Specification
	An error has occurred in the transmission. Read the message in the driver display.
	Hot or overheated gearbox. Read the message in the driver display.
	Temporary fault on drivetrain. Read the message in the driver display.

All-wheel drive

All-wheel drive (AWD) means that the car is driving all four wheels at the same time, which improves traction.The electric motor that drives the rear wheels enables electric all-wheel drive functionality. All-wheel drive characteristics vary depending on the selected drive mode.

Gear selector inhibitor

The gear selector inhibitor prevents accidental changing between different gear positions in an automatic gearbox.

Automatic gear selector inhibitor
The automatic gear selector inhibitor has special safety systems.

From park position – P or neutral position – N

In order to move the gear selector from P or N position to another gear position, the engine must be running, the brake pedal must be depressed and the ignition position must be II.
If the gear selector is in the N position and the car has been stationary for at least 3 seconds (irrespective of whether the engine is running) then the gear selector is locked.

Message in the driver display
If the gear selector is inhibited a message is shown in the driver display, e.g. Press brake pedal to activate gear lever.The gear selector is not inhibited mechanically.

Gear shift indicator

The gear shift indicator in the driver display shows the current gear during manual gearshifting and when it is appropriate to engage the next gear for optimum fuel economy.
For eco-driving during manual gear changing, it is important to drive in the right gear and to change gear in good time.

Gear shift indicator in the driver display.
The gear shift indicator is shown in gear position B. The gear shift indicator shows the current gear in the driver display and indicates recommended shifting to a higher gear by a flashing plus sign.

Note
The gear shift indicator is only available in certain markets.

2023 Volvo S90/ S90 Recharge Plug-in Hybrid Gearbox Owners Manual