Activating components/functions

Activate the Volvo Scan Tool (ST) Components/functions by pressing the YES/NO button to start and stop activation.

Turn Ignition Key to position II, engine not running.

No.	Component	Function
1	AIR PUMP	Pulsed secondary air injection system (PAIR) pump Pulsed secondary air injection system (PAIR) pump is on for 3 seconds, off for 3 seconds, on for 3 seconds for a total of 30 seconds. The pulsed secondary air injection system (PAIR) pump can be heard clearly.
2	SAS VALVE	Pulsed secondary air injection system (PAIR) solenoid valve The solenoid valve is open for 0.5 second, closed for 0.5 second, open for 0.5 second for a total of 30 seconds.
3	FUEL PUMP	Fuel pump (FP) The engine control module (ECM) controls the fuel pump (FP) relay with a 42 Hz signal for 30 seconds. In turn the relay controls the fuel pump (FP). It is hard to hear if the pump is operating, but by listening carefully one can hear the pump start/stop.
4	EVAP-VALVE	Canister purge (CP) valve The canister purge (CP) valve is open for 1 second, closed for 1 second, open for 1 second for a total of 30 seconds. The canister purge (CP) valve clicks.
5	CANISTER VALVE*	EVAP canister shut-off valve The EVAP canister shut-off valve is open for 1 second, closed for 1 second, open for 1 second for a total of 30 seconds. The EVAP canister shut-off valve clicks.
6	HEAT HO2S 1	Front heated oxygen sensor (HO2S) preheating Preheating is on for 12 ms, off for 0.5 seconds, on for 12 ms for a total of 30 seconds. Use a voltmeter to check the signal, t=12 ms/ f=1.9 Hz.
7	HEAT HO2S 2	Rear heated oxygen sensor (HO2S) preheating Preheating is on for 12 ms, off for 0.5 seconds, on for 12 ms for a total of 30 seconds. Use a voltmeter to check the signal, t=12 ms/ f=1.9 Hz.
8	ENG FAN LOW-SPD	Engine cooling fan (FC) low-speed Engine cooling fan (FC) runs at low-speed is for 3 seconds, off for 3 seconds, runs at low-speed for 3 seconds for a total of 30 seconds. The engine cooling fan (FC) can be heard clearly.
9	ENG FAN HI-SPD	Engine cooling fan (FC) high-speed Engine cooling fan (FC) runs at low-speed is for 3 seconds, off for 3 seconds, runs at low-speed for 3 seconds for a total of 30 seconds. The engine cooling fan (FC) can be heard clearly.
10	INJECTOR. 1	Injector 1 The injector is open for 12 ms, closed for 1 second, open for 12 ms etc for a total of 10 seconds. The injector clicks.
11	INJECTOR. 2	Injector 2 The injector is open for 12 ms, closed for 1 second, open for 12 ms etc for a total of 10 seconds. The injector clicks.
12	INJECTOR. 3	Injector 3 The injector is open for 12 ms, closed for 1 second, open for 12 ms etc for a total of 10 seconds. The injector clicks.
13	INJECTOR. 4	Injector 4 The injector is open for 12 ms, closed for 1 second, open for 12 ms etc for a total of 10 seconds. The injector clicks.
14	INJECTOR. 5	Injector 5 The injector is open for 12 ms, closed for 1 second, open for 12 ms etc for a total of 10 seconds. The injector clicks.
15	IAC VALVE	Idle air control (IAC) valve Opening coil activated for 0.25 second, closing coil activated for 0.25 second, opening coil activated for 0.25 second for a total of 30 seconds. The idle air control (IAC) valve clicks.
16	Air conditioning (A/C) relay	Air conditioning (A/C) relay The relay is operated for 1 second, released for 1 second, operated for 1 second etc. The air conditioning (A/C) relay and compressor click. The air conditioning (A/C) system must be on and the blower fan switch on low-speed.
17	RPM	Engine speed (RPM) signal to combined instrument panel. The engine control module (ECM) transmits a signal to the combined instrument panel corresponding to approximately 1250 rpm (the signal is high for 12 ms and low for 12 ms) for a total of 30 seconds. The tachometer in the combined instrument reads approximately 1250 rpm.
18	ECT	Engine coolant temperature (ECT) signal to the combined instrument panel The engine control module (ECM) transmits a signal to the combined instrument panel corresponding to approximately 102°C (the signal is high for 24 ms and low for 24 ms) for a total of 30 seconds. Because of the slowness of the temperature gauge, it will not reach this temperature before the function is interrupted.
19	MIL	Malfunction indicator lamp (MIL) in combined instrument panel The lamp is lit for 1 second, out for 1 second, lit for 1 second for a total of 30 seconds. The malfunction indicator lamp (MIL) is flashing
20	LOAD TQ	Load signal to automatic transmission. The engine control module (ECM) transmits a signal to the transmission control module (TCM) which is low for 12 ms and high for 12 ms for a total of 30 seconds. Use a voltmeter to check the signal, t=12 ms/ f=41Hz.