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Repair manual

Tests W/ Codes 2.5L V6 Saab 900 II

Step-by-step instructions on "Tests W/ Codes 2.5L V6" for Saab 900 II (1993–1998). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

Shorting To Ground (Resistance Measurement)

PWM Measurement

Measurement With A Voltmeter

Measurement With An ISAT Or Multimeter With A Pulse Measuring Function

Measurement With Logic Probe

Measurement With An Oscilloscope

Additional PWM Information

Intermittent Faults

MOTRONIC 2.8.1 control module

Intake air temperature sensor

Mass air flow sensor

Throttle position sensor

Idle air control valve (IAC)

Coolant temperature sensor

Ignition coils

Spark plugs

Crankshaft position sensor

Camshaft position sensor

Knock sensors

Oxygen sensors 1 and 2

Injectors

Canister Purge (CP) valve

Fuel pressure regulator

Secondary air injection pump

Fuel pump

Control module inputs

Control module outputs

Control module (ECM)

Control module power supply

Note

Battery voltage +30

+15 voltage

Power ground, G7P

Lambda reference ground, G7L

Signal ground, G7S

Sensor ground

Checking of grounding points

Lamp flash codes

CHECK ENGINE lamp (MIL)

Throttle angle

Air temperature

Fuel consumption

Ignition/trigger pulses

Engine speed (Td)

Knock sensors 1 and 2

Evaporative emission canister

EVAP canister purge valve

Main relay

Fuel pump relay

Wheel speed

D/R input

Input from AC/ACC

Checking function

"READ FUNCTIONS" Command Menu

"ACTIVATE" Command Menu

"READ ON/OFF" Command Menu

"INITIATE" command menu

"READ SYSTEM INFO" Command Menu.

Condition

To Fit

Checking Fuel Pressure/Fuel Pump

Refitting Filter And Pump

To Check

Refitting Vacuum Valve

Refitting Control Valve

Refitting Non-Return Valve