Section 40 (Ignition And Control Systems - General Diagnostics And Tests (Coupe))
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
- Cleaning And Greasing Components (B5234T3; B5254T; 1998)
- Connecting The Breakout Box. MOTRONIC 4.4 (B5234T3; B5254T; 1998)
- Testing Air Conditioning (A/C) System Input/Output Signals (B5234T3; B5254T; 1998)
- Checking air conditioning (A/C) relay signal and air conditioning (A/C) compressor signal
- Checking air conditioning (A/C) relay and compressor signals
- Checking air conditioning (A/C) relay signal
- Checking the air conditioning (A/C) compressor signal
- Cleaning idle air control (IAC) valve connector
- Replacing idle air control (IAC) valve
- Checking air conditioning (A/C) compressor signal cable
- Checking for contact resistance and oxidation
- Checking for an open-circuit
- Checking air conditioning (A/C) relay signal cable
- Connecting breakout box (connector B)
- Checking air conditioning (A/C) relay and compressor signals
- Checking the air conditioning (A/C) system
- Checking the air conditioning (A/C) system
- Introductory check
- Checking fuse
- Checking for a short-circuit
- Checking the signal cable
- Checking for an open-circuit
- Checking the power supply to relay base terminal 1
- Fault-tracing information
- Checking the power supply from the air conditioning (A/C) switch
- Checking the power supply to the air conditioning (A/C) switch
- Checking the power supply to relay base terminal 2
- Checking air conditioning (A/C) relay
- Checking the power supply from the blower fan switch
- Checking the voltage supply to the blower fan switch
- Checking the power supply to the pressure switch (Pressostat)
- Checking the pressure switch (Pressostat) resistance
- Checking the power supply to the compressor
- Connecting breakout box (connector B)
- Information
- Checking the air conditioning (A/C) system
- Checking air conditioning (A/C) relay signal and air conditioning (A/C) compressor signal
- Testing High Tension Sides (B5234T3; B5254T; 1998)
- Checking high tension section and injector
- Checking high tension voltage
- Checking high tension voltage
- Checking ignition spark
- Checking ignition discharge module (IDM) power cable
- Checking component
- Checking for an open-circuit
- Checking the ignition discharge module (IDM) ground lead
- Checking ignition discharge module (IDM) ground terminal
- Fault-tracing information
- Checking ignition discharge module (IDM) control signal
- Checking signal cable voltage
- Checking for a short-circuit
- Checking signal cable resistance to ground
- Checking ignition spark from the ignition coil
- Replacing ignition coil/ignition discharge module (IDM)
- Checking rotor and distributor cap
- Checking for contact resistance and oxidation
- Checking for damage
- Checking spark plugs
- Checking engine speed (RPM) sensor signal
- Verify
- Information
- Checking high tension voltage
- Checking ignition cables, distributor cap and rotor
- Checking ignition retardation due to knocking
- Checking spark plugs
- Testing Transmission Input/Output Signals (B5234T3; B5254T; 1998)
- Checking signal from the transmission control module (TCM)
- Checking signal from the transmission control module (TCM)
- Checking signal from AW 50-42
- Cleaning idle air control (IAC) valve connector
- Replacing idle air control (IAC) valve
- Checking signal cable, continuously in P or N
- Fault-tracing information
- Checking for a short-circuit to supply voltage
- Checking for an open-circuit
- Checking signal cable, continuously in R/D/3/L
- Checking for a short-circuit to ground
- Connecting the breakout box
- Verification
- Information
- Checking signal from the transmission control module (TCM)
- Checking signal from the transmission control module (TCM)
- Tests Of Sensors And Controllers (B5234T3; B5254T; 1998)
- Checking camshaft position (CMP) sensor signal
- Connecting breakout box, connector A
- Checking camshaft position (CMP) sensor signal
- Faulty signal. Permanent fault
- Notes
- Checking ground lead
- Checking control module connector
- Fault-tracing information
- Checking for an open-circuit
- Checking power cable
- Checking the signal cable
- Checking signal cable voltage
- Checking for a short-circuit
- Checking signal cable resistance to ground
- Checking camshaft position (CMP) sensor
- Checking for contact resistance and oxidation
- Replacing camshaft position (CMP) sensor
- Checking camshaft position (CMP) sensor signal
- Verification
- Information
- Checking engine coolant temperature (ECT) sensor signal
- Checking engine speed (RPM) sensor signal
- Engine speed (RPM) sensor signal, checking
- Signal missing. Permanent fault
- Notes
- Checking engine speed (RPM) sensor resistance
- Replacing engine speed (RPM) sensor
- Checking ground lead
- Checking engine control module (ECM) ground terminals
- Checking for an open-circuit
- Checking signal cable resistance to ground
- Checking for a short-circuit
- Checking control module connector
- Fault-tracing information
- Checking for a short-circuit to supply voltage in signal cable
- Checking the engine control module (ECM) connector
- Checking for contact resistance and oxidation
- Checking for damage
- Verification
- Information
- Checking idle air control (IAC) valve
- Checking mass air flow (MAF) sensor
- Checking camshaft position (CMP) sensor signal
- Checking Power And Ground Terminal. Engine Management System (B5234T3; B5244T; B5254T; 1999-2002)
- Checking Power And Ground Terminal. Throttle Unit (B5234T3; B5244T; B5254T; 1999-2002)
- Checking Wiring And Terminals (1998-2002)
- Connecting The Test Box (Aw55-50/51SN; B5234T3; B5244T; B5254T; 1999-2002)
- General Checking Wiring And Connections (1998)