In the third volume are considered:

• - troubleshooting data
• - trouble codes
• - electrical diagrams;

Contents

Troubleshooting

• Engine
• Engine fault codes
• Symptomatic engine troubleshooting
• Black smoke
• Blue smoke
• White or gray smoke
• High fuel consumption
• Fuel in engine oil
• Mixing engine oil with coolant
• Low power output
• Troubleshooting, intermittent failures
• Sudden loss of power
• Gradual loss of power
• The engine does not reach the set speed
• Low engine power output after vehicle repair
• Unstable engine performance
• Unstable engine idling
• Unstable engine speed at low or high idle speed
• Engine runs erratically or misfires
• Unstable engine speed under load
• Engine speed increases when PTO or cruise control is engaged
• Noise and vibration
• Troubleshooting
• Noise and vibration symptoms
• Component compliance check
• Transmission
• Mechanical clutch, symptomatic troubleshooting
• Transmission VT 1906 RT
• Transmission VT 2206 RT
• Transmission VT 2412 B
• GEARTRONIC gearbox
• Torque converter transmission
• Overview of transmission trouble codes
• Steering
• Steering symptom troubleshooting
• Fault codes
• Checking the axial play of the ball joints of the longitudinal and transverse steering rods
• Brake system
• Brake system malfunction codes
• Fault codes for compact retarder
• Overview of brake system trouble codes
• Air system check list
• Air dryer
• Dehumidifiers AIRDRY option 2
• Compressor
• Compressors 1COMP530, 2COM1080 option 2
• Air dryer
• Suspension
• Pneumatic suspension
• Air suspension fault codes overview
• Troubleshooting the electronically controlled ECS air suspension
• Body, cab and interior
• Seat, belt tensioner
• Heater
• Symptomatic troubleshooting
• Air heater malfunctions
• Fuel pump
• AIR top 2000s fault codes
• Fault code overview
• Electrical equipment
• Battery
• Fault codes, VECU (electronic vehicle control system)
• Instrument cluster fault codes
• Air suspension fault codes overview

Electrical diagrams

• Wiring diagrams of VOLVO FH12 and FH16 cars (up to September 1998)
• Wiring diagram example
• Examples of electrical symbols
• Letter codes of designations of electrical systems on electrical diagrams
• AA diagram: power supply, starting system, immobilizer
• Wiring diagrams
• AC diagram: vehicle ECU control unit
• BL diagram: engine control unit ECU, injection system, preheater, FH12
• BN diagram: engine control unit ECU, injection system, preheater, FH16
• CE diagram: headlights, parking light, parking lights, DRL
• CG diagram: fog lights, rear fog lights
• Diagram CH: additional turning lights (STD) DRIVL2
• CI diagram: two additional cornering light bulbs for low positioning cornering lights (EU) DRIVL2EC
• CK circuit: brake signal
• CL diagram: engine brake
• CN diagram: direction indicator, alarm
• EA diagram: reversing lighting, buzzer
• Diagram ED: loading lighting, towing lighting
• Diagram EJ: roof light, L1H1 / L2H1
• Scheme EK: roof light, L2H2
• Diagram EN: Signal light
• ER scheme: interior lighting, L1H1 / L2H1, alarm / timer
• ES scheme: interior lighting, L2H2 / L2H3, alarm / timer
• EV diagram: cigarette lighter
• FA circuit: beep (beep)
• EX schematic: 12V power supply
• GA scheme: wiper, washer
• HA diagram: climate control
• HB diagram: cab heater, ebersp?cher D1LCC, PH-CAB
• HC schematic: cab and engine heater, WEBASTO THERMO 90, PH-ENGCA
• Diagram HE: electrically heated and adjustable seat
• HG diagram: electrically heated mirrors
• Diagram HH: electrically controlled mirrors
• HK diagram: air dryer
• HM Diagram: fuel filter heater
• HO Diagram: water separator heater
• HP Diagram: electric cab tilt system
• Scheme JA: radio
• KA diagram: electric windows
• Sketch KB: electric sunroof
• KE diagram: SRS (SUPPLEMENTAL RESTRAINT SYSTEM) airbag
• KH scheme: central door lock
• LD diagram: PTO
• LE scheme: dual power take-off
• LG Diagram: differential lock
• LJ diagram: lifting and securing additional axle, RADT-LA
• LL diagram: securing additional bridge, RADT-A6S
• MA diagram: hydraulic auxiliary axle lift, RADT-AR
• MD Diagram: hydraulic auxiliary axle lift, load limiting, RADT-AR
• ME diagram: air suspension, 6x2 / 6x4 / 8x2 / 8x4, SUSPL-EC
• MF diagram: air suspension, 4x2, SUSPL-EC
• MG diagram: rear axle air suspension, 4x2, TRACTOR, SUSPL-EC
• Diagram NA: Instrument Cluster (Left Hand Drive)
• NB diagram: central instrument cluster with tachograph
• NC diagram: instrument cluster (right hand drive)
• Diagram NZ: central instrument cluster without tachograph
• OA diagram: ABS, D-modification
• OB diagram: ABS / ASR, D-modification
• PA diagram: headlight level control
• TB diagram: central lubrication system
• TA diagram: refrigerator
• XA diagram: fuses, key relays
• ZA diagram: earth connections
• ZB diagram: earth connections
• ZD diagram: ADR, battery main switch, current limiter
• Diagram ZE: air heater EBERSP?CHER TMD, ADR-FRA
• Electrical harness
• Ground connections
• Battery cables
• Posting
• Arrangement of elements on the distribution panel
• Fuses on the distribution panel
• Distribution panel relay
• Connector List
• List of components
• Wire color codes
• Abbreviations
• Wiring diagrams of VOLVO FM9, FM12, FH12, FH16, NH12 cars (before September 2005)
• Wiring diagram example
• Letter codes for designations of electrical systems on electrical circuits
• Electrical diagrams
• Cable harnesses
• Wire harnesses
• Fuses
• Relay
• Cable harnesses
• Mass connections
• Layout of elements
• Ground connection points
• Connectors
• Components
• Wire color codes
• Abbreviations