LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Volvo
>>
1987
>>
780 AW71L
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
BOSCH LH-JETRONIC - Engine Control System
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
BOSCH LH-JETRONIC - Engine Control System
Expand All (for easy ctrl-f)
Collapse All
Description
Operation
Electronic Ignition System
Electronic Fuel Injection System
Constant Idle Speed (Cis) System
Trouble Shooting
Engine Will Not Start
Engine Hard To Start (Cold & Warm)
Poor Or No Idle
Excessive Fuel Consumption
Poor Performance (Low Top Speed)
Erratic Idle
Idle Speed Too High
Idle Speed Too Low (Engine Cold)
Jerking, Poor Acceleration
Diagnosis & Testing
Inspection
LH-Jetronic Fuel System
Engine Does Not Start
B230F/Ft
B280F
Engine Starts, But Runs Rough Or Lacks Power
B280F Only
Circuit Checks
Notes
Coolant Temperature Sensor
Cylinder No. 1 Position Sensor (B280F)
Throttle Switch B280F
Knock Sensor B280F
Knock Sensor B230F/FT