Engine management system - V8 (Drive cycles): Description and operation (page 2 of 2)

Drive cycle C: 1 Switch ignition on for 30 seconds. 2 Ensure engine coolant temperature is less than 60°C (140°F). 3 Start the engine and allow to idle for 2 minutes. 4 Perform 2 light accelerations (0 to 35 mph (0 to 60 km/h) with light pedal pressure). 5 Perform 2 medium accelerations (0 to 45 mph (0 to 70 km/h) with moderate pedal pressure). 6 Perform 2 hard accelerations (0 to 55 mph (0 to 90 km/h) with heavy pedal pressure). 7 Cruise at 60 mph (100 km/h) for 8 minutes. 8 Cruise at 50 mph (80 km/h) for 3 minutes. 9 Allow engine to idle for 3 minutes. 10 Connect TestBook and with the engine still running, check for fault codes.

NOTE: The following areas have an associated readiness test which must be flagged as complete, before a problem resolution can be verified: l catalytic converter fault; l Evaporative loss system fault; l HO₂ sensor fault; l HO₂ sensor heater fault.

When carrying out a drive cycle C to determine a fault in any of the above areas, select the readiness test icon to verify that the test has been flagged as complete.

Drive cycle D: 1 Switch ignition on for 30 seconds. 2 Ensure engine coolant temperature is less than 35°C (95°F). 3 Start the engine and allow to idle for 2 minutes. 4 Perform 2 light accelerations (0 to 35 mph (0 to 60 km/h) with light pedal pressure). 5 Perform 2 medium accelerations (0 to 45 mph (0 to 70 km/h) with moderate pedal pressure). 6 Perform 2 hard accelerations (0 to 55 mph (0 to 90 km/h) with heavy pedal pressure). 7 Cruise at 60 mph (100 km/h) for 5 minutes. 8 Cruise at 50 mph (80 km/h) for 5 minutes. 9 Cruise at 35 mph (60 km/h) for 5 minutes. 10 Allow engine to idle for 2 minutes. 11 Connect TestBook and check for fault codes.

Drive cycle E: 1 Ensure fuel tank is at least a quarter full. 2 Carry out Drive Cycle A. 3 Switch off ignition. 4 Leave vehicle undisturbed for 20 minutes. 5 Switch on ignition. 6 Connect TestBook and check for fault codes.