Discovery II
ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-59
⇒
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
HO
2
sensor fault;
l
HO
2
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.
