Test sequence
- Connect vehicle diagnostic, test and information system VAS 5051 and select vehicle system "01 - Engine electronics". When doing this ignition must be on.
See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS 5051, CONNECTING AND SELECTING FUNCTIONS .
Display on VAS 5051:
- Select diagnosis function "03 - Final control diagnosis" from menu -1-
- Press the > button repeatedly until following display appears:
Display on VAS 5051:
A - Actuator test is waiting - Continued switching required
3 - Secondary Air Injection (AIR) Pump Relay -J299-
- Press the > button.
Display on VAS 5051:
A - Actuator is running - Continued switching allowed
- Secondary air pump relay (position 1 on 3-way relay carrier in electronics box in plenum chamber) should activate and Secondary Air Injection (AIR) Pump Motor -V101- should run at intervals.
- Press the < button to exit from function "03 - Final control diagnosis".
A - If relay does not activate:
- Test voltage supply of secondary air pump relay. See TEST SEQUENCE .
- Test activation of secondary air pump relay. See TESTING ACTIVATION OF SECONDARY AIR PUMP RELAY .
B - If relay activates but secondary air pump motor does not run:
- Test voltage supply of secondary air pump motor. See TESTING VOLTAGE SUPPLY TO SECONDARY AIR PUMP MOTOR .