Secondary Air Injection Pump Relay -J299- / Secondary Air Injection Pump Motor -V101-, CHECKING

WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

General Description

The secondary air injection system sends air into the exhaust using passages in the cylinder head. This extra air injection takes place using the Secondary Air Injection Pump Motor -V101- that is powered by the Secondary Air Injection Pump Relay -J299- on a cold-start of the engine for about 45 - 100 s and serves to quickly heat the catalytic converter(s) for improved emissions.

Special tools and workshop equipment required

Multimeter.
Wiring Diagram.
Scan Tool.

Test Requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
Coolant Temperature: ≥ 80° C.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .
For Hybrid vehicles refer to: HIGH VOLTAGE SYSTEM GENERAL WARNINGS .

Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	-- YES: GO TO: Step 2 -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. REMOVE: Secondary Air Injection Pump Relay -J299- from fuse box. Refer to appropriate repair information. IGNITION: ON. CHECK: Secondary Air Injection Pump Relay -J299- socket terminals A4a and A4c to ground for voltage. IGNITION: OFF. SPECIFIED VALUE: Battery voltage. -- Were Values obtained?	-- YES: GO TO: Step 3 -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 7
3	CONNECT: Jumper wire, between the Secondary Air Injection Pump Relay -J299- socket terminals A4a and A4b. IGNITION: ON. SPECIFIED VALUE: Secondary Air Injection Pump Motor -V101- should be heard running. IGNITION: OFF. -- Was Value obtained?	-- YES: GO TO: Step 4 -- NO: GO TO: Step 5
4	REMOVE: Jumper wire, between the Secondary Air Injection Pump Relay -J299- socket terminals A4a and A4b. REMOVE: Engine Control Module -J623-. Refer to appropriate repair information. CHECK: Secondary Air Injection Pump Relay -J299- socket terminal A4d to the Engine Control Module -J623- harness connector T94 / 49 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Secondary Air Injection Pump Relay -J299-. Refer to appropriate repair information. GO TO: Step 7 -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 7
5	REMOVE: Jumper wire, between the Secondary Air Injection Pump Relay -J299- socket terminals A4a and A4b. DISCONNECT: Secondary Air Injection Pump Motor -V101- harness connector. CHECK: Secondary Air Injection Pump Relay -J299- socket terminal A4b to the Secondary Air Injection Pump Motor -V101- harness connector terminal 2 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: GO TO: Step 6 -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 7
6	CHECK: Secondary Air Injection Pump Motor -V101- harness connector terminal 1 to ground for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Secondary Air Injection Pump Motor -V101-. Refer to appropriate repair information. GO TO: Step 7 -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 7
7	Final Procedure Perform a road test to verify repair. -- Does the original DTC return?	-- YES: CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins. REPAIR: As necessary. If all electrical connections are OK: REPLACE: Engine Control Module -J623-. Refer to appropriate repair information. Clear the DTCs. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY . Repair is complete. Generate Readiness Code. Refer to READINESS CODE . Return vehicle to Customer. -- NO: Perform the diagnostic procedure for any DTC's. If no DTC's return, the repair is complete. Return vehicle to customer.