S4 V8-4.2L (BHF) (2004)
Specified value: Wire resistance max 1.5 Ohms
-
Check the wire for short circuit to B+ and Ground (GND).
-
Specified value:Infinite Ohms (no continuity)
If no malfunctions are detected:
-
Replace Secondary Air Injection (AIR) Pump Relay -J299-.
Check voltage supply of the Secondary Air Injection (AIR) pump motor
-
Disconnect electrical harness connector -1- at Secondary Air Injection (AIR) Pump Motor -V101-.
NOTE: Disregard the other items.
-
Connect voltage tester, e.g. V.A.G.1527 B, between terminals 1 and 2.
-
Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring and Component Test
-
Bridge terminals 1 and 46 at test box using wires e.g. from V.A.G 1594 A adapter test kit.
-
LED must light up.
If LED does not light up:
-
Check wire connection from terminal 2 of harness connector to Secondary Air Injection (AIR) Pump Relay -J299- (in 3-pin relay carrier, E-Box,
plenum chamber, position 2) for open circuit according to wiring diagram.
-
Check wire connection from terminal 1 of harness connector to Ground (GND) for open circuit according to wiring diagram.
-
Specified value: Wire resistance max 1.5 Ohms
If no malfunctions are detected:
-
Replace Secondary Air Injection (AIR) pump motor -V101-.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check DTC memory see "Mode 3: Check DTC memory". See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Mode 3: Check DTC Memory
2. If necessary, erase DTC memory see "Mode 4: Reset/erase diagnostic data". See: Computers and Control Systems/Testing and Inspection/Scan
Tool Testing and Procedures/Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness
Codes/Readiness Code, Generating