A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
-
Operate starter briefly.
Specified value: approx. battery voltage
-
Switch ignition off.
If specified value is not obtained:
-
Check wire connection from Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in E-box, plenum chamber) via fuse S234
(in fuse holder, position 34) to Fuel Pump (FP) relay for open circuit according to wiring diagram.
Specified value: Wire resistance max 1.5 Ohms
Check activation of the Secondary Air Injection (AIR) pump relay
-
Remove Secondary Air Injection (AIR) pump relay -2-.
-
Connect test box to wiring harness of Engine Control Module (ECM). ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Scan Tool Connecting/Test Box, Connecting For
Wiring and Component Test
-
Check the following wire connection for open circuit according to wiring diagram:
Relay carrier in E-box,
Test box
plenum chamber,
position 2
Terminal
Socket
6
46
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