A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
3-socket relay carrier in E-box,
Measure to
plenum chamber, position 2
terminal
4
Engine Ground (GND)
-
Operate starter briefly.
-
Specification: approx. battery voltage
If specified value is not obtained:
-
Perform following tests marked with dots:
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Check fuse S234 (in fuse holder, position 34).
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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:
Check activation of the Secondary Air Injection (AIR) pump relay
-
Switch ignition off.
-
Remove Secondary Air Injection (AIR) pump relay
-
Connect VAG1527B voltage tester as follows:
3-socket relay carrier in E-box,
Measure to
plenum chamber, position 2
terminal
6
B+
-
Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) pump relay -J299-
-
LED must blink.
If LED does not blink:
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Switch ignition off.
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM.
-
Check following wire connection for open circuit and short circuit to Ground (GND) and
3-socket relay carrier in E-box,
VAG1598/31 test box
plenum chamber, position 2
Bushing
terminal
6
46
-
Repair open circuit or short circuit if necessary.
If no malfunctions are detected: