S4 V8-4.2L (BHF) (2004)
Checking wire connections
-
Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. See: Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring and Component Test
-
Check the following wire connections for open circuit according to wiring diagram:
Harness connector Terminal
Test box Socket
3
108
4
(signal) 93
Specified value: Wire resistance max 1.5 Ohms
-
Check wires for short circuit to each other as well as to B+ and Ground (GND).
-
Specified value: Infinite Ohms (no continuity)
-
If necessary, repair wire connection.
If no malfunctions are found in wires:
-
Replace Engine Control Module (ECM).
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: 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: Testing and Inspection/Scan Tool Testing and Procedures/Mode
4: Reset/Erase Diagnostic Data
3. Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Readiness Code, Generating
-
End diagnosis and switch ignition off.