A4 Quattro Wagon V6-2.8L (AHA) (1998)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) Sensor, Checking
Required special tools and test equipment
-
VAG1598/22 test box
-
Multimeter US1119 (Fluke 83 or equivalent)
-
VW1594 connector test kit
-
Wiring diagram
Checking
-
Disconnect 3-pin harness connector from engine speed sensor.
-
Connect VAG1598/22 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting
VAG 1598/22 Test Box" See: Testing and Inspection
-
Check wiring for open circuit between ECM/test box and 3-pin harness connector.
-
Connector terminal 1 to ECM/test box socket 67
-
Connector terminal 2 to ECM/test box socket 63
-
Connector terminal 3 to ECM/test box socket 56
-
Specified value: max. 1.5 Ohms
-
Check wiring for short circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
-
Connector terminal 2 to ECM/test box socket 67
-
Connector terminal 1 to ECM/test box socket 63
-
Connector terminal 1 to ECM/test box socket 56
-
Specified value: Infinity Ohms
If wiring is OK:
-
Replace engine speed (RPM) sensor -G28-.
-
Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" See: Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" See: Testing and Inspection