A4 Quattro Wagon V6-2.8L (AHA) (1998)
Electronic Throttle Control Module: Component Tests and General Diagnostics
Throttle Valve Control Module Power Supply, Checking
Throttle valve control module power supply, checking
-
Disconnect 8-pin harness connector from throttle valve control module -J338-.
-
Connect multimeter US1119 (Fluke 83 or equivalent) between harness connector terminals using adapter cables from VW1594 connector test kit.
-
Switch ignition on, and check voltage. Specified values:
-
Connector terminals 3 and 7 (Ground): 9.0-14.5 volts
-
Connector terminals 4 and 7 (Ground): 4.0-6.0 volts
-
Switch ignition off.
If voltage is NOT OK:
-
Connect VAG1598/22 test box. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/22 Test Box" See:
Powertrain Management/Computers and Control Systems/Testing and Inspection
-
Check wiring for open circuit between ECM/test box and 8-pin harness connector.
-
Connector terminal 3 to ECM/test box socket 69
-
Connector terminal 4 to ECM/test box socket 62
-
Connector terminal 7 to ECM/test box socket 67
-
Specified value: max. 1.5 Ohms
-
Check wiring for short circuit between ECM/test box and 8-pin harness connector.
-
Connector terminal 7 to ECM/test box socket 69
-
Connector terminal 7 to ECM/test box socket 62
-
Connector terminal 4 to ECM/test box socket 67
-
Specified value: Infinity Ohms
-
Reconnect throttle valve control module harness connector.
If wiring is OK:
-
Replace Motronic Engine Control Module (ECM) -J220-.