Testing and Inspection for A/C Signal in A4 Quattro Wagon V6-28L (AHA) (1998)
Display Group 50
Continuation
If the displayed values are NOT OK:
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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
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Check wiring for open circuit, short circuit to B+ or short circuit to Ground between ECM/test box terminal 8 and either A/C control head -E87- or
Transmission Control Module (TCM).
If the wiring is OK:
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Check function of A/C control head -E87-.
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Carry out electrical testing of automatic transmission.
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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