S4 Quattro Wagon V8-4.2L (BHF) (2008)
Shift Solenoid: Testing and Inspection
09L, 6 Speed A/T AWD
Solenoid Valve 1, Checking
NOTE: The Solenoid Valve 1 N88 is a component of the Mechatronic unit in the transmission.
Requirements
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The battery voltage must be at least 12.5 Volts.
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All electrical consumers must be switched off.
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The parking brake must be engaged.
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The elector lever must be in the "P" position.
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The Ground (GND) connections to transmission must be OK.
Test sequence
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Disconnect the electrical connector in the - direction of the arrow - and remove it from the Transmission Control Module (TCM) J217.
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Observe safety precautions.
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Check the electrical harness connector for contact corrosion and ingress of water.
If the electrical harness connector is not OK:
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Repair the malfunction.
If the electrical harness connector is OK:
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Check the wiring according to the wiring diagram:
If no malfunctions are found in the wiring:
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Replace the Mechatronic unit in the transmission:
NOTE: The Solenoid Valve 1 N88 is a component of the Mechatronic unit and cannot be replaced separately.
Final procedures
1. Check the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase DTC memory of the Transmission Control Module (TCM) J217. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory
3. Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes