Intake Flap Motor, Checking
Diagnostic Procedures
Intake Flap Motor, Checking
• Cylinder bank 1 is located in direction of travel, right.
• Cylinder bank 2 is located in direction of travel, left.
• Use only gold-plated terminals when servicing terminals in harness connector.
Special tools, testers and auxiliary items required
• Multimeter (VAG1526) or Multimeter (VAG1715)
• Connector test kit (VAG1594)
• Wiring diagram
Test Prerequisites
• Fuses in E-box (plenum chamber, left) must be OK:
• Battery voltage must be at least 11.5 volts.
• All electrical consumers such as, for example, lights and rear window defroster must be switched off.
• For vehicles with automatic transmission, selector lever must be in P.
• If vehicle is equipped with an A/C system, it must be switched off.
• Ground (GND) connections between engine and chassis must be OK.
• Ignition is switched off.
Cylinder bank 1: Check Motor for intake flap (V157).
Cylinder bank 2: Check Intake Flap Motor 2 (V275).
Intake Flap Motor (V157) Test Sequence
Checking Voltage Supply
- Disconnect 4-pin connector from Motor for intake flap (V157) (- A -).
- Switch ignition on.
- Measure voltage supply between connector terminal 2 and engine Ground (GND):
Specified value: approx. battery voltage
If specified value is not obtained:
- Check wire via Fuse (S11) to Power Supply Relay (Terminal 30, B+) Relay 2 (J689) and Power Supply (Terminal 30, B+) Relay (J317) according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Measure voltage supply between connector terminals 1 + 2:
Specified value: approx. battery voltage
If specified value is not obtained:
- Check Ground (GND) wire terminal 1 to chassis Ground (GND) according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Check Control Module Wires.
Control Module Wires, Checking
- Connect test box ((VAG1598/42)) to Engine Control Module (ECM) (J623) wiring harness using adapter cable ((VAG1598/39-1)) , connecting test box for wiring test.
- Check wires between test box and connector for open circuit according to wiring diagram.
Terminal 3 + socket 60
Terminal 4 + socket 25
Wire resistance: max. 1.5ohms
- Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinite ohms
If no malfunctions are found in wires:
- Replace Motor for intake flap (V157).
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
Intake Flap Motor 2 (V275) Test Sequence
Checking Voltage Supply
- Disconnect 4-pin connector - A - from Intake Flap Motor 2 (V275).
- Switch ignition on.
- Measure voltage supply between connector terminal 2 and engine Ground (GND):
Specified value: approx. battery voltage
If specified value is not obtained:
- Check wire via Fuse (S11) to Power Supply Relay (Terminal 30, B+) Relay 2 (J689) and Power Supply (Terminal 30, B+) Relay (J317) according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] , Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Measure voltage supply between connector terminals 1 + 2:
Specified value: approx. battery voltage
If specified value is not obtained:
- Check Ground (GND) wire terminal 1 to chassis Ground (GND) according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ]
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Check Control Module Wires.
Control Module Wires, Checking
- Connect test box ((VAG1598/42)) to Engine Control Module 2 (J624) wiring harness using adapter cable ((VAG1598/39-1)) , connecting test box for wiring test.
- Check wires between test box and connector for open circuit according to wiring diagram.
Terminal 3 + socket 60
Terminal 4 + socket 25
Wire resistance: max. 1.5ohms
- Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinite ohms
If no malfunctions are found in wires:
- Replace Intake Flap Motor 2 (V275).
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.