With Generic Scan Tool
Valve 1 for camshaft adjustment, checking (Vehicles with engine code AWP, AWV, BKF, BNU)
Function
The camshaft adjustment is load- and RPM dependent. The electrical valve for camshaft adjustment switches oil pressure onto camshaft adjuster (mechanical adjustment mechanism), which adjusts the camshaft.
Recommended special tools and equipment
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram
Test requirements
- The respective fuses of the Valve -1- for camshaft adjustment -N205- must be OK.
- Fuel Pump (FP) Relay -J17- must be OK, check.
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.
Test sequence
- Measure resistance between terminals of the respective valve for camshaft adjustment.
Specified value: 10.0 to 18.0 ohms
If specified value is not obtained:
- Replace the valve 1 for camshaft adjustment -205-.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
- Check wires to control module according to wiring diagram
Check wires to control module
- Connect test box to control module wiring harness, connect test box for wiring test.
- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
terminal 2 + socket 115
Wire resistance: max. 1.5 ohms
- Check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohms
- Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.