With Generic Scan Tool

Camshaft Position (CMP) Sensor -G40-, Checking

Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram

Test requirements







- The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.
- Ground (GND) connections between engine and chassis must be OK.

Test sequence







- Disconnect 3-pin connectors from Camshaft Position (CMP) sensors. The locations of the Camshaft Position (CMP) sensors are as follows:
A. Cylinder bank 1 Camshaft Position (CMP) Sensor -G40- Right front cylinder head
B. Cylinder bank 2 Camshaft Position (CMP) Sensor 2 -G163- Left rear cylinder head

NOTE:
- Cylinder bank 1 = in direction of travel, right.
- Cylinder bank 2 = in direction of travel, left.
- Before disconnecting harness connectors, mark allocation to component.







- Connect multimeter to terminal 1 (B+) and 3 (Ground -GND-) for voltage measurement for the respective connector for Camshaft Position (CMP) sensor.
- Switch ignition on.
Specified value: at least 9.0 V
- Switch ignition off.

If there is no voltage:
- Connect test box to control module wiring harness. connect test box for wiring test. Test Box, Connecting For Wiring Test







- Check wires between test box and 3-pin connector for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

Vehicles with engine code AHA







Vehicles with engine code ATQ







Continuation for all vehicles
- Also check wires for short circuit to each other.
Specified value: Infinite ohms

If no malfunctions are found in the wires and there was voltage between terminals 1+3:
- Replace the respective Camshaft Position (CMP) sensor:
- Camshaft Position (CMP) Sensor -G40- cylinder bank 1
- Camshaft Position (CMP) Sensor 2 -G163- cylinder bank 2
- 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 errors are found in wires and there was no voltage between terminals 1+3:
- Replace Engine Control Module (ECM).