CAMSHAFT ADJUSTMENT VALVE, CHECKING
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools and workshop equipment required
- Multimeter
- Wiring diagram
Test requirements
Scheme 267
- The Camshaft Adjustment Valve 1 -N205- fuse OK.
- Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK
Start diagnosis
Remove the engine cover with air filter. Refer to appropriate service information.
Scheme 268
Disconnect Camshaft Adjustment Valve 1 -N205- electrical harness connector -1-.
Scheme 269
Using a multimeter, check the Camshaft Adjustment Valve 1 -N205- for resistance.
Scheme 270
Specified value: 5.0 to 8.0 ohms (at approx. 20° C)
If the specified value was not obtained
Replace the Camshaft Adjustment Valve 1 -N205-. Refer to appropriate service information.
If the specified value was obtained
Checking voltage
Switch the ignition on.
Using a multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 1 to the Engine Control Module (ECM) Power Supply Relay -J271- terminal 8/87 for voltage.
Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained
Check the wiring connections for an open circuit.
Check the wiring connection for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used, perform the following step.
Install the test box.
If the manufacturers test box is not being used, perform the following step.
Remove the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.
Using a multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 2 to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal for an open circuit.
Scheme 271
| Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal | Engine Control Module (ECM) -J623- electrical harness connector T60 terminal or test box socket |
|---|---|
| 2 | 60 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit.
Check the wiring connection for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was not OK
Replace the Engine Control Module (ECM) -J623-. Refer to appropriate service information.
Install the engine cover with air filter. Refer to appropriate service information.
Final procedures
After the repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(ref-505626-S15848594322012100100000) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(ref-505626-S01842693502012100100000) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(ref-505626-S05873075672012100100000) .
CAMSHAFT ADJUSTMENT ACTUATORS, CHECKING
The following procedure is used to diagnose Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373- which are controlled by Engine Control Module - J623-.
Special tools and workshop equipment required
- multimeter.
- Wiring diagram.
Test requirements
- The Engine Control Module - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .
Start diagnosis
Disconnect appropriate Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373- electrical harness connectors.
Checking internal resistance
Using a multimeter, check the Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373- pins 1 and two, for resistance.
Specified value: 5.0 to 10.0 ohms (at approx. 20° C)
If the specified value was not obtained
Replace the appropriate Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373-. Refer to the appropriate service information.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used, perform the following step.
Install the test box.
If the manufacturers test box is not being used, perform the following step.
Remove the Engine Control Module -J623-. Refer to the appropriate service information.
Using a multimeter, Check the Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373- electrical harness connector to the Engine Control Module - J623- electrical harness connector for resistance.
| Cam Adjustment Actuators -F366, F367, F368, F369, F370, F371, F372, F373- electrical harness connector terminals | Engine Control Module - J623- electrical harness connector T60 terminals or test box sockets |
|---|---|
| F366 1 | T 60- 2 |
| F367 1 | T 60- 17 |
| F368 1 | T 60- 20 |
| F369 1 | T 60- 9 |
| F370 1 | T 60- 3 |
| F371 1 | T 60- 10 |
| F372 1 | T 60-19 |
| F373 1 | T 60-4 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the wiring connection for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and the resistance was OK
Replace the Engine Control Module -J623-. Refer to the appropriate service information.
Assembly is performed in the reverse order of the removal, note the following
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(ref-505626-S15848594322012100100000) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(ref-505626-S01842693502012100100000) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(ref-505626-S05873075672012100100000) .