Engine Controls - System & Component Testing: Other Volkswagen EuroVan T4 рестайлинг

DATA LINK CONNECTOR

Note. OBD-II regulation (SAE J-1850) has standardized Data Link Connector (DLC) configuration.

Scheme 9

Scheme 10

EUROVAN

Turn ignition off. Connect test equipment. (Scheme 11)or (Scheme 12).

Scheme 11

Scheme 12

EUROVAN 2.8L VR6, ENGINE CODE AES

Note. Output Diagnostic Test Mode is performed with ignition on engine off, unless specified differently in component sequence list.

Output Diagnostic Test Mode for EuroVan 2.8L VR6 engine code AES, activates the following components in given sequence

1. EVAP Canister Purge Valve (N80)
2. EGR Vacuum Regulator Valve (N18)
3. Secondary Air Injection Valve (N112)
4. Secondary Air Injection Pump Relay (J299)
5. EVAP Canister Purge Solenoid Valve (N115)
6. Injector, Cylinder 1 (N30)
7. Injector, Cylinder 2 (N31)
8. Injector, Cylinder 3 (N32)
9. Injector, Cylinder 4 (N33)
10. Injector, Cylinder 5 (N83)
11. Injector, Cylinder 6 (N84)

EUROVAN 2.8L VR6, ENGINE CODE AXK

Note. Output Diagnostic Test Mode is performed with ignition on engine off, unless specified differently in component sequence list.

Output Diagnostic Test Mode for EuroVan 2.8L VR6 engine code AXK, activates the following components in given sequence

1. EVAP Canister Purge Valve (N80)
2. Secondary Air Injection Valve (N112)
3. Secondary Air Injection Pump Relay (J299)
4. Intake Manifold Tuning Valve (N156)
5. Valve 1 For Camshaft Adjustment (N205)
6. EVAP Leak Detection Pump (V144)
7. Valve 2 For Camshaft Adjustment (N208)
8. Injector, Cylinder 1 (N30)
9. Injector, Cylinder 5 (N83)
10. Injector, Cylinder 3 (N32)
11. Injector, Cylinder 6 (N84)
12. Injector, Cylinder 2 (N31)
13. Injector, Cylinder 4 (N33)

IDLE CHECK

1. Before checking idle. There must be no exhaust leaks in between cylinder head and catalytic converter. Coolant temperature needs to be greater than 176°F (80°C). Battery voltage needs to be greater than 11.5 volts. All electrical consumers and A/C need to be switched off. Vehicle in park or neutral, with parking brake on.
2. Connect scan tool to DLC. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000) .
3. Start engine and idle. Using scan tool check for DTCs in memory. Using scan tool, retrieve DTCs. See RETRIEVING CODES. If no DTCs are stored, go to next step. If DTCs are stored, repair as necessary. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table, in appropriate SELF-DIAGNOSTICS article. Using scan tool, clear DTC memory. See CLEARING CODES in appropriate SELF-DIAGNOSTICS article.
4. Briefly increase engine RPM to 3500 and let idle for two minutes. Using scan tool, follow scan tool manufacturer's instructions to check idle speed. For idle specifications, see «IDLE SPEED SPECIFICATIONS»(ref-160798-S03434423602004030100000) table.

IDLE SPEED SPECIFICATIONS

READINESS CODE

Note. Manufacturer recommends use of Scan Tool VAG 1551/1552 or VAS 5051/5052.

Reading Readiness Code

Note. If you are not able to read Readiness Code or Readiness Code needs to be generated. See appropriate SELF-DIAGNOSTICS article.

Readiness code is returned to -0 1 1 0 1 1 0 1- if DTC memory is erased, voltage supply to ECM is lost, or a new ECM is installed. To read readiness code, connect scan tool to DLC. See DATA LINK CONNECTOR. Turn ignition on. Follow scan tool manufacturer's instructions and read Readiness Code. (Scheme 13) Readiness code should display -0 0 0 0 0 0 0 0-. If readiness code displays as specified, testing is complete. If readiness code does not display as specified, generate readiness code.

Scheme 13

AIR INDUCTION SYSTEMS

AIR LEAK CHECKS

Note. Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052.

1. Ensure exhaust system has no leaks. Connect scan tool, see «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000) . Start engine and allow it to idle at closed throttle position. Observe scan tool Oxygen sensor (O2S) and RPM readings.
2. Spray air intake system with Leak Detector Spray (G-001-800-A1). Air intake leaks will draw in leak detector spray. The spray reduces air/fuel mixture ignition and engine RPM, and decreases CO reading. Repair leaks as necessary.

EuroVan 2.8L (Engine Code AXK)

Note. For location of Data Link Connector (DLC), see DATA LINK CONNECTOR . Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052.

Note. When voltage supply to ECM is interrupted, ECM looses all "learned" and/or "basic" values. Serious driveability problems may occur depending on vehicle mileage. A relearn procedure must be performed, see TEST DRIVE RELEARN PROCEDURE .

Note. This test should only be performed if engine performance is poor. Intake manifold switches from long intake path to short at approximately 4500 RPM. Intake Manifold Tuning (IMT) valve (N156) and actuator are located on right side of intake manifold. (Scheme 14)

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Start engine and let idle. Using a second technician, briefly depress accelerator pedal. Check for movement of vacuum actuated IMT linkage and shaft (shaft is located in intake manifold). (Scheme 14) Vacuum actuated IMT linkage and shaft should move, temporarily closing off long manifold runners. Turn engine off. If vacuum actuated IMT linkage and shaft function properly, IMT system is okay. If vacuum actuated IMT linkage and shaft do not operate properly, go to next step.
2. Using a vacuum pump, check vacuum actuator, IMT linkage and shaft operation. If vacuum actuator, IMT linkage and shaft operate properly, go to next step. If vacuum actuator, IMT linkage and shaft do not operate properly, repair or replace as necessary. Verify repair. Test is complete.
3. Turn ignition on. Using scan tool activate IMT valve. IMT valve should audibly click and actuator will operate if vacuum is present in vacuum reservoir. If IMT valve operation is okay, IMT system is okay. If IMT valve does not audibly click, go to next step.
4. Disconnect IMT valve 2-pin harness connector. (Scheme 14) Using adapter cables from Test Kit (VAG 1594), connect Voltage Tester (VAG 1527) to IMT valve 2-pin harness connector. With ignition on, observe voltage tester LED. Voltage tester LED should blink (light to dark). Record results. If LED on voltage tester did not blink, go to next step. If voltage tester LED blinks, using scan tool, stop actuation of IMT valve. Turn ignition off. Replace faulty IMT valve. After repairs, erase DTC memory. Verify repair. Test is complete.
5. Turn ignition on. Check for battery voltage at outgoing side of fuse No. 18. see scheme 10 If battery voltage is present, turn ignition off and go to next step. If battery voltage is not present, check power supply for fuse No. 18. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete.
6. Disconnect ECM harness connector. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check for continuity between IMT 2-pin harness connector terminal No. 2 and test box socket No. 104. (Scheme 15) Using DVOM, check for continuity between IMT valve 2-pin harness connector terminal No. 1 and fuse No. 18. Resistance should be a maximum of 1.5 ohms for each reading. If DVOM measurements are okay, replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 14

Scheme 15

COMPUTERIZED ENGINE CONTROLS

ENGINE CONTROL MODULE (J220) GROUND & POWER CIRCUITS

Note. Before performing test procedure, ensure battery voltage is a minimum of 11.5 volts. Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052. The following tests are preformed using Scan Tool VAG 1551/1552 or 5051/5052. For location of Data Link Connector (DLC), see DATA LINK CONNECTOR .

Note. When voltage supply to Engine Control Module (ECM) (J220) is interrupted, ECM looses all "learned" and/or "basic" values. Serious driveability problems may occur depending on vehicle mileage. A relearn procedure must be performed, see TEST DRIVE RELEARN PROCEDURE .

Note. If a test ends with ECM replacement. Before replacing ECM be certain that, all wiring, power and ground supplies are okay. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

EuroVan 2.8L (AES)

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Ensure battery and engine to body grounds are okay. Repair as necessary. Turn off all electrical consumers and A/C. Shift lever in park (A/T) or neutral (M/T). Battery voltage must a minimum of 11.5 volts. Connect scan tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000) . Start engine and idle.
2. Using scan tool. Read supply voltage for ECM. Voltage should be 12-14.5 volts. End scan tool data output. Turn ignition off. If voltage is less than battery voltage, go to next step. If voltage is more than 14.5 volts, go to step 4 . If voltage checks are okay. ECM power and ground circuits are okay. Test is complete.
3. Check battery, alternator, parasitic load and ECM grounds. See SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. If repairs where performed, repeat steps 1 and 2 . If battery, alternator, parasitic load and ECM grounds are okay, go to step 5 .
4. Possible cause is alternator and/or voltage regulator failure. Repair as necessary. If repairs were performed, repeat steps 1 and 2 . If alternator and voltage regulator are okay, go to next step.
5. Turn ignition off. Connect Test Box (VAG 1598/18) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000) and go to next step. NOTE: If test box is not available. Use wiring diagram and DVOM to check ECM grounds and voltage supply. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
6. Turn ignition on. Using adapter cables from Test Kit (VAG 1594) and a DVOM, measure voltage supply at test box sockets No. 1 and 54 (ground and B+ 30). Battery voltage should be present. Measure voltage supply at test box sockets No. 1 and 23 (ground and ignition 15). Battery voltage should be present. If both voltage checks are okay. ECM power and ground circuits are okay. Test is complete. If voltage is not okay, check wires and wiring connections on relay panel. Repair as necessary. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000) .

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Ensure battery and engine to body grounds are okay. Repair as necessary. Turn off all electrical consumers and A/C. Shift lever in park (A/T) or neutral (M/T). Battery voltage must a minimum of 11.5 volts. Connect scan tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000) . Start engine and idle.
2. Using scan tool. Read supply voltage for ECM. Voltage should be 12-14.5 volts. End scan tool data output. Turn ignition off. If voltage is less than battery voltage, go to next step. If voltage is more than 14.5 volts, go to step 4 . If voltage checks are okay. ECM power and ground circuits are okay. Test is complete.
3. Check battery, alternator, parasitic load and ECM grounds. See SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. If repairs where performed, repeat steps 1 and 2 . If battery, alternator, parasitic load and ECM grounds are okay, go to step 5 .
4. Possible cause is alternator and/or voltage regulator failure. Repair as necessary. If repairs were performed, repeat steps 1 and 2 . If alternator and voltage regulator are okay, go to next step.
5. Turn ignition off. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000) and go to next step. NOTE: If test box is not available. Use wiring diagram and DVOM to check ECM grounds and voltage supply. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
6. Turn ignition on. Using adapter cables from Test Kit (VAG 1594) and a DVOM, measure voltage supply at test box sockets No. 1 and 62 (ground and B+ 30). Battery voltage should be present. Measure voltage supply at test box sockets No. 2 and 3 (ground and ignition 15). Battery voltage should be present. If voltage is okay, test is complete. If voltage is not okay, check wires and wiring connections on relay panel, see SYSTEM WIRING DIAGRAMS article in ELECTRICAL and repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000) .

SENSORS & SWITCHES

CAMSHAFT POSITION SENSOR (G40)

Note. Manufacturers alphanumeric identification varies when identifying Camshaft Position (CMP) sensor(s). Manufacturers alphanumeric identification will be noted in the model specific Camshaft Position (CMP) sensor articles.

Note. Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052). For location of Data Link Connector (DLC), see DATA LINK CONNECTOR .

Note. When voltage supply to ECM is interrupted, ECM looses all "learned" and/or "basic" values. Serious driveability problems may occur depending on vehicle mileage. A relearn procedure must be performed, see TEST DRIVE RELEARN PROCEDURE .

EuroVan 2.8L (Engine Code AES)

Note. Manufacturers alphanumeric identification for CMP sensor for EuroVan 2.8L (engine code AES) is G40.

Scheme 16

Scheme 17

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Ensure Camshaft Position (CMP) sensor is bolted on tightly. Go to next step.
2. Disconnect CMP sensor 3-pin harness connector. (Scheme 16) Turn ignition on. Using DVOM measure voltage between terminals No. 1 and 3 of 3-pin harness connector. (Scheme 17) Voltage should be a minimum of 11.5 volts. Turn ignition off. If readings are okay, go to next step. If readings are not okay, go to next step.
3. Disconnect ECM harness connector. Connect Test Box (VAG 1598/18) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following CMP sensor (G40) harness connector terminals and test box sockets: (Scheme 17) CMP sensor harness connector terminal No. 1 and test box socket No. 23. CMP sensor harness connector terminal No. 2 and test box socket No. 44. CMP sensor harness connector terminal No. 3 and test box socket No. 56. Using DVOM, check for short circuits between the following CMP sensor (G40) harness connector terminals and test box sockets: CMP sensor harness connector terminal No. 3 and test box socket No. 44. CMP sensor harness connector terminal No. 3 and test box socket No. 23. CMP sensor harness connector terminal No. 2 and test box socket No. 23. Resistance should be a maximum of 1.5 ohms for each reading. Check wires in 3-pin harness connector for short circuits to one another.
4. If harness connector circuits are okay and 11.5 volts minimum is present between terminals No. 1 and 3 of 3-pin harness connector, replace CMP sensor. If harness connector circuits are okay, but no voltage is present between terminals No. 1 and 3 of 3-pin harness connector, replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Note. Manufacturers alphanumeric identification for CMP sensor for EuroVan (engine code AXK) is G40 for intake camshaft and G163 for exhaust camshaft.

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Ensure Camshaft Position (CMP) sensors are bolted on tightly. Go to next step.
2. Disconnect CMP sensor 3-pin harness connectors. (Scheme 18) Turn ignition on. Using DVOM measure voltage between terminals No. 1 and 3 of 3-pin harness connector. (Scheme 19) Voltage should be a minimum of 4.5 volts. Turn ignition off. If readings are okay, go to next step to test No. 2 wire in 3-pin harness connector. If readings are not okay, go to next step.
3. Disconnect ECM harness connector. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following CMP sensors harness connector terminals and test box sockets: (Scheme 19) Intake Camshaft CMP sensor (G40) CMP sensor harness connector terminal No. 1 and test box socket No. 98. CMP sensor harness connector terminal No. 2 and test box socket No. 86. CMP sensor harness connector terminal No. 3 and test box socket No. 108. Exhaust Camshaft CMP sensor (G163) CMP sensor harness connector terminal No. 1 and test box socket No. 98. CMP sensor harness connector terminal No. 2 and test box socket No. 87. CMP sensor harness connector terminal No. 3 and test box socket No. 108. Resistance should be a maximum of 1.5 ohms for each reading. Check wires in 3-pin harness connector for short circuits to one another.
4. If harness connector circuits are okay and 4.5 volts minimum is present between terminals No. 1 and 3 of 3-pin harness connector, replace CMP sensor. If harness connector circuits are okay, but no voltage is present between terminals No. 1 and 3 of 3-pin harness connector, replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 18

Scheme 19

ENGINE COOLANT TEMPERATURE SENSOR (G62)

Note. Manufacturers alphanumeric identification for Engine Coolant Temperature (ECT) sensor is (G62).

Note. Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052. For location of Data Link Connector (DLC), see DATA LINK CONNECTOR .

Note. When voltage supply to ECM is interrupted, ECM looses all "learned" and/or "basic" values. Serious driveability problems may occur depending on vehicle mileage. A relearn procedure must be performed. See TEST DRIVE RELEARN PROCEDURE .

Note. Engine must be cold before performing test procedure.

1. Disconnect ECT sensor connector. See «COMPONENT LOCATIONS»(ref-160798-S29023044482004030100000). Using DVOM, measure resistance of ECT sensor between ECT sensor terminals C and D. (Scheme 24) See «ECT SENSOR (G62) RESISTANCE»(ref-160798-S35765715372004030100000) table. If ECT sensor resistance is okay, reconnect ECT sensor connector. Go to next step. If resistance is not okay, replace faulty ECT sensor. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
2. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Connect scan tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000). Turn ignition on. Using scan tool, check ECT sensor temperature value. If ECT sensor temperature value deviates greatly from ECT sensor ambient temperature, go to step 4. If ECT sensor temperature value is approximately the same as ECT sensor ambient temperature, go to next step. NOTE: Next test step tests ECT sensor through its full range. NOTE: Scan Tool VAG 1551/1552 and VAS 5051/5052 displays temperature in 1 to 1.5 degree increments.
3. Start engine and idle. Using scan tool, observe ECT sensor temperature value. Temperature value should steadily increase. If ECT sensor temperature value did not steadily increase, replace faulty ECT sensor. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
4. If ECT sensor temperature value on scan tool increases steadily at approximately coolant temperature, ECT sensor is okay. Erase DTC memory. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). If ECT sensor temperature value is extremely high- approximately 285°F (141°C) - possible cause is short to ground. Go to step 6. If ECT sensor temperature value is extremely low - approximately -50°F (-46°C) - possible cause is open circuit or short to positive. Go to next step.
5. Disconnect ECT sensor connector. (Scheme 23) Using a jumper wire, bridge terminal with Brown/Blue wire and terminal No. 3 of ECT sensor connector. (Scheme 25) Using scan tool, observe ECT sensor temperature value. If ECT sensor temperature value is approximately -50°F (-46°C), turn ignition off. Go to step 7. If ECT sensor temperature value is approximately 285°F (141°C), turn ignition off. Replace faulty ECT sensor. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
6. Disconnect ECT sensor connector. (Scheme 23) Using scan tool, observe ECT sensor temperature value. If after disconnecting ECT sensor connector, temperature value is approximately 285°F (141°C), turn ignition off. Go to next step. If after disconnecting ECT sensor connector, temperature value is approximately -50°F (-46°C), turn ignition off. Replace faulty ECT sensor. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
7. Disconnect ECM harness connector. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Disconnect ECT sensor 4-pin connector. (Scheme 23) Using DVOM, measure resistance between ECT sensor harness connector terminal with No. 3 and test box socket No. 93. (Scheme 25) Record resistance reading. Measure resistance between ECT sensor harness connector terminal No. 4 and test box socket No. 108. Record resistance reading. Resistance should be a maximum of 1.5 ohms for each reading. Go to next step.
8. Check ECT sensor harness connector terminal No. 3 of ECT for short circuit to test box socket No. 108. Check ECT sensor harness connector terminal No. 3 for short circuit to battery positive and ground. Check ECT sensor harness connector terminal No. 4 for short circuit to battery positive. Repair as necessary. If repairs where made, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). If wiring and ECT sensor are okay, replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Note. Engine must be cold before performing test procedure.

1. Disconnect ECT sensor 2-pin connector. (Scheme 22) Using DVOM, measure resistance of ECT sensor between ECT sensor terminals No. 1 and 2. See «ECT SENSOR (G62) RESISTANCE»(ref-160798-S35765715372004030100000) table. If ECT sensor resistance is okay, reconnect ECT sensor connector. Go to next step. If resistance is not okay, replace faulty ECT sensor. After repairs, erase DTC memory. Go to next step.
2. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Connect scan tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000). Turn ignition on. Using scan tool, check ECT sensor temperature value. If ECT sensor temperature value deviates greatly from ECT sensor ambient temperature, go to step 4. If ECT sensor temperature value is approximately the same as ECT sensor ambient temperature, go to next step. NOTE: Next test step tests ECT sensor through its full range. NOTE: Scan Tool VAG 1551/1552 and VAS 5051/5052 displays temperature in 1 to 1.5 degree increments.
3. Start engine and idle. Using scan tool, observe ECT sensor temperature value. Temperature value should steadily increase. If ECT sensor temperature value did not steadily increase, remove engine sound insulation cover. (Scheme 20) Check vacuum hose and coolant recirculating valve, recirculating valve should close when vacuum is applied. (Scheme 21) Repair as necessary. If repairs where made, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). If coolant recirculating valve is okay and temperature value did not steadily increase, replace faulty ECT sensor. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
4. Disconnect ECM harness connector. Connect Test Box (VAG 1598/18) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Disconnect ECT sensor 2-pin connector. (Scheme 22) Using DVOM, measure resistance between ECT sensor harness connector terminal No. 1 and test box socket No. 14. see scheme 31 Record resistance reading. Measure resistance between ECT sensor harness connector terminal No. 2 and test box socket No. 33. Record resistance reading. Resistance should be a maximum of 1.5 ohms for each reading. Go to next step.
5. Check ECT sensor harness connector terminal No. 2 of ECT for short circuit to test box socket No. 14. Check ECT sensor harness connector terminal No. 1 for short circuit to battery positive. Repair as necessary. If repairs where made, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). If wiring and ECT sensor are okay, replace faulty ECM. See ENGINE CONTROL MODULE REMOVAL under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

ECT SENSOR (G62) RESISTANCE

ENGINE SPEED (RPM) SENSOR (G28)

Note. Manufacturers alphanumeric identification for Engine Speed (RPM) sensor is (G28).

Note. Engine Speed (RPM) sensor is a speed and reference sensor. If Engine Speed sensor does not send a signal, engine will not start. If Engine Speed sensor fails when engine is running, engine will stall.

Note. When voltage supply to ECM is interrupted, ECM looses all "learned" and/or "basic" values. Serious driveability problems may occur depending on vehicle mileage. A relearn procedure must be performed, see TEST DRIVE RELEARN PROCEDURE .

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Go to next step.
2. Disconnect grey 3-pin harness connector from Engine Speed sensor. (Scheme 26) Using DVOM measure resistance between terminals No. 2 and 3 of Engine Speed sensor. (Scheme 27) For EuroVan 2.8L with engine code (AXK), resistance should be 480-1000 ohms. Check for short circuit between Engine Speed sensor terminals No. 1 and 2. Check for short circuit between Engine Speed sensor terminals No. 1 and 3. If readings are okay, go to next step. If readings are not okay, replace faulty Engine Speed sensor. Verify repair. Test is complete.
3. Disconnect ECM harness connector. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following Engine Speed sensor (G28) 3-pin harness connector terminals and test box sockets. (Scheme 19) Engine Speed sensor 3-pin harness connector terminal No. 1 and test box socket No. 108. Engine Speed sensor 3-pin harness connector terminal No. 2 and test box socket No. 90. Engine Speed sensor 3-pin harness connector terminal No. 3 and test box socket No. 82. Resistance should be a maximum of 1.5 ohms for each reading. Check wires in Engine Speed sensor 3-pin harness connector for short circuits to one another. Repair as necessary. Verify repair. Test is complete. If readings are okay, go to next step. NOTE: There is a gap in sensor wheel. This gap is the reference mark.
4. Remove Engine Speed sensor. Ensure Engine Speed sensor wheel is secure on sensor shaft. Check Engine Speed sensor for excessive runout and damage. Repair or replace as necessary. Verify repair. Test is complete. If Engine Speed sensor harness connector circuits are okay, and Engine Speed sensor is okay. Replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 26

Scheme 27

1. Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Go to next step.
2. Disconnect white 3-pin harness connector from Engine Speed sensor (G28). (Scheme 28)
3. Disconnect ECM harness connector. Connect Test Box (VAG 1598/18) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following Engine Speed sensor (G28) 3-pin harness connector terminals and test box sockets. (Scheme 29) Engine Speed sensor 3-pin harness connector terminal No. 1 and test box socket No. 67. Engine Speed sensor 3-pin harness connector terminal No. 2 and test box socket No. 68. Engine Speed sensor 3-pin harness connector terminal No. 3 and test box socket No. 56. Resistance should be a maximum of 1.5 ohms for each reading. Check wires in Engine Speed sensor 3-pin harness connector for short circuits to one another. Repair as necessary. Verify repair. Test is complete. If readings are okay, replace faulty Engine Speed sensor. Verify repair. Test is complete.
4. After reconnecting ECM, it is necessary to perform relearn procedure. Turn ignition on for a minimum of 10 seconds. Turn ignition off. Generate readiness code and perform idle check, see SELF-DIAGNOSTICS article. Perform a long road test. Coolant temperature needs to be greater than 176°F (80°C). Idle, partial throttle, full throttle and overdrive, all must be attained several times. During test drive, apply full throttle until engine speed exceeds 3500 RPM.

Scheme 28

Scheme 29

HEATED OXYGEN SENSOR

Heated oxygen sensors will set DTCs. See appropriate SELF DIAGNOSTICS article for diagnoses.

INTAKE AIR TEMPERATURE SENSOR

Note. Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052. For location of Data Link Connector (DLC), see DATA LINK CONNECTOR .

EuroVan - 2.8L Engine Code AXK

1. On EuroVan 2.8L (engine code AXK), IAT sensor is located inside MAF sensor. Turn ignition off. Disconnect IAT sensor connector.
2. Using DVOM, measure resistance of MAF/IAT sensor. Measure resistance between terminals No. 1 and 3 of IAT sensor (Scheme 30) For resistance specification, see «IAT SENSOR (G42) RESISTANCE»(ref-160798-S09579471852004030100000) table.
3. If resistance is okay, go to «IAT SENSOR RANGE & CIRCUIT TESTING: EUROVAN 2.8L (ENGINE CODE AXK)»(ref-160798-S02584655162004030100000) (IAT sensor needs to be tested through its full range). If resistance is not as specified, replace IAT sensor. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 30

Scheme 31

Scheme 32

IAT SENSOR (G42 & G72) RESISTANCE

MASS AIR FLOW SENSOR

Note. Testing is using Scan Tool VAG 1551/1552 or VAS 5051/5052.

1. Ensure all fuses are okay, fuel pump relay must be okay, battery voltage is at least 11.5 volts, all electrical accessories are off and A/C is off. Verify engine is mechanically sound and engine coolant temperature is at least 176°F (80°C). On vehicles with M/T, gear shifter must be in neutral with parking brake set. On vehicles with A/T, selector lever must be in park or neutral with parking brake set. Go to next step.
2. Check air induction system for leaks. Repair as necessary. Verify repair. Test is complete. If no air leaks are found, go to next step.
3. Connect Scan Tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000). Start engine and idle. Using scan tool, check air mass drawn in by engine, see «AIR MASS SPECIFICATIONS»(ref-160798-S35416179052004030100000) table. If reading is okay, go to next step, (voltage supply for MAF sensor needs to be checked). If reading is not okay go to next step, (voltage supply for MAF sensor needs to be checked).
4. Turn ignition off. Disconnect MAF sensor 5-pin connector. Connect DVOM to measure voltage between MAF sensor 5-pin connector, terminal No. 2 and ground. (Scheme 33) Start vehicle and run at idle. Voltage should be a minimum of 11.5 volts. Turn ignition off. If reading is okay, go to step 6. If reading is not okay, go to next step.
5. Check wiring from MAF sensor 5-pin connector, terminal No. 2 and fuel pump relay (J17). See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. Verify repair, go to next step.
6. Turn ignition on. Using DVOM measure voltage between MAF sensor 5-pin connector, terminal No. 4 and ground. Voltage should be 4.5-5.5 volts. If reading is not okay, repair as necessary, go to next step. If reading is okay, go to next step.
7. Disconnect ECM harness connector, leave ECM harness connector disconnected. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following MAF sensor (G70) harness connector terminals and test box sockets. MAF sensor harness connector terminal No. 3 and test box socket No. 27. MAF sensor harness connector terminal No. 4 and test box socket No. 53. MAF sensor harness connector terminal No. 5 and test box socket No. 29. Resistance should be a maximum of 1.5 ohms for each reading. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Go to next step.
8. Check wires in MAF sensor harness connector for short circuits to one another. Check wires in MAF sensor harness connector for short circuits to ground and B+. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Go to next step.
9. If all wiring, voltage checks and grounds are okay and DTC P0101/16485, DTC P0102/16486 or DTC P0103/16487 return, replace MAF sensor (G70).
10. After reconnecting ECM, it is necessary to perform relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

1. Ensure all fuses are okay, fuel pump relay must be okay, battery voltage is at least 11.5 volts, all electrical accessories are off and A/C is off. Verify engine is mechanically sound and engine coolant temperature is at least 176°F (80°C). On vehicles with M/T, gear shifter must be in neutral with parking brake set. On vehicles with A/T, selector lever must be in park or neutral with parking brake set. Go to next step.
2. Check air induction system for leaks. Repair as necessary. Verify repair. Test is complete. If no air leaks are found, go to next step.
3. Connect Scan Tool. See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000). Start engine and idle. Using scan tool, check air mass drawn in by engine, see «AIR MASS SPECIFICATIONS»(ref-160798-S35416179052004030100000) table. If reading is okay, go to next step, (voltage supply for MAF sensor needs to be checked). If reading is not okay go to next step, (voltage supply for MAF sensor needs to be checked).
4. Turn ignition off. Disconnect MAF sensor 4-pin connector. Connect DVOM to measure voltage between MAF sensor 4-pin connector, terminal No. 1 and No. 3. (Scheme 34) Start vehicle and run at idle. Voltage should be a minimum of 11.5 volts. Turn ignition off. If reading is okay, go to step 6. If reading is not okay, go to next step.
5. Check wiring from MAF sensor 4-pin connector, terminal No. 3 and fuel pump relay (J17). See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).
6. Disconnect ECM harness connector, leave ECM harness connector disconnected. Connect Test Box (VAG 1598/18) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, check resistance between the following MAF sensor (G70) harness connector terminals and test box sockets. (Scheme 34) MAF sensor harness connector terminal No. 2 and test box socket No. 16. MAF sensor harness connector terminal No. 4 and test box socket No. 17. Resistance should be a maximum of 1.5 ohms for each reading. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). If resistance readings are okay. Go to next step.
7. Check MAF sensor harness connector terminal No. 4 for short circuits to test box socket No. 16 using ohm meter. Check MAF sensor harness connector terminal No. 2 and harness connector terminal No. 4 for short circuits to B+, by using volt meter in between harness connector terminal No. 2 and vehicle ground, then harness connector terminal No. 4 and vehicle ground. Specification is 0 volts. If all wiring, voltage checks and grounds are okay, replace MAF sensor (G70). If any wiring test is not okay. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. After reconnecting ECM, it is necessary to perform relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).Go to next step.

AIR MASS SPECIFICATIONS

Scheme 33

Scheme 34

Fuel Pump Relay Function

1. Using test light, check voltage supply to fuel pump fuse. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. For fuel pump relay locations, see «FUSE/RELAY LOCATIONS»(ref-160798-S21283635122004030100000) under COMPONENT LOCATIONS.
2. Briefly operate starter motor. Fuel pump relay must audibly click and test light should illuminate. If test light does not illuminate or fuel pump relay does not operate, repair fuel pump relay power supply wiring as necessary. Repair wiring from fuel pump relay to fuel pump fuse as necessary.
3. If fuel pump relay wiring and fuel pump fuse wiring are okay, replace fuel pump relay.

On EuroVan, fuse panel is located behind driver's side storage compartment, below steering column. Turn locking knob counterclockwise to release storage compartment from dash.

FUEL SYSTEMS

FUEL PRESSURE RELEASE

Turn ignition off and remove fuel pump fuse, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Fuel system is under pressure, before disconnecting any fuel system hose or line, cover fuel fitting with a clean shop towel.

FUEL DELIVERY

For fuel pressure, fuel pump volume and fuel amperage draw tests, see FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article.

IGNITION SYSTEMS

IGNITION COIL WITH OUTPUT STAGE

Ignition Coil with Output Stage and Coil on Spark Plug are controlled by ECM. Coil and output stage related problems will set DTCs. See appropriate SELF DIAGNOSTICS article.

IGNITION TIMING CHECKING

Note. Ignition timing is not adjustable. Ignition timing can be checked on EuroVan (2.8L AES) models only. No ignition timing specifications are available from manufacturer for all other models. To check ignition timing use of Scan Tool (VAG 1551/1552) with adapter cable (VAG 1551/3) is recommended. Ignition timing should be checked with engine at operating temperature.

EuroVan (2.8L AES)

Specification (11 to 13 degrees BTDC) in Display in Field "3" on scan tool with engine at 650-750 RPM. Display Field "4" should display a maximum of plus or minus 2 degrees from reading in Display Field "3" at 650-750 RPM.

Checking ignition timing advance. Specification (0 to 50 degrees BTDC) in Display Field "3" with engine at 650-6000 RPM and (0 to 40) degrees in Display Field "4".

EMISSION SYSTEMS & SUB-SYSTEMS

EXHAUST GAS RECIRCULATION

Exhaust gas recirculation (EGR) systems will set DTCs. See appropriate SELF DIAGNOSTICS article for diagnosis.

Locating EVAP Components On Vehicle

1. EuroVan Behind fuel tank at left longmember (frame rail).

Identifying Fuel EVAP Components

Fuel evaporative (EVAP) systems will set DTCs, for most models EVAP DTCs range in low to mid P0440s and P1470s. See appropriate SELF DIAGNOSTICS article for diagnoses. For EVAP component locations.

Scheme 35

Scheme 36

Scheme 37

Scheme 38

POSITIVE CRANKCASE VENTILATION SYSTEM: WITH PCV HEATING ELEMENT (N79)

Note. From model year 2000 on, Positive Crankcase Ventilation (PCV) systems utilize a PCV system with PCV Heating Element (N79). Not all 2.8L engine code AES may be equipped with this device.

1. To check mechanical part of PCV system, locate PCV hose/hoses coming from crankcase and /or valve cover. Make a visual inspection of PCV hoses, fittings and grommets. Check PCV valve located at engine side of air cleaner ducting. When checking PCV valve, air should flow through PCV valve in direction of engine air intake, air pressure should not be able to enter crankcase or valve cover through PCV system.
2. PCV Heating Element (N79) is located at engine side of air cleaner ducting. Harness connector is a 2-pin black harness connector. See «COMPONENT LOCATIONS»(ref-160798-S29023044482004030100000) .
3. To check PCV Heating Element (N79) resistance, disconnect 2-pin black harness connector. Resistance should be 7-12 ohms at about 77°F (25°C).
4. To check voltage and ground supply to PCV Heating Element (N79), start engine and idle. Disconnect black 2-pin black harness connector. Check for voltage at black 2-pin harness connector, battery voltage should be present. If battery voltage is not present, check fuse and wiring. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

IDLE CONTROL SYSTEM

Idle is controlled by THROTTLE VALVE CONTROL MODULE (TVCM), idle related problems will set DTCs. See appropriate SELF DIAGNOSTICS article.

VARIABLE VALVE TIMING SYSTEM

Note. Camshaft adjuster may fail either electrically or mechanically. After verifying or repairing electrical portion of system, camshaft adjuster may still be faulty. Repair camshaft adjuster mechanical failure as necessary. See step 5 .

EuroVan with engine code AXK has an intake and exhaust camshaft adjustment valve. Valve 1, Intake Camshaft Adjustment Valve (N205) and Valve 2, Exhaust Camshaft Adjustment Valve (N208). When using Scan Tool VAG 1551/1552 or VAS 5051/5052, only one of 2 camshaft adjustment valves are activated in Output Diagnostic Test Mode (DTM) and is barely audible. Use mechanics stethoscope if necessary. Manufacturer does not give specification for testing camshaft adjustment valves, (camshaft adjustment valves are supplied power by fuse No. 15 and ground signal is supplied by ECM terminals No. 114 and 115).

1. Electrical Circuit Test - Verify battery voltage is a minimum of 11.5 volts and all fuses are okay. Repair as necessary. Turn ignition on, engine off. Using scan tool, activate camshaft adjustment valve. Camshaft adjustment valve should audibly click. If valve clicks. Go to next step, (only one of 2 valves have been tested). If valve does not click, go to next step.
2. Disconnect camshaft adjustment valve 2-pin harness connector from No. 1 camshaft adjustment valve (N205). (Scheme 39) Using adapter cables from Test Kit (VAG 1594), connect Voltage Tester (VAG 1527) to No. 1 camshaft adjustment valve 2-pin harness connector. Using scan tool, activate camshaft adjustment valve. Observe voltage tester LED. Voltage tester LED should blink (light to dark). Record results. Connect Voltage Tester (VAG 1527) to No. 2 camshaft adjustment valve 2-pin harness connector. Observe voltage tester LED. Voltage tester LED should blink (light to dark). Record results. If voltage tester LED did not blink for either No. 1 or No. 2 camshaft adjustment valves, go to next step. If voltage tester LED blinks, using scan tool, stop actuation of camshaft adjustment valve. Turn ignition off. Replace faulty camshaft adjustment valve. After repairs, erase DTC memory. Verify repair. Test is complete.
3. Turn ignition off. Disconnect ECM harness connector. Connect Test Box (VAG 1598/31) to ECM harness connector. See «CONNECTING VAG TEST BOX»(ref-160798-S19411562162004030100000). Using DVOM, measure resistance between No. 1 camshaft adjustment valve harness connector terminal No. 2 and test box socket No. 114. Record resistance reading. Using DVOM, measure resistance between No. 2 camshaft adjustment valve harness connector terminal No. 2 and test box socket No. 115. see scheme 40 Record resistance reading. Resistance should be a maximum of 1.5 ohms for each reading. On camshaft adjustment valves No. 1 and 2, check camshaft adjustment valve harness connector terminal No. 2 for short circuit to battery positive and ground. If readings are okay, go to next step. If readings are not okay, repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete.
4. Using DVOM, on camshaft adjustment valves No. 1 and 2, check resistance between camshaft adjustment valve harness connector terminal No. 1 and fuel pump relay. Record resistance readings. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Resistance should be a maximum of 1.5 ohms for each reading. If resistance is not okay, repair as necessary. Verify repair. Test is complete. If resistance is okay and all wiring is okay. Replace faulty ECM. See ENGINE CONTROL MODULE under REMOVAL, OVERHAUL & INSTALLATION. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000). NOTE: An aftermarket scan tool may not be able to perform mechanical test procedure properly. Manufacturer recommends using VAG 1551/1552 or VAS 5051/5052.
5. Mechanical Test - To check function of camshaft adjustment. Connect Scan Tool (VAG 1551/1552 or VAS 5051/5052). See «DATA LINK CONNECTOR»(ref-160798-S03646741422004030100000). Start engine and bring to operating temperature. Go to next step.
6. Check intake camshaft allocation (camshaft location in degrees). Display group 208 on scan tool display. For specifications (Scheme 40) If test is okay, go to next step. If test is not okay. Check valve timing, see ENGINE MECHANICAL article, under ENGINE. Repair as necessary. Verify repair. Go to next step.
7. Check exhaust camshaft allocation (camshaft location in degrees). Display group 209 on scan tool display. For specifications (Scheme 41) If test is okay, go to next step. If test is not okay. Check valve timing. See ENGINE MECHANICAL article, under ENGINE. Repair as necessary. Verify repair. Go to next step.
8. Check idle position of intake camshaft. Display group 210 on scan tool display. For specifications (Scheme 42) If test is okay, go to next step. If test is not okay. Check Camshaft Position (CMP) sensor connectors for proper location, (they may have been swapped). (Scheme 18) Check oil pressure. See appropriate ENGINE article. Repair as necessary. If oil pressure is okay and a malfunction is detected, check camshaft adjuster See ENGINE article. Repair as necessary. Verify repair. Go to next step.
9. Check idle position of exhaust camshaft. Display group 211 on scan tool display. For specifications (Scheme 43) If test is okay, go to next step. If test is not okay. Check Camshaft Position (CMP) sensor connectors for proper location, (they may have been swapped). (Scheme 18) Check oil pressure. See ENGINE article. Repair as necessary. If oil pressure is okay and a malfunction is detected, check camshaft adjuster. See ENGINE article. Repair as necessary. Verify repair. Go to next step.
10. Check partial throttle position of intake camshaft. Display group 210 on scan tool display. For specifications (Scheme 44) If test is okay, go to next step. If test is not okay. Check Camshaft Position (CMP) sensor connectors for proper location, (they may have been swapped). (Scheme 18) Check oil pressure. See appropriate article in ENGINE. Repair as necessary. If oil pressure is okay and a malfunction is detected, check camshaft adjuster. See appropriate article in ENGINE. Repair as necessary. Verify repair. Go to next step.
11. Check partial throttle position of exhaust camshaft. Display group 211 on scan tool display. For specifications (Scheme 45) If test is okay, go to next step. If test is not okay. Check Camshaft Position (CMP) sensor connectors for proper location, (they may have been swapped). (Scheme 18) Check oil pressure. See ENGINE article. Repair as necessary. If oil pressure is okay and a malfunction is detected, check camshaft adjuster. See ENGINE article. Repair as necessary. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See «TEST DRIVE RELEARN PROCEDURE»(ref-160798-S02926260952004030100000).

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45