Step | Action | Values | Yes | No |
---|---|---|---|---|
Caution: When working on the engine ignition system, use only electrically insulated pliers when handling ignition wires with the engine running. The ignition system produces high voltage while the engine is running and could cause serious personal injury if not handled properly. Notice: Refer to Nylon Fuel Lines Notice in the Preface section. | ||||
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | |
2 | Crank the engine. Does the engine start and continue to run? | -- | System OK | Go to Step 3 |
3 | Perform a cylinder compression test. Is the cylinder compression for all of the cylinders at or above the value specified? | 689 kPa (100 psi) | Go to Step 7 | Go to Step 4 |
4 | Inspect the timing belt alignment. Refer to Timing Belt Inspection in Engine Mechanical-2.0L. Is the timing belt in alignment. | -- | Go to Step 6 | Go to Step 5 |
5 | Align or replace the timing belt as needed. Is the repair complete? | -- | Go to Step 2 | -- |
6 | Repair the internal engine damage as needed. Is the repair complete? | -- | Go to Step 2 | -- |
7 | Inspect the fuel pump fuse. Is the problem found? | -- | Go to Step 8 | Go to Step 9 |
8 | Replace the fuse. Is the repair complete? | -- | Go to Step 2 | -- |
9 | Crank the engine and inspect the ignition wires for spark. Is spark present from all of the ignition wires? | -- | Go to Step 34 | Go to Step 10 |
10 |
Is spark present from all of the ignition wires? | 30,000 ohms | Go to Step 2 | Go to Step 11 |
11 |
Does the voltage measure near the value specified? | 1.08 V | Go to Step 12 | Go to Step 13 |
12 | Measure the voltage between the CKP sensor connector terminals 1 and 3. Does the voltage measure near the value specified? | 1.08 V | Go to Step 19 | Go to Step 14 |
13 | Measure the voltage between the CKP sensor connector terminal 2 and ground. Does the voltage measure near the value specified? | 1.08 V | Go to Step 15 | Go to Step 16 |
14 | Measure the voltage between the CKP sensor connector terminal 1 and ground. Does the voltage measure near the value specified? | 1.08 V | Go to Step 15 | Go to Step 17 |
15 | Inspect for an open or short in the wire between the CKP sensor connector terminal 3 and ground. Is the problem found? | -- | Go to Step 18 | Go to Step 33 |
16 | Inspect for an open or short in the wire between the CKP sensor connector terminal 2 and the ECM connector terminal A16. Is the problem found? | -- | Go to Step 18 | Go to Step 33 |
17 | Inspect for an open or short in the wire between the CKP sensor connector terminal 1 and the ECM connector terminal B14. Is the problem found? | -- | Go to Step 18 | Go to Step 33 |
18 | Repair the wiring as needed. Is the repair complete? | -- | Go to Step 2 | -- |
19 |
Are the voltage readings near the values specified? | 1.08 V with ignition ON 1.2 V during cranking | Go to Step 20 | Go to Step 21 |
20 | Measure the voltage at the ECM connector terminal B14 by backprobing the ECM connector. Are the voltage readings near the values specified? | 1.08 V with ignition ON 1.2 V during cranking | Go to Step 22 | Go to Step 21 |
21 | Replace the crankshaft position (CKP) sensor. Refer to Crankshaft Position Sensor Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
22 |
Is the test light ON? | -- | Go to Step 23 | Go to Step 24 |
23 | Connect a test light between terminal C of the EI system ignition coil connector and battery positive. Is the test light ON? | -- | Go to Step 27 | Go to Step 26 |
24 | Inspect for an open in the wiring between the battery and the EI system ignition coil connector terminal D. Is the problem found? | -- | Go to Step 26 | |
25 | Inspect for an open in the wire from the EI system ignition coil connector terminal C to ground. Is the problem found? | -- | Go to Step 26 | -- |
26 |
Is spark present from all of the ignition wires? | -- | Go to Step 2 | Go to Step 27 |
27 |
Does the voltage fluctuate within the values specified? | 0.2-2 V | Go to Step 28 | Go to Step 29 |
28 | While cranking the engine, measure the voltage at the EI system ignition coil connector terminal A. Does the voltage fluctuate within the values specified? | 0.2-2 V | Go to Step 32 | Go to Step 30 |
29 | Inspect for an open in the wire from the EI system ignition coil connector terminals B to the ECM connector terminal C14. Is the problem found? | -- | Go to Step 31 | Go to Step 33 |
30 | Inspect for an open in the wire from the EI system ignition coil connector terminal A to the ECM connector terminal D14. Is the problem found? | -- | Go to Step 31 | Go to Step 33 |
31 |
Is spark present from all of the ignition wires? | -- | Go to Step 2 | Go to Step 32 |
32 | Replace the EI system ignition coil. Refer to Ignition Coil Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
33 | Replace the ECM. Refer to Engine Control Module Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
34 |
Is any fuel pressure present? | -- | Go to Step 37 | Go to Step 35 |
35 |
Is the test light ON? | 2 seconds | Go to Step 36 | Go to Step 46 |
36 | Replace the fuel pump. Refer to Fuel Pump Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
37 | Is the fuel pressure within the value specified? | 379-393 kPa (55-57 psi) | Go to Step 41 | Go to Step 38 |
38 |
Is the problem found? | -- | Go to Step 39 | Go to Step 40 |
39 |
Is the fuel pressure within the value specified? | 379-393 kPa (55-57 psi) | Go to Step 2 | Go to Step 40 |
40 |
Is any fuel present? | -- | Go to Step 43 | Go to Step 44 |
41 | Inspect the fuel for contamination. Is the fuel contaminated? | -- | Go to Step 42 | Go to Step 58 |
42 |
Is the repair complete? | -- | Go to Step 2 | -- |
43 | Replace the fuel pressure regulator. Refer to Fuel Pressure Regulator Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
44 |
Is the problem found? | -- | Go to Step 45 | Go to Step 36 |
45 | Replace the fuel pump sender, the in-tank fuel filter, and/or the fuel coupling hoses as needed. Is the repair complete? | -- | Go to Step 2 | -- |
46 |
Is the test light ON? | 2 seconds | Go to Step 47 | Go to Step 48 |
47 | Repair the open wire between the fuel pump connector terminal 2 and ground. Is the repair complete? | -- | Go to Step 2 | -- |
48 |
Is the test light ON? | -- | Go to Step 49 | Go to Step 54 |
49 |
Is the test light ON? | 2 seconds | Go to Step 50 | Go to Step 55 |
50 |
Is the test light ON? | -- | Go to Step 51 | Go to Step 57 |
51 |
Is the problem found? | -- | Go to Step 52 | Go to Step 53 |
52 | Repair the wire between the fuel pump relay connector terminal 87 and the fuel pump connector terminal 3. Is the repair complete? | -- | Go to Step 2 | -- |
53 | Replace the fuel pump relay. Refer to Relay Replacement in Wiring Systems. Is the repair complete? | -- | Go to Step 2 | -- |
54 |
Is the problem found? | -- | Go to Step 65 | |
55 | Inspect the wire between the fuel pump relay connector terminal 85 to the ECM connector terminal A12 for an open. Is the problem found? | -- | Go to Step 56 | Go to Step 33 |
56 | Repair the wire between the fuel pump relay connector terminal 85 to the ECM connector terminal A12. Is the repair complete? | -- | Go to Step 2 | -- |
57 | Repair the wire between the fuel pump relay connector terminal 30 and the battery. Is the repair complete? | -- | Go to Step 2 | -- |
58 |
Is the test light ON at all of the fuel injectors? | -- | Go to Step 59 | Go to Step 62 |
59 |
Does the test light flash for all of the fuel injectors? | -- | Go to Step 60 | Go to Step 63 |
60 |
Important: The resistance will increase slightly at higher temperatures. Measure the resistance of each fuel injector. Is the resistance within the value specified? | 11.8-12.6 ohms | System OK | Go to Step 61 |
61 | Replace any of the fuel injectors with a resistance out of specification. Refer to Fuel Injection Fuel Rail Assembly Replacement . Is the repair complete? | -- | Go to Step 2 | -- |
62 | Repair the open wires between the fuel injector harness connectors terminal 1 and the battery. Is the repair complete? | -- | Go to Step 2 | -- |
63 |
Is the problem found? | -- | Go to Step 64 | Go to Step 66 |
64 | Repair the open fuel injector harness wires. Is the repair complete? | -- | Go to Step 2 | -- |
65 | Replace the fuse or repair the wiring as needed. Is the repair complete? | -- | Go to Step 2 | -- |
66 |
Is the problem found? | -- | Go to Step 65 |
The numbers below refer to the step numbers on the diagnostic table.
The On-Board Diagnostic (EOBD) System Check prompts the technician to complete some basic checks and store the Freeze Frame and Failure Records data on the scan tool, if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference.
By performing a compression test, it can be determined if the engine has the mechanical ability to run.
It is important to test for the presence of spark from all of the ignition wires. If spark is present from 1-3 of the ignition coil terminals, the crankshaft position (CKP) sensor is OK.
In testing the engine control module (ECM) outputs for the electronic spark timing signal, it is recommended to use an oscilloscope to view the varying voltage signals. In measuring these outputs with a voltmeter, intermittent errors may occur that cannot be seen by a voltmeter.
This step tests for proper operation of the ECM's control of the fuel pump circuit.
This step tests for a ground signal being supplied by the ECM to operate the fuel injectors. If there is no ground present during the cranking of the engine, and the fuel injector wiring is OK, the ECM is at fault.
Step | Action | Values | Yes | No |
---|---|---|---|---|
Caution: When working on the engine ignition system, use only electrically insulated pliers when handling ignition wires with the engine running. The ignition system produces high voltage while the engine is running and could cause serious personal injury if not handled properly. Notice: Refer to Nylon Fuel Lines Notice in the Preface section. | ||||
Perform an On-Board Diagnostic (EOBD) System Check. Was the check performed? | -- | Go to Step 2 | ||
Check for a set DTC P0601. Is the DTC set? | -- | Go to Step 4 | ||
Crank the engine. Does the engine start and continue to run? | -- | System OK | Go to Step 5 | |
4 | Perform a cylinder compression test. Is the cylinder compression for all of the cylinders at or above the specified value? | 689 kPa (100 psi) | Go to Step 8 | Go to Step 5 |
5 | Inspect the timing belt alignment. Refer to Timing Belt Inspection in Engine Mechanical-2.0L. Is the timing belt in alignment? | -- | Go to Step 7 | Go to Step 6 |
6 | Align or replace the timing belt as needed. Is the repair complete? | -- | Go to Step 3 | -- |
7 | Repair the internal engine damage as needed. Is the repair complete? | -- | Go to Step 3 | -- |
8 | Inspect the fuel pump fuse. Is the problem found? | -- | Go to Step 9 | Go to Step 10 |
9 | Replace the fuse. Is the repair complete? | -- | Go to Step 3 | -- |
10 |
Does the throttle position (TP) sensor read less than the specified value? | 1 V | Go to Step 11 | Go to DTC P0123 |
11 | Compare the engine coolant temperature (ECT) with the intake air temperature (IAT). Is the ECT relatively close to the IAT? | -- | Go to Step 12 | Go to DTC P0118 |
12 |
Does the MAP sensor read above the specified value and then change while cranking the engine? | 4 V | Go to Step 13 | Go to Step 14 |
13 | Crank the engine. Does the crankshaft position (CKP) active counter increment while cranking? | -- | Go to Step 16 | Go to Step 18 |
14 | Inspect the scan tool data for serial data. Was serial data lost while cranking the engine? | -- | Go to Step 15 | |
15 | Repair voltage loss to the engine control module (ECM) from the ignition switch. Is the repair complete? | -- | System OK | -- |
16 | Test for the presence of spark from all of the ignition wires while cranking the engine. Is spark present from all of the ignition wires? | -- | Go to Step 41 | Go to Step 17 |
17 |
Is spark present from all of the ignition wires? | 30,000 ohms | Go to Step 3 | Go to Step 18 |
18 |
Does the voltage measure near the value specified? | 1.4 V (2.5 V)* | Go to Step 19 | Go to Step 20 |
Measure the voltage between the CKP connector terminals 2 and 3. Does the voltage measure near the specified value? | 1.4 V (2.5 V)* | Go to Step 26 | Go to Step 21 | |
20 | Measure the voltage between the CKP connector terminals 1 and ground. Does the voltage measure near the specified value? | 1.4 V (2.5 V)* | Go to Step 22 | Go to Step 23 |
21 | Measure the voltage between the CKP connector terminals 2 and ground. Does the voltage measure near the specified value? | 1.4 V (2.5 V)* | Go to Step 22 | Go to Step 24 |
22 | Inspect for an open or short in the wire between the CKP connector terminal 3 and ground. Is the problem found? | -- | Go to Step 25 | Go to Step 40 |
23 | Inspect for an open or short in the wire between the CKP connector terminal 1 and the ECM connector terminal M21. Is the problem found? | -- | Go to Step 25 | Go to Step 40 |
24 | Inspect for an open or short in the wire between the CKP connector terminal 2 and the ECM connector terminal M5. Is the problem found? | -- | Go to Step 25 | Go to Step 40 |
25 | Repair the wiring as needed. Is the repair complete? | -- | Go to Step 3 | -- |
26 |
Are the voltage readings near the specified values? | 1.4 V (2.5 V)* with the ignition ON 1.6 V (2.6 V)* during cranking | Go to Step 27 | Go to Step 28 |
27 | Measure the voltage at the ECM connector terminal M5 by backprobing the ECM connector. Are the voltage readings near the specified values? | 1.4 V (2.5 V)* with the ignition ON 1.6 V (2.6 V)* during cranking | Go to Step 29 | Go to Step 28 |
28 | Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement . Is the repair complete? | -- | Go to Step 3 | -- |
29 |
Is the test light ON? | -- | Go to Step 30 | Go to Step 31 |
30 | Connect a test light to the EI system ignition coil connector and battery positive Is the test light ON? | -- | Go to Step 34 | Go to Step 32 |
31 | Inspect for an open in the wiring between the ignition switch and the EI system ignition coil connector terminal A Is the problem found? | -- | Go to Step 33 | -- |
32 | Inspect for an open in the wire from the EI system ignition coil to ground. Is the problem found? | -- | Go to Step 2 | -- |
33 |
Is spark present from all of the ignition wires? | -- | Go to Step 3 | Go to Step 34 |
34 |
Does the voltage fluctuate within the specified values? | 0.2-2 V | Go to Step 39 | Go to Step 37 |
While cranking the engine, measure the voltage at the EI system ignition coil connector terminal A. Does the voltage fluctuate within the specified values? | 0.2-2 V | Go to Step 39 | Go to Step 37 | |
36 | Inspect for an open in the wire from the EI system ignition coil connector terminal C to the ECM connector terminal M51. Is the problem found? | -- | Go to Step 38 | Go to Step 40 |
37 | Inspect for an open in the wire from the EI system ignition coil connector terminal A to the ECM connector terminal M1. Is the problem found? | -- | Go to Step 38 | Go to Step 40 |
38 |
Is spark present from all of the ignition wires? | -- | Go to Step 3 | Go to Step 39 |
39 | Replace the EI system ignition coil Refer to Ignition Coil Replacement . Is the repair complete? | -- | Go to Step 3 | -- |
40 |
Is the repair complete? | -- | Go to Step 3 | -- |
41 |
Is any fuel pressure present? | -- | Go to Step 44 | Go to Step 42 |
42 |
Is the test light ON? | 2 seconds | Go to Step 43 | Go to Step 53 |
43 | Replace the fuel pump. Refer to Fuel Pump Replacement . Is the repair complete? | -- | Go to Step 3 | -- |
44 | Is the fuel pressure within the value specified? | 379-393 kPa (55-57 psi) | Go to Step 48 | Go to Step 45 |
45 |
Is the problem found? | -- | Go to Step 46 | Go to Step 47 |
46 | Replace the restricted components. Is the repair complete? | -- | Go to Step 3 | Go to Step 47 |
47 |
Is any fuel present? | -- | Go to Step 50 | Go to Step 51 |
48 | Inspect the fuel for contamination. Is the fuel contaminated? | -- | Go to Step 49 | Go to Step 65 |
49 |
Is the repair complete? | - | Go to Step 3 | -- |
50 | Replace the fuel pressure regulator. Refer to Fuel Pressure Regulator Replacement . Is the repair complete? | -- | Go to Step 3 | -- |
51 |
Is the problem found? | -- | Go to Step 52 | Go to Step 43 |
52 | Replace the fuel pump sender, the in-tank fuel filter, and/or the fuel coupling hoses as needed. Is the repair complete? | -- | Go to Step 3 | -- |
53 |
Is the test light ON? | 2 seconds | Go to Step 54 | Go to Step 55 |
54 | Repair the open wire between the fuel pump connector terminal 2 and ground. Is the repair complete? | -- | Go to Step 3 | -- |
55 |
Is the test light ON? | 2 seconds | Go to Step 56 | Go to Step 62 |
56 |
Is the test light ON? | 2 seconds | Go to Step 57 | Go to Step 61 |
57 |
Is the test light ON? | -- | Go to Step 58 | Go to Step 64 |
58 |
Is the condition found? | -- | Go to Step 2 | Go to Step 59 |
Replace the fuel cutoff switch. Is the problem found? | -- | Go to Step 3 | Go to Step 60 | |
60 | Replace the fuel pump relay. Refer to Relay Replacement in Wiring Systems. Is the repair complete? | -- | Go to Step 3 | -- |
61 | Inspect for an open in the wiring between the fuel pump relay connector terminal 85 and ground. Is the problem found? | -- | Go to Step 72 | -- |
62 | Inspect the wire between the fuel pump relay connector terminal 86 to the ECM connector terminal K54 for an open. Is the problem found? | -- | Go to Step 63 | Go to Step 40 |
63 | Repair the wire between the fuel pump relay connector terminal 86 to the ECM connector terminal K54 for an open. Is the repair complete? | -- | Go to Step 3 | -- |
64 | Repair the wire between the fuel pump relay connector terminal 30 and the positive battery. Is the repair complete? | -- | Go to Step 3 | -- |
65 |
Is the test light ON at all of the fuel injectors? | -- | Go to Step 66 | Go to Step 69 |
66 |
Does the test light flash for all of the fuel injectors? | -- | Go to Step 67 | Go to Step 70 |
67 |
Important: The resistance will increase slightly at higher temperatures. Measure the resistance of each fuel injector. Is the resistance within the specified value? | 11.6-12.4 ohms | System OK | Go to Step 68 |
68 | Replace any of the fuel injectors with a resistance out of specification. Refer to Fuel Injection Fuel Rail Assembly Replacement . Is the repair complete? | -- | Go to Step 3 | -- |
69 | Repair the open wires between the fuel injector harness connectors terminal 1 and the engine harness C205 terminal 2. Is the repair complete? | -- | Go to Step 3 | -- |
70 |
Is the problem found? | -- | Go to Step 71 | Go to Step 73 |
71 | Repair the open fuel injector harness wires. Is the repair complete? | -- | Go to Step 3 | -- |
72 | Replace the fuse or repair the wiring as needed. Is the repair complete? | -- | Go to Step 3 | -- |
73 |
Is the problem found? | -- | Go to Step 72 | -- |