Engine Controls - Tests W/codes - 2.0L Non-Turbo: Other Mitsubishi Eclipse II

Hard Failures

Hard failures cause MIL to come on and remain on until failure is repaired. If MIL comes on and remains on (MIL may flash) during vehicle operation, cause of failure may be determined by using DTCs. See DIAGNOSTIC TROUBLE CODES (DTCS) . If a sensor fails, PCM will use a substitute value in its calculations to continue engine operation. In this condition (limp-in mode), vehicle is functional, but loss of good driveability may result.

Intermittent Failures

Intermittent failures may cause MIL to flicker or come on and go out after intermittent DTC goes away. However, corresponding DTC will be retained in PCM memory. If related DTC does not reoccur within a certain time frame, related DTC will be erased from PCM memory. Intermittent failures may be caused by a sensor, connector or wiring problems. See INTERMITTENTS in TESTS W/O CODES - 2.0L NON-TURBO article.

SERVICE PRECAUTIONS

Before proceeding with diagnosis, following precautions must be observed

1. Ensure vehicle has a fully charged battery and functional charging system.
2. Visually inspect connectors and circuit wiring being worked on.
3. DO NOT disconnect battery or PCM. This will erase any DTCs stored in PCM.
4. DO NOT cause short circuits when performing electrical tests. This will set additional DTCs, making diagnosis of original problem more difficult.
5. DO NOT use a test light in place of a voltmeter.
6. When checking for spark, ensure coil wire is NOT more than 1/4" from chassis ground. If coil wire is more than 1/4" from chassis ground, damage to vehicle electronics and/or PCM may result.
7. DO NOT prolong testing of fuel injectors. Engine may hydrostatically (liquid) lock.
8. When a vehicle has multiple DTCs, always repair lowest number DTC first.

Using MIL

1. Before entering on-board diagnostics, see «SERVICE PRECAUTIONS»(ref-19159-S32139926002001010800000) . Turn ignition on, off, on, off and on within 5 seconds. Record 2-digit DTCs as displayed by flashing MIL. Go to next step.
2. A constant repetition of short flashes indicates system is normal. If system is abnormal, signals will appear on MIL as long and short flashes. Long flashes represent tens; short flashes represent ones. For example, 4 long flashes and 3 short flashes indicate DTC 43. After recording DTCs, proceed to «DIAGNOSTIC TROUBLE CODES (DTCS)»(ref-19159-S00789719072001010800000) .

Note. Although other scan tools are available, manufacturers recommend using a proprietary scan tool to retrieve DTCs. Chrysler Corp. and Eagle recommend using Chrysler's Diagnostic Readout Box III (DRB III) scan tool. Mitsubishi recommends using Multi-Use Tester II (MUT II) scan tool.

CLEARING DTCS

To clear DTCs using a scan tool, refer to owners manual supplied with scan tool. If scan tool is not available, DTCs may also be cleared by disconnecting negative battery cable or PCM for at least 15 seconds, allowing PCM to clear DTCs. Reconnect negative battery cable and check for DTCs to confirm repair.

DTCS

Note. DTCs listed below are retrieved using Multi-Use Tester II(MUT II) scan tool. To translate MUT II DTCs to generic scan tool DTCs or MIL DTCs, see DTCS table.

DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTCS

INTERMITTENT DTCS

This procedure applies if you have been sent here from diagnostic tests and have just attempted to simulate the condition that initially set the DTC. The following additional checks may assist in identifying a possible intermittent problem

1. Visually inspect related wiring harness connectors for broken, bent pushed out or corroded terminals.
2. Visually inspect related wiring harness for chafed, pierced or partially broken wires.
3. Check all pertinent technical service bulletins.

No Communication With All Systems

Check voltage between DLC terminal No. 16 and ground. If battery voltage does not exist, check junction connectors and wiring harness between DLC and power supply. If battery voltage exists, check continuity between DLC terminal No. 4 and ground and between terminal No. 5 and ground. If continuity exists, replace scan tool. If continuity does not exist, check wiring harness between DLC and ground.

No Communication With PCM

1. Check junction connectors and wiring harness between PCM and DLC. If wiring and connectors are okay, disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 2 (Black/Red wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check MFI relay connector and wiring harness between MFI relay connector and PCM.
2. Check continuity between PCM connector terminal No. 12 (Black wire) and ground. If continuity exists, go to next step. If continuity does not exist on any circuit, check wiring harness between PCM and ground.
3. Check voltage between PCM connector terminal No. 14 (Black/White wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check wiring harness between PCM and battery.

MIL Does Not Come On

1. Using scan tool, perform SENSOR READ TEST No. 10 (battery voltage). If battery voltage does not exist, go to step 3). If battery voltage exists, turn ignition off. Disconnect PCM connector. Connect jumper wire between PCM connector terminal No. 36 (Green/Red wire) and ground.
2. Turn ignition on. If MIL comes on, check PCM connector. If PCM connector is okay, replace PCM. If MIL does not come on, check for open bulb. If bulb is okay, go to step 6).
3. Disconnect PCM connector. Turn ignition on. Check voltage between PCM terminal No. 2 (Black/Red wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check MFI relay connector and wiring harness between MFI relay connector and PCM.
4. Check continuity between PCM connector terminal No. 12 (Black wire) and ground. If continuity exists, go to next step. If continuity does not exist on any circuit, check wiring harness between PCM and ground.
5. Check voltage between PCM connector terminal No. 14 (Black/White wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check wiring harness between PCM and battery.
6. Disconnect instrument panel connector C06. See «INSTRUMENT PANEL»(ref-26428) article in ACCESSORIES & EQUIPMENT section. Turn ignition on. Check voltage between instrument panel connector C06 terminal No. 10 (Black/White wire) and ground. If battery voltage exists, check junction connectors and wiring harness between instrument panel connector and PCM. If battery voltage does not exist, check power supply circuit to check engine light.

MIL Stays On

1. Using scan tool, check for stored DTCs. See «ENTERING ON-BOARD DIAGNOSTICS»(ref-19159-S24290310612001010800000) under SELF-DIAGNOSTIC SYSTEM. If no DTCs are displayed, go to next step. If DTCs are displayed, record all DTCs and go to appropriate tests.
2. Disconnect PCM connector. Disconnect instrument panel connector C04. See «INSTRUMENT PANEL»(ref-26428) article in ACCESSORIES & EQUIPMENT section. Check continuity between instrument panel connector C04 terminal No. 51 (Green/Red wire) and ground. If continuity exists, check wiring harness between instrument panel connector and PCM. If continuity does not exist, replace PCM.

Automatic Transaxle

1. Using scan tool, perform SENSOR READ TEST No. 65 (VSS). Test drive vehicle. If vehicle speed is not displayed on scan tool, go to next step. If vehicle speed is displayed on scan tool, replace PCM.
2. Check PCM connector, TCM connector and wiring harness between PCM and TCM. If wiring and connectors are okay, repair transaxle control system as necessary.

Manual Transaxle

1. Disconnect VSS connector. Turn ignition on. Check voltage between VSS connector terminal No. 1 (Yellow wire) and ground. If voltage is not 8.5-9.5 volts, go to step 3). If voltage is as specified, go to next step.
2. Check continuity between VSS connector terminal No. 2 (Black/Green wire) and ground. If continuity exists, go to step 3). If continuity does not exist, check PCM connector, junction connectors and wiring harness between PCM and VSS connector.
3. Check VSS connector, PCM connector, junction connector and wiring harness between PCM and VSS connector. If wiring and connectors are okay, using scan tool, perform SENSOR READ TEST No. 65 (VSS). Test drive vehicle. If vehicle speed is not displayed on scan tool, replace VSS.

SUMMARY

If no hard DTCs (or only pass DTCs) are present, driveability symptoms exist, or intermittent DTCs exist, proceed to TESTS W/O CODES - 2.0L NON-TURBO article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

Wiring Diagram (Eclipse 2.0L Non-Turbo - 1 Of 3). Scheme 43

Wiring Diagram (Eclipse 2.0L Non-Turbo - 2 Of 3). Scheme 44

Wiring Diagram (Eclipse 2.0L Non-Turbo - 3 Of 3). Scheme 45