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Home/Mitsubishi/Eclipse/Mitsubishi Eclipse II (1994-1999)/Repair manual/Testing & Diagnostics/Engine Controls - Tests W/codes - 2.0L Non-Turbo: Diagnosis
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Engine Controls - Tests W/codes - 2.0L Non-Turbo: Diagnosis Mitsubishi Eclipse II

Testing & Diagnostics ~12204 words

SYSTEM DIAGNOSIS

Note. PCM diagnostic memory is retained by direct power supply from battery. Memory is not erased by turning off ignition, but it will be erased if battery or PCM is disconnected.

System diagnosis can be accomplished using a scan tool on all models. The Malfunction Indicator Light (MIL) can also be used. See ENTERING ON-BOARD DIAGNOSTICS . Powertrain Control Module (PCM) monitors several different engine control system circuits. If an abnormal input signal occurs, a Diagnostic Trouble Code (DTC) is stored in PCM memory and assigned a DTC number. Each circuit has its own DTC number and message. A specific DTC indicates a particular system failure, but does not indicate that cause of failure is necessarily within system.

A DTC does not condemn any specific component; it simply points out a probable malfunctioning area. If a DTC is set, PCM will turn on MIL. System failures encountered are identified as either hard failures or intermittent failures as determined by PCM.

VISUAL INSPECTION

Most driveability problems in the engine control system result from faulty wiring, poor electrical connections or leaking air and vacuum hose connections. To avoid unnecessary component testing, perform a visual inspection before beginning self-diagnostic tests.

ENTERING ON-BOARD DIAGNOSTICS

Note. DO NOT skip any steps in self-diagnostic tests or incorrect diagnosis may result. Ensure self-diagnostic test applies to vehicle being tested.

DTCs may be retrieved using Malfunction Indicator Light (MIL) or a scan tool. Proceed to appropriate DTC retrieval method.

Using Scan Tool

  1. Refer to manufacturer's operation manual for instructions in use of scan tool. Before entering on-board diagnostics, see «SERVICE PRECAUTIONS»(ref-19159-S32139926002001010800000) . Locate Data Link Connector (DLC) under instrument panel, near steering column.
  2. Turn ignition switch to OFF position. Connect scan tool to DLC. Turn ignition switch to ON position. Read and record scan tool self-diagnostic output. Proceed to «DIAGNOSTIC TROUBLE CODES (DTCS)»(ref-19159-S00789719072001010800000) .

DIAGNOSTIC TROUBLE CODES (DTCS)

When DTC is obtained, identify in DIAGNOSTIC TROUBLE CODE (DTC) INDEX table and refer to appropriate test in this article.

DIAGNOSTIC TESTS

CAUTIONEnsure ignition switch is in OFF position when performing resistance tests.

Note. PCM diagnostic memory is retained by direct power supply from battery. Memory is not erased by turning off ignition, but it will be erased if battery or PCM is disconnected.

Note. Perform all resistance and voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm impedance, unless stated otherwise in test procedures.

Note. For wire color identification at PCM terminals, see appropriate pin voltage chart in PIN VOLTAGE CHARTS - 2.0L NON-TURBO article.

Using scan tool or MIL, display and record Diagnostic Trouble Codes (DTCs). See ENTERING ON-BOARD DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM. If no DTCs are displayed, see the TESTS W/O CODES - 2.0L NON-TURBO article.

Clear DTCs. See CLEARING DTCS under SELF-DIAGNOSTIC SYSTEM. Road test vehicle (if necessary) and attempt to duplicate conditions that caused original complaint. Recheck for DTCs. If no DTCs are displayed, go to INTERMITTENT DTCS . If one or more DTCs are displayed, repair DTCs in order starting with lowest numbered DTC. Clear DTCs after each repair. Recheck for DTCs to confirm repair.

Tests are numbered using Multi-Use Tester II (MUT II) scan tool DTCs. To translate MUT II DTCs to generic scan tool or MIL DTCs, see DTCS table under DTCs in this article.

DTC 01 - NO CAMSHAFT POSITION (CMP) SENSOR SIGNAL AT PCM

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check Camshaft Position (CMP) sensor installation. If CMP sensor is properly installed, go to next step. If CMP sensor is not properly installed, repair as necessary.
  2. Disconnect CMP sensor connector. Turn ignition on. Check voltage between CMP sensor connector terminal No. 1 (Yellow wire) and ground. If voltage is 8.5-9.5 volts, go to next step. If voltage is not as specified, go to step 5).
  3. Check voltage between CMP sensor connector terminal No. 3 (Blue/Red wire) and ground. If voltage is 4.8-5.2 volts, go to next step. If voltage is not as specified, go to step 5).
  4. Check continuity between CMP sensor connector terminal No. 2 (Black/Green wire) and ground. If continuity does not exist, go to next step. If continuity exists, go to step 6).
  5. Check PCM connector, junction connectors and wiring harness between CMP sensor and PCM. If wiring and connectors are okay, replace PCM.
  6. Check CMP sensor connector. If CMP sensor connector is okay, replace CMP sensor. If CMP sensor connector is not okay, repair as necessary. Clear DTCs. Road test vehicle to verify repairs. If DTC 01 resets, replace PCM.

DTC 02 - INTERNAL POWERTRAIN CONTROL MODULE (PCM) FAILURE

An internal fault has been detected in PCM. There is no repair; replace PCM.

DTC 05 - CHARGING SYSTEM VOLTAGE TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check generator drive belt. If generator drive belt is okay, go to next step. If generator drive belt is not okay, adjust or replace as necessary.
  2. Check voltage between generator terminal "B" and battery positive terminal. Start engine and run at 1600 RPM. Turn headlight high beam on. If voltage is less than .5 volt, go to step 4). If voltage is more than .5 volt, go to next step.
  3. Check wiring and connectors between generator terminal "B" and battery positive terminal. Repair wiring and/or connectors as necessary.
  4. Check voltage between generator housing and battery negative terminal. Start engine and run at 1600 RPM. Turn headlight high beam on. If voltage is less than .5 volt, go to next step. If voltage is more than .5 volt, repair generator ground circuit.
  5. Disconnect field coil connector. Connect DVOM between field coil connector terminal No. 1 (Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  6. If battery voltage exists when MFI relay is on, check wiring between PCM and field coil connector. If wiring is okay, go to next step. If battery voltage does not exist when MFI relay is on, repair wiring between MFI relay and field coil connector.
  7. Using scan tool, perform SENSOR READ TEST No. 10 (battery voltage). If voltage indicated on scan tool and actual battery voltage are the same, repair or replace generator.
  8. If voltage indicated on scan tool and actual battery voltage are not the same, repair wiring harness between PCM and battery or PCM and ignition switch. Clear DTCs. Road test vehicle to verify repairs. If DTC 05 resets, replace PCM.

DTC 06 - CHARGING SYSTEM VOLTAGE TOO HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 36 (charging system goal). If voltage is less than 13 volts, replace PCM. If voltage is more than 13 volts go to next step.
  2. Perform scan tool SENSOR READ TEST No. 10 (battery voltage). If voltage indicated on scan tool and actual battery voltage are the same, go to next step. If voltage indicated on scan tool and actual battery voltage are not the same, check wiring harness between PCM and battery, PCM and ignition switch, and PCM and ground. Repair wiring as necessary.
  3. Disconnect generator field coil connector. Check continuity between generator terminal No. 2 and generator housing. If continuity exists, repair or replace generator. If continuity does not exist, go to next step.
  4. Check PCM connector, wiring harness and junction connector between generator and PCM. If wiring and connectors are okay, replace PCM.

DTC 10 - MFI RELAY CONTROL CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove MFI relay. Check resistance between relay terminals No. 4 and 6. Resistance should be 35-75 ohms. Connect 12-volt power source between relay terminals No. 4 and 6. Connect positive lead to terminal No. 6. With relay energized, continuity should exist between terminals No. 2 and 8. With power source removed, continuity should not exist. Replace MFI relay if any measurements are not as specified.
  2. Turn ignition on. Check voltage between MFI relay connector terminal No. 8 (Red/Black wire) and ground. If battery voltage exists, check PCM connector and wiring harness between MFI relay connector and PCM. If wiring and connector are okay, replace PCM. If battery voltage does not exist, check wiring harness and junction connectors between MFI relay connector and battery.

DTC 11 - GENERATOR FIELD NOT SWITCHING PROPERLY

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect generator field coil connector. Check continuity between generator terminal No. 2 and generator housing. If continuity exists, repair or replace generator. If continuity does not exist, go to next step.
  3. Check PCM connector, wiring harness and junction connector between generator and PCM. If wiring and connectors are okay, replace PCM.

DTC 16 - A/C CLUTCH RELAY CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove A/C clutch relay. Check continuity between relay terminals No. 1 and 3. Connect 12-volt power source between relay terminals No. 1 and 3. Connect positive lead to terminal No. 1.
  2. With relay energized, continuity should exist between terminals No. 4 and 5. With power source removed, continuity should not exist. If A/C clutch relay is okay, go to next step. Replace relay if continuity is not as specified.
  3. Disconnect PCM connector. Turn ignition on. Turn A/C switch on. Check voltage between PCM connector terminal No. 19 (Green wire) and ground. If battery voltage does not exist, go to step 5).
  4. If battery voltage exists, connect jumper wire between PCM connector terminal No. 59 (Green/Black wire) and ground. If A/C compressor clutch is turned on, go to next step. If A/C compressor clutch is not turned on, repair A/C system as necessary.
  5. Check PCM connector, wiring harness and junction connector between A/C clutch relay and PCM. If wiring and connectors are okay, replace PCM.

DTC 17 - EGR SOLENOID CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect EGR transducer solenoid connector. Check resistance between solenoid terminals. If resistance is 25-35 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace EGR transducer solenoid.
  2. Turn ignition on. Check voltage between solenoid connector terminal No. 2 (Black/White wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring harness and junction connectors between solenoid connector and ignition switch.
  3. Reconnect EGR transducer solenoid connector. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 39 (Red/Blue wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check solenoid connector and wiring harness between PCM and EGR solenoid.

DTC 18 - EVAPORATIVE (EVAP) SOLENOID CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect evaporative purge solenoid connector. Check resistance across solenoid valve terminals. If resistance is 25-35 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace evaporative purge solenoid.
  2. Turn ignition on. Check voltage between solenoid connector terminal No. 1 (Black/White wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring harness and junction connectors between ignition switch and solenoid connector.
  3. Reconnect evaporative purge solenoid connector. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 56 (Light Green/Black wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check solenoid connector and wiring harness between PCM and EGR solenoid.

DTC 19 - INJECTOR NO. 3 CONTROL CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect injector harness connector. Check resistance between injector terminals. If resistance is 11-15 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace injector.
  3. Connect DVOM between injector connector terminal No. 2 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  4. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and injector connector.
  5. Reconnect injector connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 43 (Yellow/Green wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  6. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check injector connector, junction connector and wiring harness between PCM and injector connector.

DTC 20 - INJECTOR NO. 2 CONTROL CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect injector harness connector. Check resistance between injector terminals. If resistance is 11-15 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace injector.
  3. Connect DVOM between injector connector terminal No. 2 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  4. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and injector connector.
  5. Reconnect injector connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 23 (Yellow/Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  6. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check injector connector, junction connector and wiring harness between PCM and injector connector.

DTC 21 - INJECTOR NO. 1 CONTROL CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect injector harness connector. Check resistance between injector terminals. If resistance is 11-15 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace injector.
  3. Connect DVOM between injector connector terminal No. 2 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  4. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and injector connector.
  5. Reconnect injector connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 44 (Light Green/Black wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). MFI relay is cycled on and off every 1.4 seconds.
  6. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check injector connector, junction connector and wiring harness between PCM and injector connector.

DTC 25 - IDLE AIR CONTROL (IAC) MOTOR CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect IAC motor connector. Check resistance between IAC motor connector terminals No. 1 and 4 and between terminals No. 2 and 3. If resistance is 38-52 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace IAC motor.
  2. Check IAC motor connector, PCM connector and wiring harness between PCM and IAC motor. If wiring and connectors are okay, replace PCM.

DTC 26 - THROTTLE POSITION (TP) SENSOR VOLTAGE LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect TP sensor connector. Check resistance between TP sensor connector terminals No. 1 and 3. Resistance should be 3500-6500 ohms at 68°F (20°C). Check resistance between TP sensor connector terminals No. 2 and 3, while slowly moving throttle from idle to full open position. If as specified and changes smoothly in proportion go throttle movement, go to next step. If resistance is not as specified or does not change smoothly in proportion to throttle valve movement, replace TP sensor.
  2. Turn ignition on. Check voltage between TP sensor connector terminal No. 3 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to next step. If voltage is not as specified, check PCM connector, junction connector and wiring harness between PCM and TP sensor.
  3. Check TP sensor connector, PCM connector, junction connector and wiring harness between PCM and TP sensor. If wiring and connectors are okay, replace PCM.

DTC 27 - THROTTLE POSITION (TP) SENSOR VOLTAGE HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect TP sensor connector. Check resistance between TP sensor connector terminals No. 1 and 3. Resistance should be 3500-6500 ohms at 68°F (20°C). Check resistance between TP sensor connector terminals No. 2 and 3, while slowly moving throttle from idle to full open position. If resistance is as specified and changes smoothly in proportion to throttle movement, go to next step. If resistance is not as specified or does not change smoothly in proportion to throttle movement, replace TP sensor.
  2. Check continuity between TP sensor connector terminal No. 1 (Black/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and TP sensor.
  3. Check TP sensor connector, PCM connector, junction connector and wiring harness between PCM and TP sensor. If wiring and connectors are okay, replace PCM.

DTC 30 - ECT SENSOR VOLTAGE TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect ECT sensor connector. Check resistance between ECT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  2. Check ECT sensor connector, PCM connector and wiring harness between PCM and ECT sensor connector. If wiring and connectors are okay, replace PCM.

DTC 31 - ECT SENSOR VOLTAGE TOO HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect ECT sensor connector. Check resistance between sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  2. Check continuity between ECT sensor connector terminal No. 1 (Black/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and ECT sensor connector.
  3. Check ECT sensor connector, PCM connector and wiring harness between PCM and ECT. If wiring and connectors are okay, replace PCM.

DTC 32 - UPSTREAM HO2S STAYS AT CENTER

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect upstream HO2S connector. Check continuity between upstream HO2S terminals No. 3 and 4. If continuity exists, go to next step. If continuity does not exist, replace upstream HO2S.
  2. Start and warm engine until engine coolant temperature is 176°F (80°C) or more. Connect jumper wires from battery positive to upstream HO2S terminal No. 3 and from battery negative to terminal No. 4. Connect DVOM between upstream HO2S terminals No. 1and 2.
  3. Monitor upstream HO2S output voltage while repeatedly racing engine. If voltage is 600-1000 millivolts, go to next step. If voltage is not as specified, replace upstream HO2S.
  4. Check upstream HO2S connector, PCM connector and wiring harness between PCM and upstream HO2S. If wiring and connectors are okay, replace PCM.

DTC 33 - ENGINE IS COLD TOO LONG

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove thermostat. Check that valve closes fully at room temperature. Place thermostat in container of hot water. Raise water temperature and check that thermostat begins to open at 195°F (90.5°F) and is full open at 216°F (102°C). Valve lift is .31" (8 mm) from full closed to full open. If thermostat is within specification, go to next step. Replace thermostat if not within specification.
  2. Disconnect Engine Coolant Temperature (ECT) sensor connector. Check resistance between ECT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  3. Check PCM connector, ECT sensor connector, junction connector, and wiring harness between PCM and ECT sensor. If wiring and connectors are okay, replace PCM.

DTC 35 - NO VEHICLE SPEED SENSOR (VSS) SIGNAL

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

DTC 36 - MAP SENSOR VOLTAGE TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect MAP sensor connector. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to next step. If voltage is not as specified, check PCM connector, junction connector and wiring harness between PCM and MAP sensor connector.
  2. Check MAP sensor connector, PCM connector, junction connector and wiring harness between PCM and MAP sensor connector. If wiring and connectors are okay, replace MAP sensor.

DTC 37 - MAP SENSOR VOLTAGE TOO HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect MAP sensor connector. Check continuity between MAP sensor connector terminal No. 1 (Black/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and MAP sensor connector.
  2. Check MAP sensor connector, PCM connector and wiring harness between PCM and MAP sensor connector. If wiring and connectors are okay, replace MAP sensor.

DTC 39 - NO CHANGE IN MAP FROM START TO RUN

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect MAP sensor connector. Check continuity between MAP sensor connector terminal No. 1 (Black/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and MAP sensor connector.
  2. Check MAP sensor connector, PCM connector and wiring harness between PCM and MAP sensor connector. If wiring and connectors are okay, replace MAP sensor.

DTC 40 - NO CKP SENSOR REFERENCE SIGNAL AT PCM

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check CKP sensor installation. If CKP sensor is properly installed, go to next step. If CKP sensor is not properly installed, repair as necessary.
  2. Disconnect CKP sensor connector. Turn ignition on. Check voltage between CKP sensor connector terminal No. 1 (Yellow wire) and ground. If voltage is 8.5-9.5 volts, go to next step. If voltage is not as specified, go to step 5).
  3. Check voltage between CKP sensor connector terminal No. 3 (Blue/White wire) and ground. If voltage is 4.8-5.2 volts, go to next step. If voltage is not as specified, go to step 5).
  4. Check continuity between CKP sensor connector terminal No. 2 (Black/Green wire) and ground. If continuity does not exist, go to next step. If continuity exists, go to step 6).
  5. Check PCM connector, junction connectors and wiring harness between CKP sensor and PCM. If wiring and connectors are okay, replace PCM.
  6. Check CKP sensor connector. If CKP sensor connector is okay, replace CKP sensor. If CKP sensor connector is not okay, repair as necessary. Clear DTCs. Road test vehicle to verify repairs. If DTC 40 resets, replace PCM.

DTC 42 - IGNITION COIL NO. 2 PRIMARY CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect ignition coil connector. Connect DVOM between ignition coil connector terminal No. 2 (Black/Red wire) and ground. Go to next step. NOTE: MFI relay is cycled on and off every 1.4 seconds.
  3. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and ignition coil connector.
  4. Reconnect ignition coil connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 41 (Brown wire) and ground. Go to next step.
  5. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay).If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check ignition coil connector and wiring harness between PCM and injector connector.

DTC 43 - IGNITION COIL NO. 1 PRIMARY CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect ignition coil connector. Connect DVOM between ignition coil connector terminal No. 2 (Black/Red wire) and ground. Go to next step. NOTE: MFI relay is cycled on and off every 1.4 seconds.
  3. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and ignition coil connector.
  4. Reconnect ignition coil connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 21 (Black/Blue wire) and ground. Go to next step.
  5. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay).If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check ignition coil connector and wiring harness between PCM and injector connector.

DTC 44 - NO MFI RELAY OUTPUT VOLTAGE AT PCM

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove MFI relay. Check resistance between relay terminals No. 4 and 6. Resistance should be 35-75 ohms. Connect 12-volt power source between relay terminals No. 4 and 6. Connect positive lead to terminal No. 6. With relay energized, continuity should exist between terminals No. 2 and 8. With power source removed, continuity should not exist. Replace MFI relay if any measurements are not as specified.
  2. Turn ignition on. Check voltage between MFI relay connector terminal No. 8 (Red/Black wire) and ground. Check voltage between MFI relay connector terminal No. 5 (Black/White wire) and ground. Go to next step.
  3. If battery voltage exists, check PCM connector, MFI relay connector, junction connector and wiring harness between PCM and MFI relay connector. If wiring and connectors are okay, replace PCM. If battery voltage does not exist, check wiring harness and junction connectors between MFI relay connector and battery.

DTC 46 - EXHAUST GAS RECIRCULATION (EGR) SYSTEM FAILURE

  1. Start and warm engine to normal operating temperature. Remove and plug vacuum hose from EGR valve nipple. Connect hand vacuum pump to EGR valve nipple. Apply 3.5 in. Hg of vacuum to EGR valve. If idle becomes rough or engine stalls, go to step 3). If idle does not change, go to next step.
  2. Check EGR valve and tube for obstructions. Clean or replace valve and/or tube as necessary.
  3. Check EGR vacuum hose for damage and proper routing. If vacuum hose is okay, check EGR solenoid circuit. See «DTC 17 - EGR SOLENOID CIRCUIT FAILURE»(ref-19159-S04241172152001010800000) .

DTC 48 - PCM FAILURE SRI MILES NOT STORED

An unsuccessful attempt to update Service Reminder Indicator (SRI) mileage in PCM EEPROM has been detected. There is no repair; replace PCM.

DTC 49 - PCM FAILURE EEPROM WRITE DENIED

An unsuccessful attempt to write to an EEPROM location by PCM has been detected. There is no repair; replace PCM.

DTC 57 - INTAKE AIR TEMPERATURE (IAT) SENSOR VOLTAGE LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect IAT sensor connector. Check resistance between IAT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  2. Check IAT sensor connector, PCM connector and wiring harness between PCM and IAT sensor connector. If wiring and connectors are okay, replace PCM.

DTC 58 - INTAKE AIR TEMPERATURE (IAT) SENSOR VOLTAGE HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect IAT sensor connector. Check resistance between IAT terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace IAT sensor.
  2. Check continuity between IAT sensor connector terminal No. 1 (Black Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and IAT sensor connector.
  3. Check IAT sensor connector, PCM connector and wiring harness between PCM and IAT sensor connector. If wiring and connectors are okay, replace PCM.

DTC 59 - KNOCK SENSOR (KS) NO. 1 CIRCUIT FAILURE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect KS connector. Check continuity between KS connector terminal No. 2 (Black/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector, junction connectors and wiring harness between PCM and KS connector.
  2. Check KS connector, PCM connector, junction connector and wiring harness between PCM and KS connector. If wiring and connectors are okay, replace KS. Clear DTCs. Road test vehicle to verify repairs. If DTC 59 resets, replace PCM.

DTC 61 - INJECTOR NO. 4 CONTROL CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If MFI relay operation can be heard, go to next step. If MFI relay operation cannot be heard, repair MFI relay circuit.
  2. Disconnect injector harness connector. Check resistance between injector terminals. If resistance is 11-15 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace injector. NOTE: MFI relay is cycled on and off every 1.4 seconds.
  3. Connect DVOM between injector connector terminal No. 2 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay).
  4. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and injector connector.
  5. Reconnect injector connector. Disconnect PCM connector. Connect DVOM between PCM connector terminal No. 24 (Light Green/Red wire) and ground.
  6. Using scan tool, perform ACTUATOR TEST No. 10 (MFI relay). If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check injector connector, junction connector and wiring harness between PCM and injector connector.

DTC 62 - UPSTREAM HO2S SHORTED TO VOLTAGE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect upstream HO2S connector. Check continuity between upstream HO2S terminals No. 3 and 4. If continuity exists, go to next step. If continuity does not exist, replace upstream HO2S.
  2. Start and warm engine until engine coolant temperature is 176°F (80°C) or more. Connect jumper wires from battery positive to upstream HO2S terminal No. 3 and from battery negative to terminal No. 4. Connect DVOM between upstream HO2S terminals No. 1and 2.
  3. Monitor upstream HO2S output voltage while repeatedly racing engine. If voltage is 600-1000 millivolts, go to next step. If voltage is not as specified, replace upstream HO2S.
  4. Check upstream HO2S connector, PCM connector and wiring harness between PCM and upstream HO2S. If wiring and connectors are okay, replace PCM.

DTC 68 - PCM FAULT SPI COMMUNICATIONS

No communications between co-processors in control module. There is no repair; replace PCM.

DTC 71 - BATTERY TEMPERATURE SENSOR VOLTAGE OUT OF LIMIT

Battery temperature sensor is built into PCM. There is no repair; replace PCM.

DTC 92 - LOW SPEED FAN CONTROL RELAY CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 59 (Green/Black wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check radiator fan relay circuit.
  2. Turn ignition off. Connect jumper wire between PCM connector terminal No. 59 (Green/Black wire) and ground. Turn ignition on. If radiator fan runs, check PCM connector. If PCM connector is okay, replace PCM. If radiator fan does not run, check radiator fan relay circuit.

DTC 93 - HIGH SPEED FAN CONTROL RELAY CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 17 (Green/Orange wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check radiator fan relay circuit.
  2. Turn ignition off. Connect jumper wire between PCM connector terminal No. 17 (Green/Orange wire) and ground. Turn ignition on. If radiator fan runs, check PCM connector. If PCM connector is okay, replace PCM. If radiator fan does not run, check radiator fan relay circuit.

DTC 96 - NO CCD MESSAGES FROM TRANSAXLE CONTROL MODULE (TCM)

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, attempt to establish communications with TCM. If scan tool communicates with TCM, check PCM connector. If PCM connector is okay, replace PCM. If scan tool does not communicate with TCM, turn ignition off. Disconnect PCM connector and attempt to establish communications with TCM again.
  2. If scan tool communicates with TCM, check PCM connector. If PCM connector is okay, replace PCM. If scan tool does not communicate with TCM, turn ignition off. Disconnect PCM connector. Turn ignition on. Check voltage between Data Link Connector (DLC) terminal No. 7 and ground and between terminal No. 8 and ground. Voltage should be 1.5-3.5 volts.
  3. Turn ignition off. Check resistance between DLC terminals No. 7 and 8. Resistance should be 110-130 ohms. If voltage and resistance are as specified, go to next step. If voltage or resistance is not as specified, check TCM connector and wiring harness between PCM and TCM. If wiring connector is okay, replace TCM.
  4. Connect PCM connector, disconnect TCM connector. Check resistance between DLC terminals No. 7 and 8. If resistance is 110-130 ohms, check PCM and TCM connectors. If connectors are okay, replace PCM. If DTC resets, replace TCM. If resistance is not as specified, check PCM connector. If PCM connector is okay, replace PCM.

DTC 101 - FUEL PUMP RELAY CONTROL CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove fuel pump relay. Check resistance between relay terminals No. 4 and 6. Resistance should be 35-75 ohms. Replace fuel pump relay if continuity is not as specified.
  2. Connect 12-volt power source between relay terminals No. 4 and 6. Connect positive lead to terminal No. 6. With relay energized, continuity should exist between terminals No. 2 and 8. With power source removed, continuity should not exist. Replace MFI relay if any measurements are not as specified.
  3. Turn ignition on. Check voltage between fuel pump relay connector terminal No. 6 (Black/White wire) and ground. If battery voltage exists, check PCM connector and wiring harness between fuel pump relay connector and PCM. If wiring connector is okay, replace PCM. If battery voltage does not exist, check wiring harness and junction connectors between fuel pump relay connector and ignition switch.

DTC 102 - UPSTREAM HEATED OXYGEN SENSOR (HO2S) RESPONSE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check exhaust system for damage or exhaust leaks. If exhaust system is okay, check upstream HO2S connector, PCM connector and wiring harness between upstream HO2S and PCM. If wiring and connectors are okay, replace upstream HO2S.

DTC 103 - UPSTREAM HEATED OXYGEN SENSOR (HO2S) HEATER FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Connect DVOM between upstream HO2S connector terminal No. 4 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST. No. 10 (MFI relay). NOTE: MFI relay is cycled on and off every 1.4 seconds.
  2. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and upstream HO2S connector.
  3. Check for continuity between upstream HO2S connector terminal No. 3 (Black wire) and ground. If continuity exists, check upstream HO2S connector. If upstream HO2S connector is okay, replace upstream HO2S. If continuity does not exist, check wiring harness between upstream HO2S and ground.

DTC 104 - DOWNSTREAM HO2S STAYS AT CENTER

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect downstream HO2S connector. Check continuity between downstream HO2S terminals No. 1 and 2. If continuity exists, go to next step. If continuity does not exist, replace downstream HO2S.
  2. Check downstream HO2S connector, PCM connector and wiring harness between downstream HO2S connector and PCM. If wiring and connectors are okay, replace PCM.

DTC 105 - DOWNSTREAM HEATED OXYGEN SENSOR (HO2S) HEATER FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Connect DVOM between downstream HO2S connector terminal No. 4 (Black/Red wire) and ground. Using scan tool, perform ACTUATOR TEST. No. 10 (MFI relay). NOTE: MFI relay is cycled on and off every 1.4 seconds.
  2. If battery voltage exists when MFI relay is on, go to next step. If battery voltage does not exist when MFI relay is on, check wiring harness and junction connectors between MFI relay and downstream HO2S connector.
  3. Check for continuity between downstream HO2S connector terminal No. 3 (Black wire) and ground. If continuity exists, check downstream HO2S connector. If downstream HO2S connector is okay, replace downstream HO2S. If continuity does not exist, check wiring harness between downstream HO2S and ground.

DTC 106 - MULTIPLE CYLINDER MISFIRE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 05 (engine coolant temperature). If temperature displayed on scan tool is equal to actual engine coolant temperature, go to step 5). If temperature displayed on scan tool is not equal to actual coolant temperature, go to next step.
  2. Disconnect Engine Coolant Temperature (ECT) sensor connector. Check resistance between ECT sensor terminals. Resistance range is 9000-11,000 ohms at 77 (25C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  3. Turn ignition on. Check voltage between ECT sensor connector terminal No. 2 (Green/White wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between ECT sensor connector terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check ECT sensor connector. If connector is okay, replace PCM.
  4. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and ECT sensor connector. If wiring and connectors are okay, replace PCM.
  5. Perform SENSOR READ TEST No. 27 (intake air temperature). If temperature display on scan tool is equal to actual air temperature, go to step 9). If temperature displayed on scan tool is not equal to actual air temperature, go to next step.
  6. Disconnect Intake Air Temperature (IAT) sensor connector. Check resistance between IAT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace IAT sensor.
  7. Turn ignition on, measure voltage between IAT sensor connector terminal No. 2 (Brown/Blue wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between IAT sensor connector terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check IAT sensor connector. If connector is okay, replace PCM.
  8. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and IAT sensor connector. If wiring and connectors are okay, replace PCM.
  9. Perform SENSOR READ TEST No. 11 (manifold absolute pressure reading). Manifold Absolute Pressure (MAP) sensor range is from 30 in. Hg (101 kPa) at 0 ft. (0 m) to 26 in. Hg (88 kPa) at 3937 ft. (1200 m). If scan tool reading is as specified, go to step 12). If scan tool reading is not as specified, go to next step.
  10. Turn ignition on. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between MAP sensor connector terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check MAP sensor connector and wiring harness between PCM and MAP sensor connector. If wiring connector is okay, replace MAP sensor.
  11. If voltage is not as specified or continuity does not exist, check PCM connector, junction connectors and wiring harness between PCM and MAP sensor connector. If wiring and harness connectors are okay, replace PCM.
  12. Perform SENSOR READ TEST No. 66 (upstream HO2S volts). Scan tool reading should alternate between 0-400 millivolts and 600-1000 millivolts, at idle. If voltage is as specified, go to step 14). If voltage is not as specified, go to next step.
  13. Check PCM connector, Crankshaft Position (CKP) sensor connector, junction connectors and wiring harness between CKP sensor and PCM. Check Camshaft Position (CMP) sensor installation. If problem still exists, and wiring, connectors and sensor are okay, check ignition coil, spark plug wires, EGR system and compression pressure. See «BASIC TESTING - 2.0L NON TURBO»(ref-19189) and «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) articles.
  14. Check fuel system pressure. See BASIC TESTING article. If fuel pressure is okay, and problem still exists, check fuel injectors for operation and leakage. Check PCV system, EGR and EVAP control systems. See «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) article.

DTC 107, 108, 109 OR 110 - CYLINDER NO. 1, 2, 3, OR 4 MISFIRE

Check spark plugs, spark plug wires, fuel injectors and compression pressure. See BASIC TESTING - 2.0L NON TURBO and SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO articles. Check head gasket and intake manifold gasket for damage.

DTC 112 - CATALYTIC CONVERTER EFFICIENCY FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check exhaust system for damage or exhaust leaks. If exhaust system is okay, replace catalytic converter. Clear DTCs. Road test vehicle to verify repairs. If DTC 112 resets, check HO2S connectors, PCM connector, and wiring harness between each HO2S and PCM. If wiring and connectors are okay, replace PCM.

DTC 113 - EVAPORATIVE (EVAP) PURGE MONITOR FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check for damaged, disconnected or misrouted vacuum hoses. Repair as necessary. See «VACUUM DIAGRAMS - 2.0L NON-TURBO»(ref-19190) article. If vacuum hoses are okay, check EVAP purge control system. Disconnect purge control solenoid vacuum hose from throttle body and connect hose to hand vacuum pump. Plug throttle body nipple. Start engine and apply 15.7 in. Hg of vacuum. If no vacuum exists, check throttle body purge port.
  2. Connect hand vacuum pump to throttle body nipple. Start engine and increase RPM. Vacuum should remain constant regardless of engine RPM. If no vacuum exists, check throttle body purge port.
  3. Label and disconnect both vacuum hoses from EVAP purge solenoid valve. Disconnect electrical connector. Connect hand vacuum pump to EVAP purge solenoid valve nipple where red-striped hose was connected. Apply vacuum to EVAP purge solenoid valve. Vacuum should hold.
  4. Apply battery voltage to EVAP purge solenoid valve terminals. Vacuum should bleed down when voltage is applied to terminals. Check resistance across EVAP purge solenoid valve terminals. Reading should be 36-44 ohms at 68°F (20°C). If reading is not as specified, replace EVAP purge solenoid valve.

DTC 114 - PARK NEUTRAL POSITION (PNP) SWITCH FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect PNP switch connector. With shift lever in Park or Neutral position, check continuity between PNP switch terminals No. 1 and 3. With shift lever in Reverse or Drive position, check continuity between PNP switch terminal No. 2 and ground. If continuity exists, go to next step. If continuity does not exist, replace PNP switch.
  2. Turn ignition on. Check voltage between PNP switch connector terminal No. 5 (Black/Yellow wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check PCM connector and wiring harness between PNP switch connector and PCM. If wiring and connectors are okay, replace PCM.
  3. Disconnect PCM connector. Turn ignition switch to START position. Check voltage between PNP switch connector terminal No. 5 (Black/Yellow wire) and ground. If battery voltage does not exist, go to next step. If battery voltage exists, check PNP switch connector. If PNP switch connector is okay, replace PCM.
  4. Check starter relay connector, ignition switch connector and wiring harness between PNP switch and ignition switch connector. If wiring and connectors are okay, disconnect ignition switch connector.
  5. With ignition switch in ACC position, check continuity between ignition switch connector terminals No. 1 and 6. With ignition switch in ON position, check continuity between terminals No. 1 and 2, 1 and 4,and 1 and 6. With ignition switch in START position, check continuity between terminals No. 1 and 2, 1 and 3, and 1 and 5. If continuity does not exist between specified terminals, replace ignition switch.

DTC 115 - POWER STEERING PRESSURE (PSP) SWITCH FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect PSP switch connector. Start engine, while turning steering wheel, check continuity between PSP switch terminal No. 1 and ground. If continuity exists, go to next step. If continuity does not exist, replace PSP switch.
  2. Check voltage between PSP switch connector terminal No. 1 (Blue/Yellow wire) and ground. If battery voltage exists, replace PCM. If battery voltage does not exist, replace PCM.

DTC 118 - FUEL SYSTEM RICH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 05 (engine coolant temperature). If temperature displayed on scan tool is equal to actual temperature, go to step 5). If temperature displayed is not equal to actual coolant temperature, go to next step.
  2. Disconnect Engine Coolant Temperature (ECT) sensor connector. Check resistance between ECT sensor terminals. Resistance range is between 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms. at 211°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  3. Turn ignition on. Check voltage between ECT sensor connector terminal No. 2 (Green/White wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check ECT sensor connector. If connector is okay, replace PCM.
  4. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and ECT sensor connector. If wiring and connectors are okay, replace PCM.
  5. Perform SENSOR READ TEST No. 27 (intake air temperature). If temperature displayed on scan tool is equal to actual temperature, go to step 9). If temperature displayed on scan tool is not equal to actual air temperature, go to next step.
  6. Disconnect Intake Air Temperature (IAT) sensor connector. Check resistance between IAT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100C°). If resistance is as specified, go to next step. If resistance is as specified, replace IAT sensor.
  7. Turn ignition on. Check voltage between IAT sensor connector terminal No. 2 (Brown/Blue wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check IAT sensor connector. If IAT sensor connector is okay, replace PCM.
  8. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and IAT sensor connector. If wiring and connectors are okay, replace PCM.
  9. Perform SENSOR READ TEST No. 11 (manifold absolute pressure reading). Manifold Absolute Pressure (MAP) sensor range is from 30 in. Hg (101 kPa) at 0 ft. (0 m) to 26 in. Hg (88 kPa) at 3937 ft. (1200 m). If scan tool reading is as specified, go to step 12). If scan tool reading is not as specified, go to next step.
  10. Turn ignition on. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check MAP sensor connector and wiring harness between PCM and MAP sensor connector. If wiring connector is okay, replace MAP sensor.
  11. If voltage is not as specified or continuity does not exist, check PCM connector, junction connectors and wiring harness between PCM and MAP sensor connector. If wiring and harness connectors are okay, replace PCM.
  12. Perform SENSOR READ TEST No. 63 (downstream HO2S volts). Drive vehicle in Second gear (M/T) or Low Range (A/T), and accelerate with wide open throttle to 3500 RPM or more. Scan tool reading should alternate between 0-400 millivolts and 600-1000 millivolts, at idle. If voltage is as specified, go to step 14). If voltage is not as specified, go to next step.
  13. Disconnect downstream HO2S connector. Check continuity between downstream HO2S terminals No. 1 and 3. If continuity does not exist, replace downstream HO2S. If continuity exists, but voltage is not as specified, replace downstream HO2S.
  14. Check continuity between downstream HO2S connector terminal No. 1 (White/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector and wiring harness between downstream HO2S connector and PCM.
  15. Check downstream HO2S connector and wiring harness between PCM and downstream HO2S connector. If wiring and connector are okay, replace PCM.
  16. Perform SENSOR READ TEST No. 02 (upstream HO2S volts). Scan tool reading should be 600-1000 millivolts, when racing engine. If voltage is not as specified, go to step 20). If voltage is as specified, go to next step.
  17. Disconnect upstream HO2S connector. Check continuity between upstream HO2S terminals No. 3 and 4. If continuity does not exist, replace upstream HO2S. If continuity exists, start and warm engine until engine coolant temperature is 176°F (80°C) or more. Connect jumper wires from battery positive to upstream HO2S terminal No. 3 and from battery negative to terminal No. 4 Connect DVOM between upstream HO2S terminal No. 1 and 2.
  18. Monitor upstream HO2S output voltage while repeatedly racing engine. If sensor voltage is not 600-1000 millivolts, replace upstream HO2S. If voltage is 600-1000 millivolts, check continuity between upstream HO2S connector terminal No. 1 (White/Black wire) and ground.
  19. If continuity exists, check upstream HO2S connector, and wiring harness between PCM and upstream HO2S connector. If wiring and connector is okay, replace PCM. If continuity does not exist, check PCM connector and wiring harness between PCM and upstream HO2S connector.
  20. Repeat SENSOR READ TEST No. 02 (upstream HO2S volts). Scan tool reading should alternate between 0-400 millivolts and 600-1000 millivolts, at idle. If upstream HO2S volts are not as specified, go to next step. If upstream HO2S volts are as specified, check fuel injectors for operation and leakage. Check EVAP control system. See «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) article.
  21. Check fuel system pressure. See «BASIC TESTING - 2.0L NON TURBO»(ref-19189) article. If fuel pressure is okay, and problem exists, check fuel injectors for operation and leakage. Check EVAP control system. See «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) article.

DTC 119 - FUEL SYSTEM LEAN

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 05 (engine coolant temperature). If temperature displayed on scan tool is equal to actual temperature, go to step 5). If temperature displayed is not equal to actual coolant temperature, go to next step.
  2. Disconnect Engine Coolant Temperature (ECT) sensor connector. Check resistance between ECT sensor terminals. Resistance range is between 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms. at 211°F (100°C). If is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  3. Turn ignition on. Check voltage between ECT sensor connector terminal No. 2 (Green/White wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check ECT sensor connector. If connector is okay, replace PCM.
  4. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and ECT sensor connector. If wiring and connectors are okay, replace PCM.
  5. Perform SENSOR READ TEST No. 27 (intake air temperature). If temperature displayed on scan tool is equal to actual temperature, go to step 9). If temperature displayed on scan tool is not equal to actual air temperature, go to next step.
  6. Disconnect Intake Air Temperature (IAT) sensor connector. Check resistance between IAT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is as specified, replace IAT sensor.
  7. Turn ignition on. Check voltage between IAT sensor connector terminal No. 2 (Brown/Blue wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check IAT sensor connector. If IAT sensor connector is okay, replace PCM.
  8. If voltage is not as specified or continuity does not exist, check PCM connector, junction connector and wiring harness between PCM and IAT sensor connector. If wiring and connectors are okay, replace PCM.
  9. Perform SENSOR READ TEST No. 11 (manifold absolute pressure reading). Manifold Absolute Pressure (MAP) sensor range is from 30 in. Hg (101 kPa) at 0 ft. (0 m) to 26 in. Hg (88 kPa) at 3937 ft. (1200 m). If scan tool reading is as specified, go to step 12). If scan tool reading is not as specified, go to next step.
  10. Turn ignition on. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. Voltage should be 4.7-5.2 volts. Check continuity between terminal No. 1 (Black/Green wire) and ground. If voltage is as specified and continuity exists, check MAP sensor connector and wiring harness between PCM and MAP sensor connector. If wiring harness and connector are okay, replace MAP sensor.
  11. If voltage is not as specified or continuity does not exist, check PCM connector, junction connectors and wiring harness between PCM and MAP sensor connector. If wiring and harness connectors are okay, replace PCM.
  12. Perform SENSOR READ TEST No. 63 (downstream HO2S volts). Drive vehicle in Second gear (M/T) or Low Range (A/T), and accelerate with wide open throttle to 3500 RPM or more. Scan tool reading should alternate between 0-400 millivolts and 600-1000 millivolts, at idle. If voltage is as specified, go to step 14). If voltage is not as specified, go to next step.
  13. Disconnect downstream HO2S connector. Check continuity between downstream HO2S terminals No. 1 and 3. If continuity does not exist, replace downstream HO2S. If continuity does exist, but voltage is not as specified, replace downstream HO2S.
  14. Check continuity between downstream HO2S connector terminal No. 1 (White/Green wire) and ground. If continuity exists, go to next step. If continuity does not exist, check PCM connector and wiring harness between downstream HO2S connector and PCM.
  15. Check downstream HO2S connector and wiring harness between PCM and downstream HO2S connector. If wiring and connector are okay, replace PCM.
  16. Perform SENSOR READ TEST No. 02 (upstream HO2S volts). Scan tool reading should be 600-1000 millivolts, when racing engine. If voltage is not as specified, go to step 20). If voltage is as specified, go to next step.
  17. Disconnect upstream HO2S connector. Check continuity between upstream HO2S terminals No. 3 and 4. If continuity does not exist, replace upstream HO2S. If continuity exists, start and warm engine until engine coolant temperature is 176°F (80°C) or more. Connect jumper wires from battery positive to upstream HO2S terminal No. 3 and from battery negative to terminal No. 4 Connect DVOM between upstream HO2S terminals No. 1 and 2.
  18. Connect DVOM between upstream HO2S terminals No. 1 and 2. Monitor upstream HO2S output voltage while repeatedly racing engine. If voltage is not 600-1000 millivolts, replace upstream HO2S. If voltage is as specified, check continuity between upstream HO2S connector terminal No. 1 (White/Black wire) and ground.
  19. If continuity exists, check upstream HO2S connector, and wiring harness between PCM and upstream HO2S connector. If wiring and connector are okay, replace PCM. If continuity does not exist, check PCM connector and wiring harness between PCM and upstream HO2S connector.
  20. Repeat SENSOR READ TEST No. 02 (upstream HO2S volts). Scan tool reading should alternate between 0-400 millivolts and 600-1000 millivolts, at idle. If voltage is not as specified, go to next step. If voltage is as specified, check fuel injectors for operation and leakage. Check EVAP control system. See «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) article.
  21. Check fuel system pressure. See «BASIC TESTING - 2.0L NON TURBO»(ref-19189) article. If fuel pressure is okay, and problem exists, check fuel injectors for operation and leakage. Check EVAP control system. See «SYSTEM/COMPONENT TESTS - 2.0L NON-TURBO»(ref-19158) article.

DTC 126 - DOWNSTREAM HO2S SHORTED TO VOLTAGE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect downstream HO2S connector. Check continuity between downstream HO2S terminals No. 1 and 2. If continuity exists, go to next step. If continuity does not exist, replace downstream HO2S.
  2. Check downstream HO2S connector, PCM connector and wiring harness between downstream HO2S connector and PCM. If wiring and connectors are okay, replace PCM.

DTC 128 - CLOSED LOOP TEMPERATURE NOT REACHED

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Remove thermostat. Check that valve closes fully at room temperature. Place thermostat in container of hot water. Raise water temperature, check that thermostat begins to open at 195°F (90.5°C) and is fully open at 216°F (102°C). Valve lift is .31" (8 mm) from full closed to full open. If thermostat operates as specified, go to next step. Replace thermostat if it does not operate as specified.
  2. Disconnect Engine Coolant Temperature (ECT) sensor connector. Check resistance between ECT sensor terminals. Resistance range is 9000-11,000 ohms at 77°F (25°C) to 600-800 ohms at 212°F (100°C). If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  3. Check PCM connector, ECT sensor connector, junction connector and wiring harness between PCM and ECT sensor. If wiring and connectors are okay, replace PCM.

DTC 132 - THROTTLE POSITION (TP) DOES NOT AGREE WITH MAP

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 07 (throttle position). With throttle at idle, reading should be 400 millivolts or more. With throttle wide open, reading should be 3800 millivolts or less. If voltage is not as specified, go to next step. If voltage is as specified, go to step 3).
  2. Check TP sensor system. See «DTC 26 - THROTTLE POSITION (TP) SENSOR VOLTAGE LOW»(ref-19159-S17091252152001010800000) and «DTC 27 - THROTTLE POSITION (TP) SENSOR VOLTAGE HIGH»(ref-19159-S22328274482001010800000) .
  3. Start and warm engine until engine coolant temperature is 176°F (80°C) or more. Connect vacuum gauge to intake manifold plenum. With engine at idle, perform scan tool SENSOR READ TEST No. 69 (manifold absolute pressure gauge reading). If scan tool and vacuum gauge reading are the same, replace PCM. If scan tool and vacuum gauge reading are not the same, go to next step.
  4. Check MAP sensor system. See «DTC 36 - MAP SENSOR VOLTAGE TOO LOW»(ref-19159-S28056079392001010800000) and «DTC 37 - MAP SENSOR VOLTAGE TOO HIGH»(ref-19159-S38360659972001010800000) .

DTC 133 - TIMING BELT SKIPPED 1 TOOTH OR MORE

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check Camshaft Position (CMP) sensor connector, Crankshaft Position (CKP) sensor connector and PCM connector. If connectors are okay, check CMP sensor and CKP sensor. See «DTC 01 - NO CAMSHAFT POSITION (CMP) SENSOR SIGNAL AT PCM»(ref-19159-S09542486052001010800000) and «DTC 40 - NO CKP SENSOR REFERENCE SIGNAL AT PCM»(ref-19159-S16281487162001010800000) . If sensors are okay, go to next step.
  2. Check valve timing and condition of timing belt. Correct timing or replace timing belt as necessary. If valve timing and timing belt are okay, use scan tool to synchronize CMP sensor with CKP sensor.

DTC 135 - NO 5 VOLTS TO MAP SENSOR

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect MAP sensor connector. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to step 3). If voltage is not as specified, go to next step.
  2. Check PCM connector, junction connector connector and wiring harness between PCM and junction connector. If wiring and connectors are okay, go to next step.
  3. Check MAP sensor connector, PCM connector and wiring harness between PCM and MAP sensor. If wiring and connectors are okay, replace MAP sensor.

DTC 136 - NO 5 VOLTS TO THROTTLE POSITION (TP) SENSOR

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check TP sensor system. See «DTC 26 - THROTTLE POSITION (TP) SENSOR VOLTAGE LOW»(ref-19159-S17091252152001010800000) and «DTC 27 - THROTTLE POSITION (TP) SENSOR VOLTAGE HIGH»(ref-19159-S22328274482001010800000) . If TP system is okay, to to next step.
  2. Disconnect TP sensor connector. Check voltage between TP sensor connector terminal No. 3 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to step 4). If voltage is not as specified, go to next step.
  3. Check PCM connector, junction connector connector and wiring harness between PCM and junction connector. If wiring and connectors are okay, go to next step.
  4. Check TP sensor connector, PCM connector and wiring harness between PCM and TP sensor. If wiring and connectors are okay, replace PCM.

DTC 137 - ELECTRONIC AUTOMATIC TRANSAXLE (EATX) DTC PRESENT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check PCM connector, TCM connector and wiring harness between PCM and TCM. If wiring and connectors are okay, check TCM.

DTC 138 - TARGET IDLE NOT REACHED

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using scan tool, perform SENSOR READ TEST No. 12 (idle air control position). If Idle Air Control (IAC) motor step value increases when A/C switch is turned on, perform throttle body minimum airflow check and go to step 3). If IAC motor step value does not increase, go to next step.
  2. Disconnect IAC motor connector. Check resistance between IAC motor terminals No. 1 and 4 and between No. 2 and 3. If resistance is not 38-52 ohms at 68°F (20°C), replace IAC motor. If resistance is as specified, check IAC motor control circuit. See «DTC 25 - IDLE AIR CONTROL (IAC) MOTOR CIRCUIT»(ref-19159-S15323391732001010800000) .
  3. Start and warm engine until engine coolant temperature is 176°F (80°C) or more. Turn engine off. Disconnect PCV valve hose from intake manifold. Connect Air Metering Fitting (MB995050) to intake manifold. Disconnect 3/16" idle purge line from throttle body. Cap throttle body nipple.
  4. Start engine and idle for at least 60 seconds with all accessories off. Using scan tool, access SENSOR READ TEST "MINIMUM AIRFLOW IDLE SPEED" screen. After test selection, IAC motor will close, idle air spark advance will be fixed and scan tool will display engine speed. Idle speed should be 600-1200 RPM.
  5. If idle speed is above specification, check IAC motor operation with scan tool. If IAC motor is okay, replace throttle body. If idle speed is below specification, remove and clean throttle body. Reinstall throttle body and repeat minimum airflow check.

DTC 139 - HIGH SPEED RADIATOR FAN CONTROL RELAY CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 69 (Green/Orange wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check radiator fan relay circuit.
  2. Turn ignition off. Connect jumper wire between PCM connector terminal No. 69 (Green/Orange wire) and ground. Turn ignition on. If radiator fan runs, check PCM connector. If PCM connector is okay, replace PCM. If radiator fan does not run, check radiator fan relay circuit.

DTC 146 - 5-VOLT SUPPLY OUTPUT TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect MAP sensor connector. Check voltage between MAP sensor connector terminal No. 2 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to step 3). If voltage is not as specified, go to next step.
  2. Check PCM connector, junction connector and wiring harness between PCM and junction connector. If wiring and connectors are okay, go to next step.
  3. Check MAP sensor connector, PCM connector and wiring harness between PCM and MAP sensor. If wiring and connectors are okay, go to next step.
  4. Disconnect TP sensor connector. Check voltage between TP sensor connector terminal No. 3 (Green/Yellow wire) and ground. If voltage is 4.8-5.2 volts, go to step 6). If voltage is not as specified, go to next step.
  5. Check PCM connector, junction connector and wiring harness between PCM and junction connector. If wiring and connectors are okay, go to next step.
  6. Check MAP sensor connector and TP sensor connector. If connectors are okay, replace PCM.

DTC 149 - FUEL LEVEL SENDING UNIT VOLTS TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check fuel gauge. See «INSTRUMENT PANEL»(ref-26428) article in ACCESSORIES & EQUIPMENT section. If fuel gauge is okay, go to next step.
  2. Check PCM connector, junction connectors, fuel gauge sending unit connector and wiring harness between PCM and fuel gauge sending unit. If wiring and connectors are okay, replace PCM.

DTC 150 - FUEL LEVEL SENDING UNIT VOLTS TOO HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check fuel gauge. See «INSTRUMENT PANEL»(ref-26428) article in ACCESSORIES & EQUIPMENT section. If fuel gauge is okay, go to next step.
  2. Check PCM connector, junction connectors, fuel gauge sending unit connector and wiring harness between PCM and fuel gauge sending unit. If wiring and connectors are okay, replace PCM.

DTC 151 - FUEL LEVEL SENDING UNIT NO CHANGE OVER MILES

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Check fuel gauge. See «INSTRUMENT PANEL»(ref-26428) article in ACCESSORIES & EQUIPMENT section. If fuel gauge is okay, go to next step.
  2. Check PCM connector, junction connectors, fuel gauge sending unit connector and wiring harness between PCM and fuel gauge sending unit. If wiring and connectors are okay, replace PCM.

DTC 153 - BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Battery temperature sensor is built into PCM. There is no repair; replace PCM.

DTC 154 - BATTERY TEMPERATURE SENSOR VOLTAGE TOO HIGH

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Battery temperature sensor is built into PCM. There is no repair; replace PCM.

DTC 155 - UPSTREAM HO2S SHORTED TO GROUND

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check wiring harness between PCM and upstream HO2S. If wiring is okay, replace PCM.

DTC 156 - DOWNSTREAM HO2S SHORTED TO GROUND

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check wiring harness between PCM and downstream HO2S. If wiring is okay, replace PCM.

DTC 157 - INTERMITTENT LOSS OF CMP OR CKP SIGNAL

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check Camshaft Position (CMP) sensor, Crankshaft Position (CKP) sensor connector and PCM connector. If connectors are okay, check CMP sensor and CKP sensor. See DTC 10 - MFI RELAY CONTROL CIRCUIT FAILURE and DTC 40 - NO CKP SENSOR REFERENCE SIGNAL AT PCM .

DTC 160 - EVAP LEAK MONITOR SMALL LEAK DETECTED

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Ensure fuel tank and purge lines are properly sealed. If fuel tank and purge lines are okay, go to next step.
  2. Check EVAP solenoid operation. See «DTC 18 - EVAPORATIVE (EVAP) SOLENOID CIRCUIT FAILURE»(ref-19159-S40296484452001010800000) . If EVAP solenoid is okay, replace PCM.

DTC 161 - EVAP LEAK MONITOR LARGE LEAK DETECTED

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Ensure fuel tank and purge lines are properly sealed. If fuel tank and purge lines are okay, go to next step.
  2. Check EVAP solenoid operation. See «DTC 18 - EVAPORATIVE (EVAP) SOLENOID CIRCUIT FAILURE»(ref-19159-S40296484452001010800000) . If EVAP solenoid is okay, replace PCM.

DTC 183 - EVAP EMISSION VENT SOLENOID CIRCUIT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect evaporative purge solenoid connector. Turn ignition on. Check voltage between solenoid connector terminal No. 2 (Black/White wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring harness and junction connectors between ignition switch and solenoid connector.
  2. Reconnect evaporative purge solenoid connector. Disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 77 (Red/Yellow wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check solenoid connector and wiring harness between PCM and EGR solenoid.

DTC 184 - EVAP EMISSION VENT SWITCH OR MECHANICAL FAULT

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check connectors and wiring harness between EVAP purge solenoid and PCM. If connectors and wiring are okay, replace PCM.

DTC 187 - EVAP LEAK MONITOR PINCHED HOSE FOUND

Note. For component terminal identification, see TERMINAL IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

Check for clogged hoses between EVAP vent solenoid and fuel tank. If hoses are okay, replace PCM.

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