Engine Controls - System & Component Testing: Other Kia Sephia II

ENGINE CONTROL MODULE (ECM)

1. Using a voltmeter, check for battery voltage at power terminals listed in table by application. Turn ignition on. Check for battery voltage at Ignition terminals. Turn ignition off. Using a voltmeter, check for battery voltage between power supply and ground terminals. See «ECM POWER & GROUND TERMINALS»(ref-3159-S16282174752000041800000) table. ECM POWER & GROUND TERMINALS Model (1) Terminals No. Sephia Power 26 Ignition 54, 58 Ground 6, 28, 34, 55 Sportage Power 26 Ignition 54, 58 Ground 6, 28, 34, 55 (1) (Scheme 37)
2. If battery voltage is not present, check appropriate fuses. On Sephia, check ECM B+ fuse (10-amp) in passenger compartment fuse box and INJ fuse (10-amp) and IGN COILS fuse (15-amp) in engine compartment fuse/relay box. On Sportage, check ECU fuse (10-amp) in passenger compartment fuse box and MAIN fuse (15-amp) and FUEL INJ fuse (30-amp) in engine compartment fuse/relay box. Replace fuse(s) as necessary and check for cause of blown fuse. If fuses are okay, check EGI main relay. See «RELAYS»(ref-3159-S21772167402000041800000) under RELAYS & SOLENOIDS. If relay is okay, locate and repair open between main relay and ECM connector.

Scheme 37

Sephia

1. Disconnect brake pedal switch 4-pin connector. Measure resistance between brake pedal switch terminals No. 1 and 4 (Pink/Black wire and Red/Black wire). With brake pedal released, there should be no continuity. With brake pedal depressed, there should be continuity.
2. Measure resistance between brake pedal switch terminals No. 2 and 3 (Blue wire and Brown/Red wire). With brake pedal released, there should be continuity. With brake pedal depressed, there should be no continuity. Replace switch as necessary.

Sportage

1. Disconnect brake pedal switch 4-pin connector. Measure resistance between brake pedal switch terminals No. 2 and 3 (Yellow wire and Orange wire). With brake pedal released, there should be no continuity. With brake pedal depressed, there should be continuity.
2. Measure resistance between brake pedal switch terminals No. 1 and 4 (Blue wire and Gray wire). With brake pedal released, there should be continuity. With brake pedal depressed, there should be no continuity. Replace switch as necessary.

CAMSHAFT POSITION SENSOR

Note. DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.

Connect lab scope positive probe to ECM connector terminal No. 44 (Blue/Red wire). (Scheme 37) Connect lab scope negative probe to ground. Set lab scope time to 50 milliseconds and voltage to 5 volts. Start engine and allow it to reach normal operating temperature. With engine at idle, compare CMP sensor waveform to normal CMP sensor waveform. (Scheme 38) If waveform is erratic, replace CMP sensor.

Scheme 38

Note. DO NOT use OBD-II DLC for lab scope power source as this will affect waveform.

Connect lab scope positive probe to ECM connector terminal No. 44 (White/Red wire). (Scheme 37) Connect lab scope negative probe to ground. Set lab scope time to 50 milliseconds and voltage to 5 volts. Start engine and allow it to reach normal operating temperature. With engine at idle, compare CMP sensor waveform to normal CMP sensor waveform. (Scheme 38) If waveform is erratic, replace CMP sensor.

CHASSIS ACCELERATION SENSOR (CAS)

On Sephia, CAS is located in right side of engine compartment, behind strut tower. On Sportage, CAS is located in right rear engine compartment, below starter. Turn ignition on. On Sephia, backprobe and measure voltage between CAS connector terminal No. 3 (Red/Black wire) and ground. On Sportage, backprobe and measure voltage between CAS connector terminal No. 3 (Blue/Green wire) and ground. Check for voltage spike (less than one volt) while tapping CAS bracket. If no voltage spike is observed, replace sensor.

CLUTCH PEDAL POSITION (CPP) SWITCH

Disconnect CPP switch connector. Check continuity between CCP switch terminals. With clutch pedal depressed, there should be continuity. With clutch pedal released, there should not be continuity. Replace CCP switch as necessary.

Note. DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source, as this will affect waveform.

Connect lab scope positive probe to ECM connector terminal No. 16 (White/Yellow wire). Connect lab scope negative probe to ECM connector terminal No. 43 (White/Green wire). (Scheme 37) Start engine and allow it to reach normal operating temperature. With engine at idle, observe CKP waveform. Compare to normal waveform. (Scheme 39) If CKP sensor waveform is erratic, replace CKP sensor.

Scheme 39

Note. DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.

Connect lab scope positive probe to ECM connector terminal No. 16 (Yellow/Green wire). (Scheme 37) Connect lab scope negative probe to ECM connector terminal No. 43 (Yellow/Blue wire). Start engine and allow it to reach normal operating temperature. With engine at idle, observe CKP waveform. Compare to normal waveform. (Scheme 39) If CKP sensor waveform is erratic, replace CKP sensor.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

Remove ECT sensor. Place sensor and thermometer in container of water. Measure resistance between ECT sensor terminals. Slowly heat water. Note resistance at specified temperatures. See ECT SENSOR RESISTANCE SPECIFICATIONS table. Replace ECT sensor as necessary.

ECT SENSOR RESISTANCE SPECIFICATIONS

1. Disconnect front or rear HO2S 4-pin connector. Measure resistance between front HO2S connector terminals No. 1 and 3 (Pink wire and Green/Black wire - component side) or rear HO2S connector terminals No. 1 and 3 (Pink wire and Green/Red wire - component side). (Scheme 40) HO2S heater resistance should be about 6 ohms at 68°F (20°C).
2. Connect HO2S connector. Start and run engine at normal operating temperature for at least 10 minutes. Using scan tool, lab scope or voltmeter, monitor appropriate HO2S signal. If using voltmeter or lab scope, connect positive lead to front HO2S connector terminal No. 4 (Green/Brown wire) or to rear HO2S connector terminal No. 4 (Green/White wire). Connect negative lead to ground. HO2S signal should switch from lean to rich, or rich to lean, at least 3 times every 10 seconds. Front HO2S signal should switch between 0-1 volt. Rear HO2S signal should switch between.6-.8 volt. If HO2S is not as specified, replace HO2S.

Scheme 40

1. Disconnect front or rear HO2S 4-pin connector. Measure resistance between front or rear HO2S connector terminals No. 1 and 3 (White wires - component side). (Scheme 40) HO2S heater resistance should be about 5 ohms at 68°F (20°C).
2. Connect HO2S connector. Start and run engine at normal operating temperature for at least 10 minutes. Using scan tool, lab scope or voltmeter, monitor appropriate HO2S signal. If using voltmeter or lab scope, connect positive lead to front HO2S connector terminal No. 4 (Yellow/White wire) or to rear HO2S connector terminal No. 4 (Blue wire). HO2S signal should switch from lean to rich, or rich to lean, at least 3 times every 10 seconds. Front HO2S signal should switch between.1-.9 volts. Rear signal should switch between.6-.7 volts. If HO2S is not as specified, replace HO2S.

INTAKE AIR TEMPERATURE (IAT) SENSOR

Note. Sephia IAT sensor component testing not available from manufacturer. For Sephia IAT sensor system testing, see TEST P0112: IAT CIRCUIT LOW INPUT or TEST P0113: IAT CIRCUIT HIGH INPUT in SELF-DIAGNOSTICS - SEPHIA article.

On Sportage, IAT sensor is located on air cleaner assembly. Disconnect IAT sensor 2-pin connector. Measure resistance between IAT sensor terminals. Resistance should be 2210-2690 ohms at 68°F (20°C). If resistance is not as specified, replace IAT sensor.

Remove knock sensor from engine. Mount knock sensor in jaws of bench vise. Connect voltmeter between knock sensor connector terminals No. 1 and 2 (Yellow/Blue wire and Yellow/Green wire). Using hammer, sharply rap on bench vise and check for voltage spike (less than one volt). If no voltage spike is observed, replace knock sensor.

Knock sensor is located on right side of engine, above oil filter. Turn ignition on. Backprobe and measure voltage between knock sensor connector terminal No. 1 (Yellow/Green wire) and ground. Tap engine crossmember bracket and check for voltage spike (less than one volt). If no voltage spike is observed, replace knock sensor.

MASS AIRFLOW (MAF) SENSOR

Warm up engine to normal operating temperature and let idle. On Sephia, backprobe and measure voltage between MAF sensor connector terminal No. 4 (Red/White wire) and ground. On Sportage, backprobe and measure voltage between MAF sensor connector terminal No. 4 (Red/Green wire) and ground. At idle, voltage should be .8-1.2 volts. When engine is accelerated, voltage should be 3.5-4.0 volts. If voltage is not as specified, replace MAF sensor.

Turn ignition off. Measure resistance between TP sensor connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side). With throttle fully closed, resistance should be 1.6-2.4 k/ohms. As throttle is opened, resistance should smoothly increase linearly to 4.1-4.3 k/ohms at wide open throttle. If resistances are not as specified, replace TP sensor.

1. Disconnect TP sensor 3-pin connector. Measure resistance between TP sensor connector terminals No. 2 and 3 (Yellow/Green wire and Yellow/Black wire - component side). Resistance should be about 2.4 k/ohms with throttle closed and about one ohm with throttle wide open. If resistances are not as specified, replace TP sensor. If resistances are as specified, go to next step.
2. Connect TP sensor connector. Turn ignition on. Backprobe and measure voltage between TP sensor connector terminals No. 2 and 3 (Yellow/Green wire and Yellow/Black wire). With throttle fully closed voltage should be about .5 volt. With throttle wide open, voltage should be about 4.1 volt. If voltages are not as specified, replace TP sensor.

TRANSMISSION RANGE SWITCH

Sephia transmission range switch is located on top left of transaxle. Sportage 2WD transmission range switch is located on right side of transmission. Sportage 4WD transmission range switch is located at left rear of transfer case.

Disconnect battery negative cable. Disconnect transmission range switch connector. Using ohmmeter, check continuity of transmission range sensor. See TRANSMISSION RANGE SWITCH table. If sensor does not test as specified, adjust or repair as needed.

TRANSMISSION RANGE SWITCH

Scheme 41

Scheme 42

VSS is mounted on transaxle. Raise and support vehicle. Block one drive wheel. Turn ignition on. Backprobe and measure voltage between VSS connector terminal No. 1 (Green/Orange wire - A/T) or No. 3 (Green/Orange wire - M/T) and ground while assistant spins free drive wheel. Voltage should toggle between 1-10 volts as wheel is rotated. If voltage does not toggle as specified, replace VSS.

1. On 2WD, VSS is mounted on right side of transmission. On 4WD, VSS is mounted at left rear (transfer case) side of transmission. Raise and support vehicle. Block one drive wheel.
2. Attach jumper wire between battery positive terminal and positive probe of Digital Volt-Ohmmeter (DVOM). Backprobe VSS connector terminal No. 1 (Blue/Black wire) with DVOM negative probe.
3. Turn ignition on. While assistant spins rear wheel, observe voltage. Voltage should toggle between 0-12 volts as wheel is rotated. If wheel does not change from 0-12 volts as wheel is turned, replace VSS.

RELAYS

Fuel pump and EGI main relays are located in engine compartment fuse/relay box. Remove relay. Check relay according to application.

EGI Main Relay (Sportage)

1. Check for continuity between relay terminal No. 1 and terminal No. 3. (Scheme 43) If continuity exists, go to next step. If continuity does not exist, replace relay.
2. Check for continuity between relay terminal No. 1 and terminal No. 2. If continuity exists, replace relay. If continuity does not exist, go to next step.
3. Connect a jumper wire between positive battery terminal and relay terminal No. 5. Connect another jumper wire between negative battery terminal and relay terminal No. 4.
4. Check continuity between relay terminal No. 1 and terminal No. 2. Continuity should exist. If continuity does not exist, replace relay.

Scheme 43

Fuel Pump (Sportage)

1. Check for continuity between relay terminal No. 2 and terminals No. 3 and 4. (Scheme 43) If continuity does not exist, go to next step. If continuity exists, replace relay.
2. Connect a jumper wire between positive battery terminal and relay terminal No. 5. Connect another jumper wire between negative battery terminal and relay terminal No. 1.
3. Check continuity between relay terminal No. 2 and terminals No. 3 and 4. Continuity should exist. If continuity does not exist, replace relay.

Fuel Pump & EGI Main Relay (Sephia)

1. Check for continuity between relay terminals No. 1 and 3. (Scheme 44) If continuity does not exist, go to next step. If continuity exists, replace relay.
2. Connect a jumper wire between positive battery terminal and relay terminal No. 2. Connect another jumper wire between negative battery terminal and relay terminal No. 4.
3. Check continuity between relay terminals No. 1 and 3. Continuity should exist. If continuity does not exist, replace relay.

Scheme 44

Canister Close Valve (CCV)

See FUEL EVAPORATION under EMISSION SYSTEMS & SUB-SYSTEMS.

Fuel Injectors

Using stethoscope, listen for normal clicking sound at each fuel injector during idle and acceleration. If clicking sound is not heard, check fuel injector wiring circuit, or EGI main relay and circuit.

Fuel Injector Resistance

Disconnect fuel injector connector. Using ohmmeter, measure resistance between fuel injector terminals. If resistance is not as specified, replace fuel injector. See INJECTOR RESISTANCE table.

INJECTOR RESISTANCE

Purge Control Solenoid Valve

See FUEL EVAPORATION under EMISSION SYSTEMS & SUB-SYSTEMS.

FUEL DELIVERY

Note. For fuel system pressure testing, see BASIC DIAGNOSTIC PROCEDURES article.

Fuel Pump Relay

See RELAYS under RELAYS & SOLENOIDS.

See SOLENOIDS under RELAYS & SOLENOIDS.

Injector Fuel Leakage

See FUEL INJECTOR VOLUME TEST under FUEL INJECTORS under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article.

IDLE AIR CONTROL (IAC) VALVE

Turn ignition off. Disconnect IAC 3-pin connector. Check resistance between terminals. See IDLE AIR CONTROL (IAC) VALVE RESISTANCES table. If resistances are not as specified, replace valve.

IDLE AIR CONTROL (IAC) VALVE RESISTANCES

IGNITION SYSTEM

Note. For basic ignition checks, see IGNITION CHECKS in BASIC DIAGNOSTIC PROCEDURES article. Timing and idle speed are controlled by Engine Control Module (ECM) and are not adjustable, but may be checked to see if control system is operating properly. For checking base timing and idle speed, see SERVICE & ADJUSTMENT SPECIFICATIONS article.

1. Measure resistance between CCV terminals. Resistance should be 24-25 ohms at 68° F (20° C). If resistance is not as specified, replace CCV.
2. Remove CCV. CCV should be open. Blow air into port "A" and verify air escapes from port "B". (Scheme 45) Close CCV by jumpering one CCV terminal to battery positive terminal. Jumper other CCV terminal to battery negative terminal. Blow air into port "A" and verify air does not escape from port "B". If air does not escape from port "B" when CCV is open and/or escapes when CCV is closed, replace CCV.

Scheme 45

Evaporative Emissions (EVAP) Canister

Check for loose, missing, cracked or broken connections and parts. Repair or replace as necessary. No liquid should exist in EVAP canister.

Check & Cut Valve (Sportage)

Located on frame near fuel tank. Testing information not available from manufacturer.

On-Board Refueling Vapor Recovery (Sephia)

Located on top of fuel tank. Testing information not available from manufacturer.

Purge Solenoid Valve (PSV)

1. Measure resistance between PSV connector terminals (component side). Resistance should be 24-28 ohms at 68°F (20°C). If resistance is not as specified, replace PSV.
2. Remove PSV. PSV should be closed. Blow air into port "A" and verify air does not escape from port "B". (Scheme 46) Open PSV by jumpering one PSV terminal to battery positive terminal. Jumper other PSV terminal to battery negative terminal. Blow air into port "A" and verify air escapes from port "B". If air escapes from port "B" when PSV is closed and/or does not escape when PSV is open, replace PSV.

Scheme 46

Rollover Valve (Sephia)

Located on top of fuel tank. Testing information not available from manufacturer.

Vapor Separator (Sportage)

Separator is located behind right rear wheelwell along fuel filler pipe. Raise and support vehicle. Remove right rear wheel. Check for loose, missing, cracked or broken connections and parts. Repair or replace as necessary.