Engine Controls - Self-Diagnostics - Sephia & Spectra: Other Kia Spectra I

MALFUNCTION INDICATOR LIGHT

Note. Loose fuel cap will cause MIL to illuminate.

The Electronic Control Module (ECM) is equipped with a self-diagnostic system, which detects system failures or abnormalities. When a malfunction that may affect vehicle emissions is detected during 2 sequential drive cycles, the ECM will illuminate the Malfunction Indicator Light (MIL) on the instrument panel and a corresponding Diagnostic Trouble Code (DTC) will be stored in ECM. If a misfire is detected, MIL will illuminate and DTC will be stored in ECM immediately after fault is detected. If misfire is severe enough to cause catalytic converter damaged, MIL will blink. MIL will continuously blink until danger to catalytic converter has passed. To retrieve stored DTC(s), see RETRIEVING DIAGNOSTIC TROUBLE CODES .

DTC will be erased from ECM memory. If battery is disconnected, all DTCs and freeze frame data will be erased from ECM. As a bulb check, Malfunction Indicator Light (MIL) will also illuminate for about 5 seconds when ignition is turned on.

DTCs will be recorded at various operating times and conditions. Some DTCs require operation of sensor or switch for 5 seconds, while other components require operation for 5 minutes or longer at normal operating temperature, vehicle speed, and load. Therefore, when verifying repair, some DTCs may not set in a service bay and may require road testing to duplicate the conditions under which the code will set.

SERVICE PRECAUTIONS

Before proceeding with diagnosis, following precautions must be observed

1. Ensure vehicle has a fully charged battery and functional charging system.
2. Visually inspect connectors and circuit wiring being worked on.
3. DO NOT disconnect battery or Engine Control Module (ECM) unless instructed to do so. Doing so will erase any fault codes stored in ECM. Turn ignition off before disconnecting battery or damage to ECM may result.
4. DO NOT cause short circuits when performing electrical tests. DO NOT disconnect sensors with ignition on. Either procedure will set additional fault codes, making diagnosis of original problem more difficult.
5. DO NOT use a test light in place of a voltmeter.
6. When checking for spark, DO NOT hold coil wire more than 1/4" from ground. Damage to vehicle electronics and/or ECM may result.
7. DO NOT prolong testing of fuel injectors. Engine may hydrostatically (liquid) lock.
8. The control harness between ECM and Heated Oxygen Sensor (HO2S) has a shield grounded to chassis to prevent electromagnetic interference. If shield is damaged, the control harness must be replaced.

AFTER-REPAIR PROCEDURE

After repair, clear codes. See CLEARING DIAGNOSTIC TROUBLE CODES . Verify repairs by driving vehicle with scan tool connected to OBD-II DLC and monitoring for pending codes.

READINESS DRIVE CYCLE

Perform Readiness Drive Cycle when directed to from diagnostic tests. Readiness drive cycle provides conditions for EVAP monitor to run, so that repairs for EVAP DTC(s) may be verified.

Procedure

1. Check air cleaner. If air cleaner is dirty, replace air cleaner. If air cleaner is okay, go to next step.
2. Check oil cap and oil dipstick installation. If problem exists, repair as necessary. If problem does not exist, go to next step.
3. Check intake tube, breather hose and MAF sensor for air leaks. If problem exists, repair as necessary. If problem does not exist, go to next step. CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for leaks for carburetor spray to dissipate.
4. Backprobe and measure voltage between front Heated Oxygen Sensor (HO2S) connector harness terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Start engine and allow it to reach normal operating temperature. With engine idling, spray short spurts of aerosol carburetor cleaner into following areas while observing voltage changes at Green/Brown wire: Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A long rise in voltage that corresponds to approximate timing and duration of spray of carburetor cleaner indicates air leak in area sprayed. If leak is indicated, repair as necessary. If leak is not indicated, go to next step.
5. Check MAF sensor for contamination, deterioration or damage. If MAF sensor is okay, go to next step. If MAF sensor is contaminated, clean with aerosol brake cleaner and let air dry. Check air cleaner and housing for source of leak and repair as necessary. If MAF sensor is damaged or deteriorated, replace MAF sensor.
6. Disconnect Throttle Position (TP) sensor 3-pin connector. Connect ohmmeter between TP sensor harness connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side). see scheme 14 With throttle closed, resistance should be 1.6-2.4 k/ohms. As throttle is opened, resistance should increase linearly to 4-5 k/ohms at wide open throttle. If resistances are as specified, go to next step. If resistances are not as specified, replace TP sensor.
7. Start engine and allow it to reach normal operating temperature. Backprobe and measure voltage between ECM harness connector terminal No. 73 (Blue/Orange wire) and ground. see scheme 7 Measure voltage at idle and while revving engine up to 3000 RPM. At sea level and 50% relative humidity, voltage should be.9-1.1 volts at idle and increase linearly to about 4.0 volts at 3000 RPM. If voltages are as specified, go to next step. If voltages are not as specified, check MAF sensor wiring and connector for damage. If problem exists, repair wiring or connector as necessary. If problem does not exist, replace MAF sensor.
8. Turn ignition off. Disconnect ECM and TP sensor connectors. Measure resistance of Black/Green wire between TP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 71. see scheme 7and see scheme 14. Also, measure resistance of Blue/White wire between TP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 59. And measure resistance of Blue/Orange wire between TP sensor harness connector terminal No. 3 and ECM harness connector terminal No. 73. If each resistance is less than one ohm, go to next step. If any resistance is one ohm or more, repair appropriate wire(s) between TP sensor and ECM.
9. Connect TP sensor connector. Disconnect MAF sensor 4-pin connector. Measure resistance of Red/Blue wire between MAF sensor harness connector terminal No. 2 and ECM harness connector terminal No. 14. see scheme 7and see scheme 13. Also measure resistance of Red/White wire between MAF sensor harness connector terminal No. 4 and ECM harness connector terminal No. 41. and measure resistance of Black/Yellow wire between ground and MAF sensor harness connector terminal No. 1. If each resistance is less than one ohm, clear codes and retest. If any resistance is one ohm or more, repair appropriate wire(s) between MAF sensor and ECM.

1. Run engine at idle. Backprobe and measure voltage between MAF sensor harness connector terminal No. 3 (Red/Yellow wire) and ground. see scheme 13 If battery voltage exists, go to step 3. If battery voltage does not exist, go to next step.
2. Turn ignition off. Disconnect MAF sensor 4-pin connector. Disconnect engine compartment fuse/relay box Black 68-pin connector JB05 (in center of engine compartment fuse/relay box). see scheme 6 Measure resistance of Red/Yellow wire between MAF sensor harness connector terminal No. 3 and engine compartment fuse/relay box connector JB05 terminal B5. If resistance is less than one ohm, replace EGI main relay. If resistance is one ohm or more, repair open in Red/Yellow wire.
3. Turn ignition off. Disconnect MAF sensor 4-pin connector and ECM 88-pin connector. Measure resistance of Red/White wire between MAF sensor harness connector terminal No. 4 and ECM harness connector terminal No. 41. see scheme 7and see scheme 13. Resistance should be less than one ohm. Check for continuity between ground and ECM harness connector terminal No. 41. Continuity should not exist. If resistance and continuity are as specified, clear codes and retest. If either resistance or continuity is not as specified, repair open or short to ground in Red/Yellow wire between MAF sensor and ECM.

Turn ignition off. Disconnect MAF sensor 4-pin connector and ECM 88-pin connector. Measure resistance of Red/Blue wire between MAF sensor harness connector terminal No. 2 and ECM harness connector terminal No. 14. see scheme 7and see scheme 13. Also, measure resistance of Black/Yellow wire between ground and MAF sensor harness connector terminal No. 1. Ground point is located behind left side of instrument panel. If each resistance is less than one ohm, clear codes and retest. If either resistance is one ohm or more, repair appropriate wire as necessary.

1. Turn ignition off. Disconnect IAT sensor 2-pin connector. Turn ignition on. Measure voltage between ground and IAT sensor harness connector terminal No. 1 (Blue/Green wire). Voltage should be about 5 volts. If voltage is as specified, go to next step. If voltage is more than specified, repair short to power in Blue/green wire between IAT sensor and ECM. If voltage is less than specified, repair open or short to ground in Blue/Green wire between IAT sensor and ECM.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of Black/Green wire between IAT sensor harness connector terminal No. 2 and ECM harness connector terminal No. 71. see scheme 7 If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Black/Green wire between IAT sensor and ECM.
3. Check for continuity between ground and ECM harness connector terminal No. 77 (Blue/Green wire). Continuity should not exist. Also, check continuity between ECM harness connector terminals No. 71 and 77 (Black/Green wire and Blue/Green wire). Continuity should not exist. If each continuity check is as specified, go to next step. If either continuity check is not as specified, repair short to ground in or short between wires.
4. Measure resistance between IAT sensor terminals (component side). Resistance should be 2.205-2.695 k/ohms at 68°F (20°C). If IAT sensor resistance is not as specified, replace IAT sensor. If IAT sensor resistance is as specified, check IAT sensor connector and ECM connector for loose, bent or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect IAT sensor 2-pin connector. Turn ignition on. Measure voltage between ground and IAT sensor harness connector terminal No. 1 (Blue/Green wire). If voltage is about 5 volts, go to next step. If voltage is more than 5 volts, repair short to power in Blue/Green wire between ECM and IAT sensor. If voltage is less than 5 volts, repair open in Blue/Green wire between ECM and IAT sensor.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of Black/Green wire between IAT sensor harness connector terminal No. 2 and ECM harness connector terminal No. 71. see scheme 7 If resistance is less than one ohm, check IAT sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is one ohm or more, repair open in Black/Green wire between IAT sensor and ECM.

Turn ignition off. Disconnect IAT sensor 2-pin connector and ECM 88-pin connector. Check for continuity between ground and IAT sensor harness connector terminal No. 1 (Blue/Green wire). Continuity should not exist. Also, check for continuity between IAT sensor harness connector terminals No. 1 and 2 (Blue/Green wire and Black/Green wire). Continuity should not exist. If each continuity is as specified, clear codes and retest system. If either continuity is not as specified, repair short to ground or short between IAT sensor connector wires.

1. Turn ignition off. Disconnect ECT sensor 3-pin connector and ECM 88-pin connector. Measure resistance of Blue/Yellow wire between ECT sensor harness connector terminal No. 1 and ECM harness connector terminal No. 78. see scheme 7 If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Blue/Yellow wire between ECT sensor and ECM.
2. Remove ECT sensor from engine. Measure resistance between ECT sensor terminals No. 1 and 3 (Blue/Yellow wire and Black/Green wire - component side) and compare with expected values. See «ECT SENSOR RESISTANCE SPECIFICATIONS»(ref-12016-S40895238292001080700000) table. If ECT sensor resistances are as specified, check ECT sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If ECT sensor resistances are not as specified, replace ECT sensor.

ECT SENSOR RESISTANCE SPECIFICATIONS

1. Turn ignition off. Disconnect ECT sensor 3-pin connector. Turn ignition on. Measure voltage between ground and ECT sensor harness connector terminal No. 1 (Blue/Yellow wire). If voltage is about 5 volts, go to next step. If voltage is more than 5 volts, repair short to power in Blue/Yellow wire between ECT sensor and ECM. If voltage is less than 5 volts, repair open in Blue/Yellow wire between ECT sensor and ECM.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of Black/Green wire between ECT sensor harness connector terminal No. 3 and ECM harness connector terminal No. 71. see scheme 7 If resistance is less than one ohm, check ECT sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is one ohm or more, repair open in Black/Green wire between ECT sensor and ECM.

Turn ignition off. Disconnect ECT sensor 3-pin connector. Check for continuity between ground and ECT sensor harness connector terminal No. 1 (Blue/Yellow wire). Continuity should not exist. Also, check for continuity between ECT sensor harness connector terminals No. 1 and 3 (Blue/Yellow wire and Black/Green wire). Continuity should not exist. If each continuity is as specified, check ECT connector and ECM connector for loose, bent or corroded terminals. If problem exists, repair as necessary appropriate connector, then clear codes and retest system. If either continuity is not as specified, repair short to ground or short between IAT sensor connector wires.

1. Turn ignition off. Disconnect TP sensor 3-pin connector. Turn ignition on. Measure voltage between ground and TP sensor harness connector terminal No. 2 (Blue/White wire). see scheme 14 Voltage should be about 5 volts. If voltage is as specified, go to next step. If voltage is not as specified, go to step 4.
2. Measure voltage between ground and TP sensor harness connector terminal No. 3 (Blue/Orange wire). Voltage should be 5.6-5.8 volts. If voltage is as specified, go to next step. If voltage is not as specified, go to step 6.
3. Turn ignition off. Measure resistance between TP sensor harness connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side). Resistance should be 1.6-2.4 k/ohms with throttle closed. As throttle is opened, resistance should smoothly increase linearly to over 4 k/ohms at wide open throttle. If resistances are as specified, go to next step. If resistances are not as specified, replace TP sensor.
4. Turn ignition off. Disconnect ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 59 (Blue/White wire). see scheme 7 If continuity does not exist, check TP sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If continuity exists, go to next step.
5. Check for source of short to ground. Disconnect CAS and FTPS one at a time while monitoring continuity between ground and ECM harness connector terminal No. 59 (Blue/White wire). If short to ground is corrected when either component is removed, replace that component. If continuity still exists with CAS and FTPS removed, repair short to ground in Blue/White wire between TP sensor and CAS or FTPS.
6. Turn ignition off. Disconnect ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 73 (Blue/Orange wire). If continuity exists, repair short to ground in Blue/Orange wire between ECM and TP sensor. If continuity does not exist, check TP sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect TP sensor 3-pin connector. Turn ignition on. Measure voltage between ground and TP sensor harness connector terminal No. 3 (Blue/Orange wire). see scheme 14 If voltage is 5.6-5.8 volts, go to next step. If voltage is more than 5.8 volts, repair short to power in Blue/Orange wire between TP sensor and ECM. If voltage is less than 5.6 volts, check TP sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If problem does not exist, repair open in Blue/Orange wire between TP sensor and ECM.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of Black/Green wire between TP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 71. see scheme 7and see scheme 14. If resistance is less than ohm, go to next step. If resistance is one ohm or more, check TP sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If problem does not exist, repair open in Black/Green wire between TP sensor and ECM.
3. Turn ignition off. Measure resistance between TP sensor harness connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side). Resistance should be 1.6-2.4 k/ohms with throttle closed. As throttle is opened, resistance should smoothly increase linearly to over 4 k/ohms at wide open throttle. If resistances are not as specified, replace TP sensor. If resistances are as specified, check TP sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Drain coolant, remove thermostat for inspection. If thermostat is found stuck open, replace thermostat. replace drained coolant. If thermostat is okay, go to next step.
2. Temporarily install good known thermostat and check for proper operation. If problem is corrected, replace thermostat. If problem is not corrected, go to next step.
3. Remove ECT sensor from engine. Measure resistance between ECT sensor terminals No. 1 and 3 (Blue/Yellow wire and Black/Green wire - component side) and compare with expected values. See «ECT SENSOR RESISTANCE SPECIFICATIONS»(ref-12016-S40895238292001080700000) table. If ECT sensor resistances are as specified, check ECT sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If ECT sensor resistances are not as specified, replace ECT sensor.
4. For testing of the ECT sensor circuit. See «DTC P0117: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT LOW INPUT»(ref-12016-S21839212502001080700000) and «DTC P0118: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT HIGH INPUT»(ref-12016-S05363439212001080700000) .

1. Measure voltage bewteen front HO2S fuse and ground. If battery voltage is present go to next step. If battery voltage is not present, replace fuse. Measure voltage at HO2S harness connector terminal No. 1 (Pink wire). If voltage is present go to next step, If voltage is not present, check for open in Pink wire between fuse and HO2S. Repair as necessary.
2. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Check for continuity between front HO2S harness connector terminals No. 2 and 4 (Green/Blue wire and Green/Brown wire). see scheme 9 If continuity does not exist, go to next step. If continuity exists, repair short between Green/Blue wire and Green/Brown wire.
3. Turn ignition off. Measure resistance between front HO2S harness connector terminals No. 1 and 3 (Pink wire and Green/Black wire - component side). If resistance is 2-4 ohms, check front HO2S connector and ECM connector for loose, damaged and corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is not 2-4 ohms, replace front HO2S.
4. Connect front HO2S connector. Start and idle engine. When engine reaches operating temperature, backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. Voltage should switch between about 400 millivolts and 1100 millivolts at least 3 times in 10 seconds. If voltage is not as specified, replace front HO2S. If voltage is as specified, check front HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 12 (Green/Brown wire). see scheme 7 If continuity does not exist, go to step 3. If continuity exists, repair short to ground in Green/Brown wire between front HO2S connector and ECM connector.
2. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 11 (Green/Blue wire). see scheme 7 If continuity does not exist, go to next step. If continuity exists, repair short to ground in Green/Blue wire between front HO2S connector and ECM connector.
3. Connect front HO2S connector and ECM connector. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Voltage should switch between about 400 millivolts and about 1100 millivolts at least 3 times in 10 seconds. If voltage is not as specified, replace front HO2S. If voltage is as specified, check front HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Turn ignition on. Check for voltage between ground and front HO2S 4-pin harness connector terminal No. 4 (Green/Brown wire). see scheme 7 Voltage should be 1.1 volts. If voltage is to specification, check for poor, loose or damaged terminals and repair as necessary. If voltage is higher than specification, repair short to power in Green/Brown wire between front HO2S and ECM.
2. Turn ignition on. Check for voltage between ground and front HO2S 4-pin harness connector terminal No. 2 (Green/Blue wire). Voltage should be 1.1 volts. If voltage is to specification, check for poor, loose or damaged terminals and repair as necessary. If voltage is higher than specification, repair short to power in Green/Blue wire between front HO2S and ECM.
3. Turn ignition off. Connect front HO2S connector and ECM connector. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Voltage should switch between about 400 millivolts and 1100 millivolts at least 3 times in 10 seconds. If voltage is not as specified, replace front HO2S. If voltage is as specified, check front HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

Note. If any misfire, purge solenoid, MAF sensor or HO2S heater codes are present, repair those first.

1. Check front and rear HO2Ss for reversed connections. If problem exists, switch connectors. If problem does not exist, go to next step.
2. Check for split, disconnected or damaged vacuum hoses. Check PCV valve operation. See POSITIVE CRANKCASE VENTILATION (PCV) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. Check Purge Solenoid Valve (PSV) installation and operation. See appropriate test under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem exists, replace vacuum hose(s), PCV valve and/or PSV as necessary. If problem does not exist, go to next step.
3. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Voltage should switch between about 400 millivolts and 1100 millivolts at least 3 times in 10 seconds. If voltage is as specified, go to next step. If voltage is not as specified, perform checks in step 5. If no intake leaks are indicated in next step, replace front HO2S. If intake leak is indicated in next step, repair leak as necessary. CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for leaks for carburetor spray to dissipate.
4. With engine idling, spray short bursts of aerosol carburetor cleaner in following areas while observing voltage changes at front HO2S harness connector terminal No. 4 (Green/Brown wire): Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A rise in voltage that lasts about as long as the duration of carburetor cleaner spray indicates an intake leak. If leak is indicated, repair as necessary. If no leak is indicated, go to next step.
5. With engine idling, have helper hold wadded rag against tailpipe. Listen for exhaust leaks between main catalytic converter and cylinder head. If exhaust leak is detected, repair as necessary.
6. Perform fuel pressure test, maximum fuel pressure test and fuel pressure hold test. See appropriate tests under FUEL PRESSURE under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If all fuel pressure tests are within specifications, replace front HO2S. If any fuel pressure test is not within specifications, repair fuel system as necessary.

Note. If any misfire, purge solenoid, MAF sensor or HO2S heater codes are present, repair those first.

1. Turn ignition off. Check for continuity of FRONT O2 fuse (10-amp). If FRONT O2 fuse is blown, replace fuse and repair short to ground in Pink wire between front HO2S and engine compartment fuse/relay box. If FRONT O2 fuse is okay, go to next step.
2. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Measure resistance of Green/Blue wire between front HO2S harness connector terminal No. 2 and ECM harness connector terminal No. 11. see scheme 7and see scheme 9. Also, measure resistance of Green/Brown wire between front HO2S harness connector terminal No. 4 and ECM harness connector terminal No. 12. If each resistance is less than one ohm, go to next step. If either resistance is one ohm or more, repair open in appropriate wire between front HO2S and ECM.
3. Turn ignition on. Measure voltage between ground and front HO2S harness connector terminal No. 1. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Pink wire between engine compartment fuse/relay box and front HO2S.
4. Connect front HO2S connector. Ensure scan tool is connected to OBD-II Data Link Connector (OBD-II DLC). Drive vehicle and using scan tool, monitor front HO2S input voltage. Front HO2S should switch from rich to lean at least 3 times each 10 seconds. If front HO2S is switching as specified, check front HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If front HO2S is not switching as specified, replace front HO2S.

1. Turn ignition off. Check continuity of FRONT O2 fuse (10-amp). If FRONT O2 fuse is blown, replace fuse and repair short to ground in Pink wire between front HO2S and engine compartment fuse/relay box. If FRONT O2 fuse is okay, go to next step.
2. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Measure resistance of Green/Black wire between front HO2S harness connector terminal No. 3 and ECM harness connector terminal No. 37. see scheme 7and see scheme 9. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Green/Black wire between front HO2S and ECM.
3. Turn ignition on. Check for voltage between ground and ECM harness connector terminal No. 37 (Green/Black wire). If voltage exists, repair short to power in Green/Black wire between front HO2S connector and ECM connector. If voltage does not exist, go to next step.
4. Turn ignition off. Measure resistance between front HO2S harness connector terminals No. 1 and 3 (Pink wire and Green/Black wire - component side). If resistance is 2-4 ohms, check front HO2S connector and ECM connector for loose, damaged and corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is not 2-4 ohms, replace front HO2S.

1. Measure voltage bewteen front HO2S fuse and ground. If battery voltage is present go to next step. If battery voltage is not present, replace fuse. Measure voltage at HO2S harness connector terminal No. 1 (Pink wire). If voltage is present go to next step, If voltage is not present, check for open in Pink wire between fuse and HO2S. Repair as necessary.
2. Turn ignition off. Disconnect rear HO2S 4-pin connector. Check for continuity between rear HO2S harness connector terminals No. 2 and 4 (Violet/White wire and Green/White wire). see scheme 9 If continuity exists, repair short between Violet/White wire and Green/White wire. If continuity does not exist, go to next step.
3. Turn ignition off. Measure resistance between front HO2S harness connector terminals No. 1 and 3 (Pink wire and Green/Red wire - component side). If resistance is 2-4 ohms, check front HO2S connector and ECM connector for loose, damaged and corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is not 2-4 ohms, replace front HO2S.
4. Connect rear HO2S connector. Start and idle engine. When engine reaches normal operating temperature, backprobe and monitor voltage between rear HO2S harness connector terminal No. 4 (Green/White wire) and ground. Increase engine speed to 2000-2500 RPM for 5-10 seconds, then release throttle. Repeat several times while monitoring rear HO2S voltage. Rear HO2S voltage should rise during sustained high RPM and drop significantly when throttle is snapped shut. If rear HO2S voltage does not change as specified, replace rear HO2S. If rear HO2S voltage changes as specified, check rear HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 39 (Green/White wire). see scheme 9 If continuity does not exist, go to step 3. If continuity exists, repair short to ground in Green/White wire between front HO2S connector and ECM connector.
2. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Check for continuity between ground and ECM harness connector terminal No. 10 (Violet/White wire). see scheme 7 If continuity does not exist, go to next step. If continuity exists, repair short to ground in Violet/White wire between front HO2S connector and ECM connector.
3. Connect rear HO2S connector. Start and idle engine. When engine reaches normal operating temperature, backprobe and monitor voltage between rear HO2S harness connector terminal No. 4 (Green/White wire) and ground. Increase engine speed to 2000-2500 RPM for 5-10 seconds, then release throttle. Repeat several times while monitoring rear HO2S voltage. Rear HO2S voltage should rise during sustained high RPM and drop significantly when throttle is snapped shut. If rear HO2S voltage does not change as specified, replace rear HO2S. If rear HO2S voltage changes as specified, check rear HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Turn ignition on. Check for voltage between ground and front HO2S 4-pin harness connector terminal No. 4 (Green/White wire). see scheme 7 Voltage should be 1.1 volts. If voltage is to specification, check for poor, loose or damaged terminals and repair as necessary. If voltage is higher than specification, repair short to power in Green/White wire between front HO2S and ECM.
2. Turn ignition on. Check for voltage between ground and front HO2S 4-pin harness connector terminal No. 2 (Violet/White wire). Voltage should be 1.1 volts. If voltage is to specification, check for poor, loose or damaged terminals and repair as necessary. If voltage is higher than specification, repair short to power in Violet/White wire between front HO2S and ECM.
3. Connect rear HO2S connector. Start and idle engine. When engine reaches normal operating temperature, backprobe and monitor voltage between rear HO2S harness connector terminal No. 4 (Green/White wire) and ground. Increase engine speed to 2000-2500 RPM for 5-10 seconds, then release throttle. Repeat several times while monitoring rear HO2S voltage. Rear HO2S voltage should rise during sustained high RPM and drop significantly when throttle is snapped shut. If rear HO2S voltage does not change as specified, replace rear HO2S. If rear HO2S voltage changes as specified, check rear HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

Note. If any misfire, purge solenoid, MAF sensor or HO2S heater codes are present, repair those first.

1. Check front and rear HO2Ss for reversed connections. If problem exists, switch connectors. If problem does not exist, go to next step.
2. Check for split, disconnected or damaged vacuum hoses. Check PCV valve operation. See POSITIVE CRANKCASE VENTILATION (PCV) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. Check Purge Solenoid Valve (PSV) installation and operation. See appropriate test under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem exists, replace vacuum hose(s), PCV valve and/or PSV as necessary. If problem does not exist, go to next step.
3. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between rear HO2S harness connector terminal No. 4 (Green/White wire) and ground. see scheme 9 Increase engine speed to 2000-2500 RPM for 5-10 seconds, then release throttle. Repeat several times while monitoring rear HO2S voltage. Rear HO2S voltage should rise during sustained high RPM and drop significantly when throttle is snapped shut. If rear HO2S voltage changes as specified, go to next step. If rear HO2S voltage does not change as specified, perform checks listed in step 5. If intake leak is not indicated in next step, replace rear HO2S. If intake leak is indicated in next step, repair leak as necessary. CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for carburetor spray to dissipate.
4. With engine idling, spray short bursts of aerosol carburetor cleaner in following areas while observing voltage changes at front HO2S harness connector terminal No. 4 (Green/Brown wire): Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A rise in voltage that lasts about as long as duration of carburetor cleaner spray indicates an intake leak. If leak is indicated, repair as necessary. If no leak is indicated, go to next step.
5. With engine idling, have helper hold wadded rag against tailpipe. Listen for exhaust leaks between main catalytic converter and cylinder head. If exhaust leak is detected, repair as necessary.
6. Perform fuel pressure test, maximum fuel pressure test and fuel pressure hold test. See appropriate tests under FUEL PRESSURE under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If all fuel pressure tests are within specifications, replace rear HO2S. If any fuel pressure test is not within specifications, repair fuel system as necessary.

Note. If any misfire, purge solenoid, MAF sensor or HO2S heater codes are present, repair those first.

1. Check continuity of REAR O2 fuse (10-amp). If REAR O2 fuse is blown, replace fuse and repair short to ground in Pink wire between rear HO2S and engine compartment fuse/relay box. If REAR O2 fuse is okay, go to next step.
2. Turn ignition off. Disconnect rear HO2S 4-pin connector and ECM 88-pin connector. Measure resistance of Violet/White wire between rear HO2S harness connector terminal No. 2 and ECM harness connector terminal No. 10. see scheme 7and see scheme 9. Also, measure resistance of Green/White wire between rear HO2S harness connector terminal No. 4 and ECM harness connector terminal No. 39. If each resistance is less than one ohm, go to next step. If either resistance is one ohm or more, repair open in appropriate wire between rear HO2S and ECM.
3. Connect rear HO2S connector. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between rear HO2S harness connector terminal No. 4 (Green/White wire) and ground. Increase engine speed to 2000-2500 RPM for 5-10 seconds, then release throttle. Repeat several times while monitoring rear HO2S voltage. Rear HO2S voltage should rise during sustained high RPM and drop significantly when throttle is snapped shut. If rear HO2S voltage does not change as specified, replace rear HO2S. If rear HO2S voltage changes as specified, check rear HO2S connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Check continuity of REAR O2 fuse (10-amp). If REAR O2 fuse is blown, replace fuse and repair short to ground in Pink wire between rear HO2S and engine compartment fuse/relay box. If REAR O2 fuse is okay, go to next step.
2. Disconnect rear HO2S 4-pin connector and ECM 88-pin connector. Measure resistance of Green/Red wire between rear HO2S harness connector terminal No. 3 and ECM harness connector terminal No. 30. see scheme 7and see scheme 9. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Green/Red wire between rear HO2S and ECM.
3. Turn ignition on. Check for voltage between ground and ECM harness connector terminal No. 30 (Green/Red wire). If voltage exists, repair short to power in Green/Red wire between rear HO2S and ECM. If voltage does not exist, go to next step.
4. Turn ignition off. Measure resistance between rear HO2S harness connector terminals No. 1 and 3 (Pink wire and Green/Red wire - component side). Rear HO2S resistance should be 2-4 ohms at 73°F (23°C). If resistance is not as specified, replace rear HO2S. If resistance is as specified, check ECM connector and rear HO2S connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

Note. If any fuel injector, HO2S, Engine Coolant Temperature (ECT) sensor or Mass Airflow (MAF) sensor codes are present, repair those first. Using scan tool, clear DTCs. Drive vehicle with Kia Data Pro connected to OBD-II Data Link Connector (OBD-II DLC) and monitor for pending codes. If DTC P0171 returns, perform following procedure.

1. Check vacuum hoses for leaks. Check PCV valve operation. Check for vacuum at EVAP canister when purge is not operating. Check purge solenoid valve for proper installation and operation. See «DTC P0443: EVAP SYSTEM PURGE CONTROL CIRCUIT MALFUNCTION»(ref-12016-S42292254982001080700000). If problem exists, repair as necessary. If problem does not exist, go to next step.
2. Perform fuel pressure test. Perform maximum fuel pressure test. Perform fuel pressure hold test. See appropriate tests under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If all tests are within specifications, go to next step. If any test is not within specifications, repair fuel system as necessary.
3. Perform fuel injector inspection and volume test. See appropriate test under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If problem exists, clean or replace fuel injectors as necessary. If problem does not exist, go to next step. CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for carburetor spray to dissipate.
4. Start engine and bring to operating temperature. Backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 With engine idling, spray short bursts of aerosol carburetor cleaner in following areas while observing voltage changes: Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Gasket between intake manifold and cylinder head. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A rise in voltage that lasts about as long as duration of carburetor cleaner spray indicates an intake leak. If leak is indicated, repair as necessary. If no leak is indicated, go to next step.
5. With engine idling, have helper hold wadded rag against tailpipe. Listen for exhaust leaks between main catalytic converter and cylinder head. If exhaust leak is detected, repair as necessary. If exhaust leak is not detected, go to next step.
6. With engine at idle, remove one injector harness connector measure decrease in engine RPM. Perform in sequence remaining injectors. Any cylinder with little or no change in RPM, inspect for faulty injector, repair as necessary.
7. Engine off remove spark plugs (note location) inspect spark plugs for abnormality. If any spark plug with abnormal color is found, inspect engine for mechanical failure. Perform compression test, repair as necessary.
8. Turn ignition off. Check Mass Airflow (MAF) sensor for contamination, deterioration or damage. If problem exists, clean or replace MAF sensor as necessary. For testing of MAF, see «DTC P0101: MASS AIRFLOW (MAF) SENSOR RANGE/PERFORMANCE PROBLEM»(ref-12016-S40452777772001080700000). If problem does not exist, go to next step.
9. Disconnect TP sensor 3-pin connector. Measure resistance between TP sensor harness connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side) with throttle valve closed and while smoothly opening throttle valve. see scheme 14 When throttle valve is closed, resistance should be 1.6-2.4 k/ohms. As throttle valve is opened, resistance should increase linearly. Replace TP sensor as necessary. If TP sensor is okay, go to next step.
10. Start and idle engine. Backprobe and measure voltage between ECM harness connector terminal No. 41 (Red/White wire) and ground. see scheme 7 With engine at idle verify voltage is about.8 - 1.1 volts. If voltage is within specifications, go to next step. If voltage is not within specifications, check MAF sensor connector, ECM connector and wiring between MAF sensor and ECM. If problem exists, repair connector or wiring as necessary. If problem does not exist, replace MAF sensor.
11. Turn ignition off. Disconnect TP sensor 3-pin connector and ECM 88-pin connector. Measure resistance of Black/Green wire between TP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 71. see scheme 7and see scheme 14. Also, measure resistance of Blue/White wire between TP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 59. And measure resistance of Blue/Orange wire between TP sensor harness connector terminal No. 3 and ECM harness connector terminal No. 73. If each resistance is less than one ohm, go to next step. If any resistance is one ohm or more, repair open in appropriate wire between TP sensor and ECM.
12. Disconnect MAF sensor 4-pin connector. Measure resistance of Red/Blue wire between MAF sensor harness connector terminal No. 2 and ECM harness connector terminal No. 14. see scheme 7and see scheme 13. Also, measure resistance of Red/White wire between MAF sensor harness connector terminal No. 4 and ECM harness connector terminal No. 41. And measure resistance of Black/Yellow wire between MAF sensor harness connector terminal No. 1 and ground. Ground point is located behind left side of instrument panel. If each resistance is less than one ohm, check TP sensor connector, MAF sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If any resistance is one ohm or more, repair open in appropriate wire between MAF sensor and ECM.

Note. If any fuel injector, HO2S, Engine Coolant Temperature (ECT) sensor or Mass Airflow (MAF) sensor codes are present, repair those first. Using scan tool, clear DTCs. Drive vehicle with Kia Data Pro connected to OBD-II Data Link Connector (OBD-II DLC) and monitor for pending codes. If DTC P0172 returns, perform following procedure.

1. Check spark plugs, plug wires and ignition coil. See IGNITION CHECKS in BASIC DIAGNOSTIC PROCEDURES article. If problem exists, repair as necessary. If problem does not exist, go to next step.
2. Perform fuel pressure test. Perform maximum fuel pressure test. Perform fuel pressure hold test. See appropriate tests under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If all tests are within specifications, go to next step. If any test is not within specifications, repair fuel system as necessary.
3. Perform fuel injector inspection and volume test. See appropriate test under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If problem exists, clean or replace fuel injectors as necessary. If problem does not exist, go to next step.
4. Start engine and bring to operating temperature. Backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 With engine idling, front HO2S voltage should switch from rich to lean a minimum of 3 times in 10 seconds. If front HO2S voltage switches as specified, go to next step. If front HO2S voltage does not switch as specified, replace front HO2S.
5. Turn ignition off. Check Mass Airflow (MAF) sensor for contamination, deterioration or damage. If problem exists, clean or replace MAF sensor as necessary. If problem does not exist, go to next step.
6. Disconnect TP sensor 3-pin connector. Measure resistance between TP sensor harness connector terminals No. 2 and 3 (Blue/White wire and Blue/Orange wire - component side) with throttle valve closed and while smoothly opening throttle valve. see scheme 14 When throttle valve is closed, resistance should be 1.6-2.4 k/ohms. As throttle valve is opened, resistance should increase linearly. Replace TP sensor as necessary. If TP sensor is okay, go to next step.
7. Start and idle engine. Backprobe and measure voltage between ECM harness connector terminal No. 41 (Red/White wire) and ground. see scheme 7 With engine at idle verify voltage is about.8 - 1.1 volts. Open throttle slowly and verify voltage increases with air flow, about 2.0 - 3.5 volts at 33000 RPM with no load. If voltages are within specifications, go to next step. If voltages are not within specifications, check MAF sensor connector, ECM connector and wiring between MAF sensor and ECM. See «DTC P0101: MASS AIRFLOW (MAF) SENSOR RANGE/PERFORMANCE PROBLEM»(ref-12016-S40452777772001080700000). If connectors and wiring are okay, replace MAF sensor.
8. Turn ignition off. Disconnect TP sensor 3-pin connector and ECM 88-pin connector. Measure resistance of Black/Green wire between TP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 71. see scheme 7and see scheme 14. Also, measure resistance of Blue/White wire between TP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 59. And measure resistance of Blue/Orange wire between TP sensor harness connector terminal No. 3 and ECM harness connector terminal No. 73. If each resistance is less than one ohm, go to next step. If any resistance is one ohm or more, repair open in appropriate wire between TP sensor and ECM.
9. Disconnect MAF sensor 4-pin connector. Measure resistance of Red/Blue wire between MAF sensor harness connector terminal No. 2 and ECM harness connector terminal No. 14. see scheme 7and see scheme 13. Also, measure resistance of Red/White wire between MAF sensor harness connector terminal No. 4 and ECM harness connector terminal No. 41. And measure resistance of Black/Yellow wire between ground and MAF sensor harness connector terminal No. 1. Ground point is located behind left side of instrument panel. If each resistance is less than one ohm, check TP sensor connector, MAF sensor connector and ECM connector for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If any resistance is one ohm or more, repair open in appropriate wire between MAF sensor and ECM.

1. Remove INJ fuse (10-amp) from engine compartment fuse/relay box. Check continuity of fuse. If fuse is okay, install fuse and go to next step. If fuse is blown, replace fuse and retest system.
2. Turn ignition off. Disconnect fuel injector 2-pin connector from appropriate fuel injector. Turn ignition on. Measure voltage between ground and appropriate fuel injector harness connector terminal No. 1 (Red/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red/Yellow wire between INJ fuse (10-amp) in engine compartment fuse/relay box and fuel injector.
3. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of wire between appropriate fuel injector and corresponding ECM harness connector terminal. See «IDENTIFYING FUEL INJECTOR-TO-ECM CIRCUIT»(ref-12016-S33315391302001080700000) table. see scheme 7 If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in wire between fuel injector and ECM. IDENTIFYING FUEL INJECTOR-TO-ECM CIRCUIT Injector No. Color of Wire Between Injector & ECM ECM Connector Terminal No. 1 Brown/Black 3 2 Brown/Green 32 3 Brown/Black 31 4 Brown/Yellow 4
4. Check for continuity between ground and ECM harness connector terminal used in previous step. If no continuity exists, go to next step. If continuity exists, repair short to ground in wire between fuel injector and ECM.
5. Turn ignition on. Measure voltage between ground and ECM harness connector terminal used in previous step. If no voltage exists, go to next step. If voltage exists, repair short to power in wire between appropriate fuel injector and ECM.
6. Measure resistance between fuel injector harness connector terminals (component side). Resistance should be 14-15 ohms at 68°F (20°C). If resistance is not as specified, replace fuel injector. If resistance is as specified, check fuel injector connector, ECM connector and engine compartment fuse/relay box harness connector terminals for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

Note. If any fuel injector codes, or pending codes, are present, repair those codes first.

1. Check vacuum hoses for leaks. Check PCV valve operation. See POSITIVE CRANKCASE VENTILATION (PCV) under EMISSIONS SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. Check purge solenoid valve for proper installation and operation. See FUEL EVAPORATION under EMISSIONS SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem exists, repair as necessary. If problem does not exist, go to next step.
2. Disconnect CKP sensor 3-pin connector. Measure resistance between CKP sensor harness connector terminals No. 1 and No. 2 (Blue/Orange wire and Green/Orange wire - component side). see scheme 3 Resistance should be 800-900 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace CKP sensor.
3. Remove CKP sensor from transaxle and calculate air gap between sensor and flywheel. Measure distance from transaxle housing to teeth on flywheel (measurement "A"). Measure distance from mounting surface on CKP sensor to CKP sensor tip (measurement "B"). Subtract measurement "B" from measurement "A" to get air gap. Air gap should be.037-.067" (.95-1.70 mm). If air gap is not as specified, repair as necessary. If air gap is as specified, check for loose, damaged or corroded terminals at CKP sensor and ECM. If problem exists, repair as necessary appropriate connector. If problem does not exist, go to next step.
4. Turn ignition off. Disconnect ignition coils connector. Turn ignition on. Measure voltage between ground and ignition coils harness connector terminals No. 1 and 2 (both Yellow wires). If battery voltage exists at each terminal, go to next step. If battery voltage does not exist at either terminal, repair open in appropriate Yellow wire(s) between ignition coil and engine compartment fuse/relay box.
5. Visually inspect ignition coils and plug wires for cracks or carbon tracing. Check resistance of coil primary and secondary coils. Primary coil resistance should be 450-550 milliohms at 68°F (20°C). Secondary coil resistance should be 13-15 k/ohms at 68°F (20°C). Check resistance of plug wires. Plug wire resistance should be 16 k/ohms per 3.28 ft (meter). If any part does not pass visual inspection or resistance test, replace parts. If all parts pass visual inspection and resistance tests, go to next step.
6. Remove spark plugs. Check condition and gap of spark plugs. Spark plug gaps should be.027-.031" (.7-.8 mm). If problem exists, replace spark plugs as necessary. If problem does not exist, go to next step.
7. Perform compression test. Compression should be about 193 psi at 300 RPM with no more than 10 percent variation between highest and lowest cylinders. If compression test is within specifications, go to next step. If compression test is not within specifications, perform leak down test to determine source of low compression and repair as necessary.
8. Backprobe and monitor voltage between front Heated Oxygen Sensor (HO2S) harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Start engine and allow it to reach normal operating temperature. With engine idling, spray short spurts of aerosol carburetor cleaner into following areas while observing voltage changes: Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A long rise in voltage that corresponds to approximate timing and duration of spray of carburetor cleaner indicates air leak in area sprayed. If leak is indicated, repair as necessary. If no leak is indicated, go to next step.
9. Release fuel pressure. Connect fuel pressure gauge to service port on fuel rail. With engine at normal operating temperature, check fuel pressure at idle. If fuel pressure is 46-51 psi (320-350 kPa) go to step 11. If fuel pressure is less than 46 psi (320 kPa), pinch off fuel return hose. If fuel pressure increases, replace fuel pressure regulator. If fuel pressure does not increase, check fuel filter for restriction. If fuel filter is okay, go to next step.
10. Check fuel pump maximum pressure. See MAXIMUM FUEL PRESSURE (SEPHIA) test under FUEL PRESSURE under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is less than specification, replace fuel pump or fuel pump filter as necessary. If fuel pressure is more than 51 psi (350 kPa), remove return hose from fuel filter and check for restrictions. If hose is not restricted, replace fuel pressure regulator. If line is restricted, repair as necessary.
11. Perform fuel injector inspection and volume test. See FUEL INJECTORS under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If any fuel injector is not operating or dispensing fuel properly, repair as necessary. If fuel injectors are operating and dispensing fuel okay, check all connectors in related circuits for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.

1. Turn ignition off. Disconnect CKP sensor 3-pin connector and ECM 88-pin connector. Measure resistance of Blue/Orange wire between CKP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 16. see scheme 3and see scheme 7. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Blue/Orange wire between CKP sensor and ECM.
2. Measure resistance of Green/Orange wire between CKP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 43. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Green/Orange wire between CKP sensor and ECM.
3. Check for continuity between ECM harness connector terminals No. 16 and 43 (Blue/Orange wire and Green/Orange wire). If continuity does not exist, go to next step. If continuity exists, repair short between CKP sensor wires.
4. Turn ignition on. Measure voltage between ground and ECM harness connector terminal No. 16 (Blue/Orange wire). Also, measure voltage between ground and ECM harness connector terminal No. 43. If voltage does not exist at either terminal, go to next step. If voltage exists at either terminal, repair short to power in appropriate wire between CKP sensor and ECM.
5. Turn ignition off. Connect CKP sensor connector. Measure resistance between ECM harness connector terminals No. 16 and 43 (Blue/Orange wire and Green/Orange wire). see scheme 7 Resistance should be 800-900 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace CKP sensor.
6. Remove CKP sensor from transaxle and calculate air gap between sensor and flywheel. Measure distance from transaxle housing to teeth on flywheel (measurement "A"). Measure distance from mounting surface on CKP sensor to CKP sensor tip (measurement "B"). Subtract measurement "B" from measurement "A" to get air gap. Air gap should be.037-.067" (.95-1.70 mm). If air gap is not as specified, repair as necessary. If air gap is as specified, check for loose, damaged or corroded terminals at CKP sensor and ECM. If problem exists, repair as necessary. If problem does not exist, go to next step. NOTE: DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.
7. Install CKP sensor and connect CKP sensor connector. Connect ECM connector. Connect lab scope positive probe to ECM harness connector terminal No. 16 (Blue/Orange wire). Connect lab scope negative probe to ECM harness connector terminal No. 43 (Green/Orange wire). see scheme 7 Start engine and warm up to normal operating temperature. Allow engine to idle and observe CKP waveform. Compare to normal waveform. (Scheme 31) If CKP sensor waveform is erratic, replace CKP sensor. If waveform is okay, wiggle wiring harness while observing waveform. If waveform becomes erratic while wiggling harness, repair wiring harness as necessary.

Scheme 31

1. Turn ignition off. Disconnect CKP 3-pin connector and ECM 88-pin connector. Measure resistance of Blue/Orange wire between CKP sensor harness connector terminal No. 1 and ECM harness connector terminal No. 16. see scheme 3and see scheme 7. Also, measure resistance of Green/Orange wire between CKP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 43. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open between CKP sensor connector and ECM connector.
2. Connect CKP sensor connector. Measure resistance between ECM harness connector terminals No. 16 and 43 (Blue/Orange wire and Green/Orange wire). Resistance should be 800-900 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, check CKP sensor connector and ECM connector. If problem exists, repair as necessary appropriate connector. If problem does not exist, replace CKP sensor.
3. Remove CKP sensor from transaxle and calculate air gap between sensor and flywheel. Measure distance from transaxle housing to teeth on flywheel (measurement "A"). Measure distance from mounting surface on CKP sensor to CKP sensor tip (measurement "B"). Subtract measurement "B" from measurement "A" to get air gap. Air gap should be.037-.067" (.95-1.70 mm). If air gap is not as specified, repair as necessary. If air gap is as specified, check for loose, damaged or corroded terminals at CKP sensor connector and ECM connector. Also, inspect flywheel/torque converter sensor ring teeth. Ensure all teeth are intact and ring is properly positioned. If problem exists, repair as necessary. If problem does not exist, go to next step. NOTE: DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.
4. Connect lab scope positive probe to ECM harness connector terminal No. 16 (Blue/Orange wire). Connect lab scope negative probe to ECM harness connector terminal No. 43 (Green/Orange wire). see scheme 7 Set lab scope time to 50 milliseconds and voltage to 5 volts. Start engine and warm up to normal operating temperature. Allow engine to idle and compare CKP sensor waveform to normal CKP sensor waveform. (Scheme 31) If waveform is erratic, replace CKP sensor. If waveform is okay, wiggle wiring harness between CKP sensor and ECM while observing waveform. If waveform becomes erratic while wiggling harness, repair wiring harness as necessary.

1. Turn ignition off. Disconnect CMP sensor 3-pin connector and ECM 88-pin connector. Check for continuity between ground and CMP sensor terminal No. 2 (Blue/Red wire). see scheme 4 If continuity exists, repair short to ground in Blue/Red wire between CMP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 44. see scheme 7 If continuity does not exist, go to next step.
2. Check for continuity between ground and CMP sensor harness connector terminal No. 2 (Blue/Red wire - component side). If continuity exists, replace CMP sensor. If continuity does not exist, go to next step. NOTE: DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.
3. Connect lab scope positive probe to ECM harness connector terminal No. 44 (Blue/Red wire). see scheme 7 Connect lab scope negative probe to ground. Set lab scope time to 50 milliseconds and voltage to 5 volts. Start engine and warm up to normal operating temperature. Allow engine to idle and compare CMP sensor waveform to normal CMP sensor waveform. (Scheme 32) If waveform is erratic, replace CMP sensor. If waveform is okay, wiggle wiring harness between ECM and CMP sensor while observing waveform. If waveform becomes erratic while wiggling harness, repair wiring harness as necessary.

Scheme 32

1. Turn ignition off. Disconnect CMP sensor 3-pin connector and ECM 88-pin connector. Measure resistance of Blue/Red wire between CMP sensor harness connector terminal No. 2 and ECM harness connector terminal No. 44. see scheme 4and see scheme 7. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Blue/Red wire between CMP sensor and ECM.
2. Measure resistance between ground and CMP sensor harness connector terminal No. 3 (Black/Yellow wire). If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Black/Yellow wire between CMP sensor and ground. Ground point is located behind left side of instrument panel.
3. Turn ignition on. Measure voltage between ground and ECM harness connector terminal No. 44 (Blue/Red wire). If voltage exists, repair short to power in Blue/Red wire between CMP sensor and ECM. If voltage does not exist, go to next step.
4. Turn ignition off. Connect ECM connector. Turn ignition on. Measure voltage between ground and CMP sensor harness connector terminal No. 1 (Red/Yellow wire). If battery voltage exists, go to step 6. If battery voltage does not exist, go to next step.
5. Check continuity of INJ fuse (10-amp). If fuse is blown, replace fuse. If fuse is okay, check for voltage at engine compartment fuse/relay box Black connector JB05 terminal E5 (Red/Yellow wire). see scheme 6 If battery voltage exists, repair open in Red/Yellow wire between engine compartment fuse/relay box and CMP sensor. If battery voltage does not exist, replace engine compartment fuse/relay box. NOTE: DO NOT use OBD-II Data Link Connector (OBD-II DLC) for lab scope power source as this will affect waveform.
6. Connect CMP sensor connector. Connect lab scope positive probe to ECM harness connector terminal No. 44 (Blue/Red wire). see scheme 7 Connect lab scope negative probe to ground. Set lab scope time to 50 milliseconds and voltage to 5 volts. Start engine and warm up to normal operating temperature. Allow engine to idle and compare CMP sensor waveform to normal CMP sensor waveform. (Scheme 32) If waveform is erratic, go to next step. If waveform is okay, wiggle wiring harness between ECM and CMP sensor while observing waveform. If waveform becomes broken or is eliminated while wiggling harness, repair wiring harness as necessary.
7. Turn ignition off. Remove CMP sensor mounting bracket. Check exhaust cam for sensor pin. If sensor pin is present, replace CMP sensor. If sensor pin is missing, replace exhaust cam.

Note. Indication of a good catalytic converter is front HO2S output voltage switches normally while rear HO2S output remains fairly flat. Indication of a weak catalytic converter is front HO2S output voltage switches normally and rear HO2S output voltage pattern is a lower amplitude imitation of the front HO2S.

Note. If any HO2S, fuel system or Evaporative Emissions (EVAP) system DTCs are present, repair those first.

1. Perform fuel pressure test, maximum fuel pressure test and fuel pressure hold test. See appropriate tests in FUEL PRESSURE under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure tests are within specifications, go to next step. If any fuel pressure test is not within specification, repair fuel system as necessary.
2. Perform fuel injector inspection and volume test. See FUEL INJECTORS under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If all fuel injectors are operating properly, go to next step. If any fuel injector is not operating properly, repair appropriate fuel injector.
3. Check vacuum hoses for leaks. Check PCV valve operation. See POSITIVE CRANKCASE VENTILATION (PCV) under EMISSIONS SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. Check purge solenoid valve for proper installation and operation. See FUEL EVAPORATION under EMISSIONS SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem exists, repair as necessary. If problem does not exist, go to next step.
4. Backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. see scheme 9 Start engine and allow it to warm-up to normal operating temperature. With engine idling, spray short spurts of aerosol carburetor cleaner into following areas while observing voltage changes: Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A long rise in voltage that corresponds to approximate timing and duration of spray of carburetor cleaner indicates air leak in area sprayed. If leak is indicated, repair leak as necessary. If no leak is indicated, go to next step.
5. With engine idling, have helper hold wadded rag against tailpipe. Listen for exhaust leaks between main catalytic converter and cylinder head. If exhaust leak is detected, repair as necessary.

Note. If any DTC(s) present or pending are related to MAF, ECT, FLS, IAT, DMTL or PSV repair those first. Using scan tool, clear DTCs. Drive vehicle with Hi-Scan Pro/Kia Data Pro scan connected to OBD-II Data Link Connector (OBD-II DLC) and monitor for pending codes. If DTC P0441, P0442 or P0445 returns, perform following procedure.

1. Inspect the fuel cap has its o-ring seal installed and is in good condition. Verify cap releases pressure/vacuum at specified value (about 2 psi pressure and 1.5 inches of mercury vacuum). If Fuel cap is in good working condition, go to next step. Fuel cap is not in good working condition, replace the fuel cap.
2. Inspect fuel filler pipe for cracks or damage inspect o-ring seat for deformation. If filler pipe is okay, go to next step. Filler pipe is damaged, replace fuel filler pipe.
3. Remove PSV and supply battery voltage to one terminal and negative to the other terminal. A slight clicking noise should be heard from the PSV. With light pressure blow air into one of the ports (Scheme 33) Check that air escapes from other port when energizing and de-energizing PSV. Purge solenoid valve is working properly, go to next step. PSV is not working properly, replace with known good PSV. If problem is corrected, replace PSV.
4. Install PSV and thoroughly check all fuel vapor lines and hose clamps between: Canister and rollover valve Canister and ORVR valve Canister and catcher tank Canister and DMTL Catcher tank and PSV PSV and intake manifold Verify arrow on PSV is pointing towards intake manifold. If it is not, reverse its installation. With system sealed and pressurized, check for leaks with a R134a leak detector. Vapor hoses and clamps are not okay, replace all cracked/damaged hoses or loose clamps. If vapor hoses and clamps are okay, temporarily install a good known DMTL and check for proper operation. If problem is corrected, replace DMTL and go to next step.
5. Return vehicle to original condition. Verify repairs are complete.

Scheme 33

1. Disconnect PSV 2-pin connector. Turn ignition on. Measure voltage between ground and PSV harness connector terminal No. 1 (color not available). If battery voltage exists, go to next step. If battery voltage does not exist, check INJ fuse (10-amp). If fuse is blown, locate and repair short, then replace fuse. If fuse is okay, repair open in wire between PSV and engine compartment fuse/relay box.
2. Turn ignition off. Measure resistance between PSV harness connector terminals (component side). Resistance should be 24-28 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace PSV.
3. Disconnect ECM 88-pin connector. Measure resistance of White/Black wire between PSV harness connector terminal No. 2 and ECM harness connector terminal No. 36. see scheme 7 If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in White/Black wire between PSV and ECM.
4. Check for continuity between ground and ECM harness connector terminal No. 36 (White/Black wire). If there is no continuity, go to next step. If there is continuity, repair short to ground in White/Black wire between PSV and ECM.
5. Turn ignition on. Measure voltage between ground and ECM harness connector terminal No. 36 (White/Black wire). If voltage exists, repair short to power in White/Black wire between PSV and ECM. If voltage does not exist, check connectors for loose, damaged or corroded terminals. If problem exists, repair as necessary at appropriate connector.

1. Remove rear seat disconnect the fuel pump module connector, measure resistance between the fuel pump harness connector terminal No. 2 and ECM harness connector terminal No. 82. See «FUEL PUMP WIRE COLORS»(ref-12016-S03770417152001081700000) table. see scheme 8 If measured resistance less than one ohm, go to next step. If not, check for open or high resistance in wire between fuel pump and ECM terminal No. 82. Inspect connectors for loose, damaged or corroded terminals. If problem exists, repair wiring harness and appropriate connector as necessary.
2. Measure resistance between the fuel pump harness connector terminal No. 2 and ground. If measured resistance is infinite, go to next step. If not, check for short to ground in wire between fuel pump and ECM harness connector terminal No. 82. Repair wiring harness as necessary.
3. Measure resistance between the fuel pump harness connector terminal No. 3 and ground. If measured resistance is less than one ohm, go to next step. If measured resistance is not less than one ohm, check for open or high resistance in wire between fuel pump harness connector terminal No. 3 and ground. Inspect connectors for loose, damaged or corroded terminals. If problem exists, repair wiring harness and as necessary appropriate connector as necessary.
4. Remove fuel pump unit from fuel tank, reconnect fuel pump connector. Turn ignition to on and observe low fuel indicator. If low fuel indicator illuminate, thoroughly inspect connectors for loose, damaged or corroded terminals between fuel pump and ECM. If problem exists, repair wiring harness and appropriate connector as necessary. If low fuel indicator does not illuminate, turn ignition off and jumper fuel pump terminal No. 2 and ground. Turn ignition on, observe low fuel indicator. If low fuel indicator does not illuminate, replace LFI bulb and retest.

FUEL PUMP WIRE COLORS

1. Turn ignition off. Check METER fuse (10-amp). If fuse is okay, go to next step. If fuse is blown, replace fuse and repair short to ground in circuit between fuse and VSS. See appropriate wiring diagram under WIRING DIAGRAMS in appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
2. Disconnect VSS 3-pin connector. Turn ignition on. If vehicle has automatic transaxle, measure voltage between ground and VSS harness connector terminal No. 1 (Yellow wire). see scheme 15 If vehicle has manual transaxle, measure voltage between ground and VSS harness connector terminal No. 3 (Yellow wire). see scheme 16 If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Yellow wire between METER fuse (10-amp) and VSS.
3. Turn ignition off. Measure resistance between ground and VSS harness connector terminal No. 2 (Black wire). If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Black wire between VSS and ground. Ground point is located below left side of instrument panel.
4. Connect VSS connector. Locate White 10-pin intermediate connector X-11 below instrument panel, to left of center console. Backprobe and connect positive lead of 2-channel lab scope to intermediate connector X-11 terminal No. 1 (Orange/Black wire). see scheme 12 Backprobe and connect negative lead of lab scope to intermediate connector X-11 terminal No. 9 (Green/Orange wire). Adjust time to 50 milliseconds. Adjust "A" and "B" voltages to 5 volts. Adjust patterns so they are stacked. Go to next step. NOTE: Upper waveform displayed on lab scope is VSS input into speedometer. Bottom waveform is VSS output from speedometer.
5. Raise vehicle on lift until tires are at least 6" off the floor. Start engine and shift into second gear. Compare waveforms generated at 5 MPH to normal and abnormal waveforms. (Scheme 34)- (Scheme 36). If waveform indicates short to power on speedometer VSS output side, go to next step. If waveform indicates short to ground on speedometer VSS output side, go to step 8. If waveform indicates short to power on speedometer VSS input side, go to step 11. If waveform indicates short to ground on speedometer VSS input side, go to step 12. If waveform is normal, check connectors for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector.
6. Turn ignition off. Disconnect lab scope leads from intermediate connector X-11. Remove instrument cluster and disconnect instrument cluster connector 12-pin connector C01. (Scheme 37) Disconnect ECM 88-pin connector, Transaxle Control Module (TCM) 88-pin connector (if applicable), and cruise control 10-pin connector (if applicable). Turn ignition on. Check for voltage at connector intermediate X-11 terminal No. 1 (Orange/Black wire). If voltage exists, repair short to power in Orange/Black wire between instrument cluster and ECM, TCM or cruise control. If voltage does not exist, go to next step.
7. Inspect printed circuit board for signs of shorting between instrument cluster connector C01 and speedometer. If problem exists, replace printed circuit board. If problem does not exist, replace speedometer, then return to step 4.
8. Turn ignition off. Remove lab scope leads from intermediate connector X-11. Remove instrument cluster and disconnect instrument cluster connector 12-pin connector C01. (Scheme 37) Disconnect ECM 88-pin connector, Transaxle Control Module (TCM) 88-pin connector (if applicable), and cruise control 10-pin connector (if applicable). Check for continuity between ground and intermediate connector X-11 terminal No. 1 (Orange/Black wire). If continuity exists, repair short to ground in Orange/Black wire between instrument cluster and ECM, TCM or cruise control module, then return to step 4. If continuity exists, go to next step.
9. Measure resistance of Orange/Black wire between instrument cluster connector C01 terminal No. 3 and ECM harness connector terminal No. 42. see scheme 7and see scheme 11. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Orange/Black wire between instrument cluster and ECM, then return to step 4.
10. Inspect printed circuit board for signs of opens between instrument cluster connector C01 and speedometer. If problem exists, replace printed circuit board. If problem does not exist, replace speedometer, then return to step 4.
11. Turn ignition off. Remove lab scope leads from intermediate connector X-11. Remove instrument cluster and disconnect instrument cluster connector 12-pin connector C01. (Scheme 37) Disconnect VSS 3-pin connector. Turn ignition on. Measure voltage between ground and instrument cluster connector C01 terminal No. 8 (Green/Orange wire). If voltage exists, repair short to power in Green/Orange wire between instrument cluster and VSS, then return to step 4. If voltage does not exist, replace VSS, then return to step 4.
12. Turn ignition off. Remove lab scope leads from intermediate connector X-11. Remove instrument cluster and disconnect instrument cluster connector 12-pin connector C01. (Scheme 37) Disconnect VSS 3-pin connector. Check for continuity between ground and instrument cluster connector C01 terminal No. 8 (Green/Orange wire). If continuity exists, repair short to ground in Green/Orange wire between instrument cluster and VSS, then return to step 4. If continuity does not exist, go to next step.
13. Measure resistance of Green/Orange wire between instrument cluster connector C01 terminal No. 8 and VSS harness connector terminal No. 1 (automatic transaxle) or No. 3 (manual transaxle). see scheme 11, see scheme 15 and see scheme 16. If resistance is less than one ohm, replace VSS, then return to step 4. If resistance is one ohm or more, repair open in Green/Orange wire between instrument cluster and VSS, then return to step 4.

Scheme 34

Scheme 35

Scheme 36

Scheme 37

1. Check accelerator free play. Free play should be.040-120" (1-3 mm). If free play is as specified, go to next step. If free play is not as specified, adjust accelerator cable.
2. Check for leaking or disconnected vacuum hoses. Also, check PCV valve and Purge Solenoid Valve (PSV) for proper installation and operation. See POSITIVE CRANKCASE VENTILATION (PCV) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. See FUEL EVAPORATION under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem exists, repair as necessary. If problem does not exist, go to next step.
3. Remove intake hose and inspect throttle plate for excessive carbon deposits. If throttle plate has carbon deposits, clean throttle plate with O2 sensor safe carburetor cleaner. If throttle plate does not have carbon deposits, go to next step.
4. Start engine and let idle. Backprobe and measure voltage (TP sensor output voltage) between ECM harness connector terminal No. 73 (Blue/Orange wire) and ground. see scheme 7 Voltage should be 400-600 millivolts. If voltage is as specified, go to next step. If voltage is not as specified, check TP sensor circuit. See «DTC P0123: THROTTLE POSITION (TP) SENSOR CIRCUIT HIGH INPUT»(ref-12016-S19249051912001080700000).
5. Turn ignition off. Disconnect IAC valve 3-pin connector. Measure resistance between IAC valve harness connector terminals No. 1 and 2 (White/Yellow wire and Red/Yellow wire - component side). see scheme 10 Also, measure resistance between IAC valve harness connector terminals No. 2 and 3 (Red/Yellow wire and White/Green wire - component side). Resistance should be 14-18 ohms at 68°F (20°C). If each resistance is as specified, go to next step. If either resistance is not as specified, replace IAC valve.
6. Remove IAC valve from throttle body. Check IAC valve for excessive carbon deposits. If problem exists, clean or replace IAC valve as necessary, then go to next step. If problem does not exist, go to next step.
7. Connect jumper wire between battery positive terminal and IAC valve harness connector terminal No. 2 (component side). Connect another jumper wire to ground. While observing for IAC valve movement, in turn, momentarily touch grounded jumper wire to IAC valve harness connector terminals No. 1 and 3. IAC valve should close when IAC valve harness connector terminal No. 1 is grounded. IAC valve should open when IAC valve harness connector terminal No. 3 is grounded. Repeat test several times to ensure reliability of results. If IAC valve reliably performs as specified, go to next step. If IAC valve does not reliably perform as specified, replace IAC valve.
8. Disconnect ECM 88-pin connector. Measure resistance of White/Yellow wire between IAC valve harness connector terminal No. 1 and ECM harness connector terminal No. 2. see scheme 7and see scheme 10. Also, measure resistance of White/Green wire between IAC valve harness connector terminal No. 3 and ECM harness connector terminal No. 29. If each resistance is less than one ohm, go to next step. If either resistance is one ohm or more, repair open in appropriate wire between IAC valve and ECM. CAUTION: DO NOT spray carburetor cleaner on or near coils or plug wires. Allow enough time between checking areas for carburetor spray to dissipate.
9. Connect all connectors. Start engine and allow it to reach normal operating temperature. With engine idling, backprobe and monitor voltage between front HO2S harness connector terminal No. 4 (Green/Brown wire) and ground. With engine idling, spray short bursts of aerosol carburetor cleaner in following areas while observing changes in front HO2S voltage: Throttle body gasket. Gasket between intake manifold and cylinder head. Gasket between intake manifold and surge tank. Seals between intake manifold and fuel injectors. Seal between surge tank and PCV pipe. A rise in voltage that lasts about as long as duration of carburetor cleaner spray indicates an intake leak. If a leak is indicated, repair as necessary.

Note. Vehicle will not run if IG COIL fuse (10-amp), INJ fuse (10-amp) or ECM B+ fuse (10-amp) is blown. If any of these fuses are blown, locate and repair short, then replace appropriate fuse before continuing diagnosis.

1. Check battery condition and generator output. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS. If problem does not exist, go to next step. If problem exists, repair as necessary. NOTE: Using a breakout box will make following tests easier.
2. Turn ignition on. Backprobe and measure voltage between ECM harness connector terminal No. 26 (Pink wire) and ground. see scheme 7 Also, backprobe and measure voltage between ECM harness connector terminal No. 54 (Red/Yellow wire) and ground. And backprobe and measure voltage between ECM harness connector terminal No. 58 (Yellow wire) and ground. If battery voltage exists at each terminal, go to next step. If battery voltage does not exist at a terminal, repair open in appropriate wire. See WIRING DIAGRAMS.
3. Drive vehicle while monitoring voltage at ECM harness connector terminals No. 26, 54 and 58. If voltage stays stable at battery voltage at each terminal, check connectors for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If voltage is unstable at a terminal, locate intermittent poor contact and repair as necessary. If voltage is unstable at ECM harness connector terminal No. 54, also check EGI main relay control circuit connections and wiring for intermittent poor contact. Repair as necessary. See WIRING DIAGRAMS.

1. . Check continuity of ECM B+ fuse (10-amp) in passenger compartment fuse box. If either fuse is blown, locate and repair short to ground in appropriate wire, then replace fuse. See POWER DISTRIBUTION article in WIRING DIAGRAMS. If fuse is okay, go to next step.
2. Backprobe and measure voltage between ECM harness connector terminal No. 26 (Pink wire) and ground. see scheme 7 If battery voltage exists, replace ECM. If battery voltage does not exist, go to next step.
3. Check open in Pink wire between ECM and passenger compartment fuse box. Inspect connectors for loose, damaged or corroded terminals. If problem exists, repair wiring harness and appropriate connector as necessary.

1. Turn ignition on, measure voltage between ECM terminal No. 8 (Brown/White) wire and ground. If voltage is less than one volt, go to next STEP. If battery voltage is not as specification, check for short to battery voltage between instrument cluster C01-C1 (Orange/Black wire) at instrument panel connector, and ECM terminal No. 8, locate and repair short as necessary.
2. Turn ignition off, disconnect instrument cluster Measure resistance between instrument cluster C01-C1 (Orange/Black wire) at instrument panel connector and ground (infinite resistance). If continuity does not exist go to next step. If continuity does exist, repair short to ground in wire harness between instrument cluster C01-C1 (Orange/Black wire) and ECM terminal No. 8 (Brown/White) wire.
3. Measure resistance between instrument cluster C01-C1 (Orange/Black wire) at instrument panel connector and ECM harness connector terminal No. 8. see scheme 7 If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in instrument cluster C01-C1 (Orange/Black wire) and ECM terminal No. 8 (Brown/White) wire.
4. Check MIL in instrument cluster for operation, MIL operates correctly, check connectors for loose, damaged, corroded or misplaced terminals at MIL or ECM. If problem exists, repair as necessary appropriate connector. If MIL does not operate correctly, replace malfunction indicator light and retest.

Note. Using scan tool, clear DTCs. Drive vehicle with Kia Data Pro connected to OBD-II Data Link Connector (OBD-II DLC) and monitor for pending codes. If DTC P1308 or P1309 returns, perform following procedure.

1. Turn ignition off. Disconnect CAS 3-pin connector. Disconnect ECM 88-pin connector. Measure resistance of Red/Black wire between CAS harness connector terminal No. 3 and ECM harness connector terminal No. 80. see scheme 3and see scheme 7. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Red/Black wire between CAS and ECM.
2. Check for continuity between ground and CAS harness connector terminal No. 3 (Red/Black wire). If continuity exists, repair short to ground in Red/Black wire between CAS and ECM. If continuity does not exist, go to next step.
3. Measure resistance of Black/Green wire between CAS harness connector terminal No. 2 and ECM harness connector terminal No. 71. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair open in Black/Green wire between CAS and ECM.
4. Turn ignition on. Check for voltage between ground and CAS harness connector terminal No. 3 (Red/Black wire). If voltage exists, repair short to power in Red/Black wire between CAS and ECM. If voltage does not exist, go to next step.
5. Turn ignition off. Connect ECM connector. Turn ignition on. Measure voltage between ground and CAS harness connector terminal No. 1 (Blue/White wire). see scheme 3 Voltage should be about 5 volts. If voltage is as specified, go to next step. If voltage is not as specified, repair open or short to power in Blue/White wire between CAS and engine compartment fuse/relay box.
6. Turn ignition off. Remove CAS from vehicle and connect connector to CAS. Turn ignition on. Holding CAS still, backprobe and measure voltage between ECM harness connector terminal No. 80 (Red/Black wire) and ground. see scheme 7 Voltage should be about 2.5 volts. Hold CAS with base parallel to floor and briskly shake CAS up and down. Voltage should quickly vary between.1-5 volts. If CAS voltage is not as specified, replace CAS. If CAS voltage is as specified, go to next step.
7. Check connectors for loose, damaged or corroded terminals. If problem exists, repair connectors as needed, then test drive vehicle. If problem does not exist, test drive vehicle. If pending DTC P1307 appears during drive, check Vehicle Speed Sensor (VSS) wiring. See appropriate wiring diagram in appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. If problem exists, repair as necessary.

Note. Record all freeze frame data before disconnecting any connectors or clearing DTCs.

1. Turn ignition off. Disconnect ECM 88-pin connector. Check for continuity between ECM harness connector terminals No. 70 and 71 (Yellow/Blue wire and Black/Green wire). see scheme 7 If continuity does not exist, go to next step. If continuity exists, go to step 3.
2. Check for continuity between ground and ECM harness connector terminals No. 70 (Yellow/Blue wire) and No. 71 (Black/Green wire). see scheme 7 If continuity exists between ground and either terminal, repair short to ground in appropriate wire between knock sensor and ECM. If continuity does not exist between ground and either terminal, check connectors for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If problem does not exist, replace knock sensor.
3. Disconnect knock sensor connector. Check for continuity between ECM harness connector terminals No. 70 and 71 (Yellow/Blue wire and Black/Green wire). If continuity exists, repair shorted wires between knock sensor and ECM. If continuity does not exist, replace knock sensor.
4. Measure resistance between terminals No. 1 and 2 on Knock sensor, resistance should be 4.32 - 5.28 milliohms. If resistance is as specified, check for loose, bent, poor connection or corroded terminals. Repair as necessary. If resistance is not as specified, replace Knock sensor.

1. Disconnect 4 pin leak detection pump connector, turn ignition to ON, measure voltage between ground and leak detection pump harness connector terminal No. 3 (Red/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, measure voltage between ground and engine compartment fuse/relay box harness connector terminal No. F1 (Red/Yellow wire). Inspect condition of fuse (10 amp). If battery voltage exists, repair open or short to ground in wire between battery fuse/relay box and leak detection pump. If battery voltage does not exist, replace engine compartment fuse/relay box and retest system.
2. Ignition off, Disconnect ECM connector and measure resistance between ECM harness terminal No. 18 (to ECM) and ground. Resistance should be less than one ohm. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair Light Green/Black wire for short to ground between leak detection pump and ECM terminal No. 18.
3. Ignition off, and reconnect LDP module connector. Turn ignition on and measure voltage between LDP module terminal No. 1 (Red/Black) wire and ground (B+). Battery voltage is present, go to next step. Battery voltage is not present, check for poor connection at LDP module. If okay, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
4. Turn ignition off. Measure resistance between leak detection pump harness connector terminals No. 1 and 3 (Pink/Yellow wire and Black/Yellow wire - component side). Resistance should be 30-32 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
5. Turn ignition on. Check for voltage between ECM harness connector terminal No. 18 (Red/Yellow wire) and ground (B+). If voltage does not exist, check for open between LDP and ECM terminal No. 18. Repair as necessary. If voltage exists, return vehicle to original condition. Verify repairs are complete.

1. Disconnect 4 pin leak detection pump connector, turn ignition to ON, measure voltage between ground and leak detection pump harness connector terminal No. 3 (Red/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, measure voltage between ground and engine compartment fuse/relay box harness connector terminal No. F1 (Red/Yellow wire). Inspect condition of fuse (10 amp). If battery voltage exists, repair open or short to ground in wire between battery fuse/relay box and leak detection pump. If battery voltage does not exist, replace engine compartment fuse/relay box and retest system.
2. Ignition off, Disconnect ECM connector and measure resistance between ECM harness terminal No. 20 (to ECM) and ground. Resistance should be less than one ohm. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, check Light Green/Black wire for short to ground between leak detection pump and ECM terminal No. 20. Repair as necessary.
3. Ignition off and reconnect LDP module connector. Turn ignition on. Check for voltage between LDP module terminal No. 2 (Light Green/Yellow wire) and ground (B+). If voltage exist, go to next step. If voltage does not exists, check for poor connection at LDP module. If okay, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
4. Turn ignition off. Measure resistance between leak detection pump harness connector terminals No. 2 and 3 (Light Green/Yellow wire and Pink/Yellow wire - component side). Resistance should be 117-119 ohms at 68°F (20°C). If resistance is as specified, check connectors for loose, damaged or corroded terminals. If problem exists, repair connectors as necessary. Go to next. If resistance is not as specified, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
5. Ignition off and reconnect LDP module connector. Turn ignition on. Check for voltage between ECM harness connector terminal No. 20 (Red/Yellow wire) and ground (B+). If voltage does not exist, check for open between LDP and ECM terminal No. 20. Repair as necessary. If voltage exists, return vehicle to original condition. Verify repairs are complete.

1. Disconnect 4 pin leak detection pump connector, turn ignition to ON, measure voltage between ground and leak detection pump harness connector terminal No. 3 (Red/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, measure voltage between ground and engine compartment fuse/relay box harness connector terminal No. F1 (Red/Yellow wire). Inspect condition of fuse (10 amp). If battery voltage exists, repair open or short to ground in wire between battery fuse/relay box and leak detection pump. If battery voltage does not exist, replace engine compartment fuse/relay box and retest system.
2. Ignition off, Disconnect ECM connector and measure resistance between ECM harness terminal No. 9 (to ECM) and ground. Resistance should be less than one ohm. If resistance is less than one ohm, go to next step. If resistance is one ohm or more, repair Light Green/Black wire for short to ground between leak detection pump and ECM terminal No. 9.
3. Ignition off, and reconnect LDP module connector. Turn ignition on and measure voltage between LDP module terminal No. 4 (Red/Black) wire and ground (B+). Battery voltage is present, go to next step. Battery voltage is not present, check for poor connection at LDP module. Repair as necessary. If connection is okay, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
4. Turn ignition on. Check for voltage between ground and ECM connector harness terminal No. 9 (Light Green/Black) wire. If voltage does not exist, go to next step. If voltage exists, repair open to power in Light Green/Black wire between leak detection pump and ECM terminal No. 9. Repair as necessary.
5. Ignition off and remove LDP module. Apply battery voltage to LDP terminal No. 3, and ground (-) to Terminal No. 4 for 10-20 minutes (.3 amps current). Verify LDP heater temperature increases. If yes, go to next step. If no, replace leak detection pump with known good unit. If problem is corrected, replace LDP module.
6. Return vehicle to original condition. Verify repairs are complete.

1. Turn ignition on. Set A/C switch off and blower switch to No. 1 position. Backprobe and measure voltage between ECM harness connector terminal No. 64 (Gray/Red wire) and ground. see scheme 7 If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, check for short to ground or short to power in wire between A/C switch terminal No. 2 (Green/Orange wire) and ECM terminal No. 64 (Gray/Red wire). see scheme 2 See wiring diagram in appropriate MANUAL A/C-HEATER SYSTEMS article. Also, check A/C switch for internal short. If problem exists, repair as necessary.
2. Turn A/C switch on. Backprobe and measure voltage between ECM harness connector terminal No. 64 (Gray/Red wire) and ground. If voltage does not exist, go to next step. If voltage exists, repair open in wire(s) or connector(s) between grounding junction connector No. 20 and ECM harness connector terminal No. 64. Check for open or short to battery in wire between A/C switch terminal No. 2 (Green/Orange wire) and ECM harness connector terminal No. 64 (Gray/Red wire). Repair wiring as necessary.
3. Turn A/C switch and blower switch off. Leave ignition on. Backprobe and measure voltage between ECM harness connector terminal No. 65 (Brown/Yellow wire) and ground. If voltage is about 5 volts, check for intermittent short between A/C thermostat harness connector terminal No. 2 (Black/Red wire) and ECM harness connector terminal No. 65 (Brown/Yellow wire). If problem exists, repair as necessary. If voltage is 8-9 volts, verify A/C switch is off. If A/C switch is on, turn A/C switch off and repeat step 3. If A/C switch is off, check for shorted A/C switch. If problem exist, replace A/C switch. If voltage is about zero volts, check for shorted A/C thermostat. If problem exists, replace A/C thermostat. If problem does not exist, repair short to ground in wire between A/C thermostat terminal No. 2 and ECM harness connector terminal No. 65.

1. Turn ignition off. Disconnect IAC valve 3-pin connector. Turn ignition on. Measure voltage between ground and IAC valve harness connector terminal No. 2 (Red/Yellow wire). see scheme 10 If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red/Yellow wire between IAC valve connector and INJ fuse (10-amp), located in engine compartment fuse/relay box.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of White/Green wire between IAC valve harness connector terminal No. 3 and ECM harness connector terminal No. 29. see scheme 7and see scheme 10. If code is DTC P1505 and resistance is less than one ohm, go to next step. If code is DTC P1506 and resistance is less than one ohm, go to step 4. If resistance is not as specified, repair open in White/Green wire between IAC valve and ECM.
3. Check for continuity between ground and ECM harness connector terminal No. 29 (White/Green wire). If continuity does not exist, go to step 5. If continuity exists, repair short to ground in White/Green wire between IAC valve and ECM.
4. Turn ignition on. Check for voltage between ground and ECM harness connector terminal No. 29 (White/Green wire). If voltage does not exist, go to next step. If voltage exists, repair short to power in White/Green wire between IAC valve and ECM.
5. Turn ignition off. Measure resistance between IAC valve harness connector terminals No. 1 and 2 (White/Yellow wire and Red/Yellow wire - component side). Also, measure resistance between IAC valve harness connector terminals No. 2 and 3 (Red/Yellow wire and White/Green wire - component side). Resistance should be 16.5-18.5 ohms at 68°F (20°C). If resistance is not as specified, replace IAC valve. If resistance is as specified, check connectors for loose, damaged or corroded terminals. If problem exists, repair connector as necessary.

1. Turn ignition off. Disconnect IAC valve 3-pin connector. Turn ignition on. Measure voltage between ground and IAC valve harness connector terminal No. 2 (Red/Yellow wire). see scheme 10 If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red/Yellow wire between engine compartment fuse/relay box and IAC valve.
2. Turn ignition off. Disconnect ECM 88-pin connector. Measure resistance of White/Yellow wire between IAC valve harness connector terminal No. 1 and ECM harness connector terminal No. 2. see scheme 7and see scheme 10. If code is DTC P1507 and resistance is less than one ohm, go to next step. If code is DTC P1508 and resistance is less than one ohm, go to step 4. If resistance is not as specified, repair open in White/Yellow wire between IAC valve and ECM.
3. Check for continuity between ground and ECM harness connector terminal No. 2 (White/Yellow wire). If continuity does not exist, go to step 5. If continuity exists, repair short to ground in White/Yellow wire between IAC valve and ECM.
4. Turn ignition on. Check for voltage between ground and ECM harness connector terminal No. 2 (White/Yellow wire). If voltage does not exist, go to next step. If voltage exists, repair short to power in White/Yellow wire between IAC valve and ECM.
5. Turn ignition off. Measure resistance between IAC valve harness connector terminals No. 1 and 2 (White/Yellow wire and Red/Yellow wire - component side). see scheme 10 Also, measure resistance between IAC valve harness connector terminals No. 2 and 3 (Red/Yellow wire and White/Green wire - component side). Resistance should be 14.5-16.5 ohms at 68°F (20°C). If resistance is not as specified, replace IAC valve. If resistance is as specified, check connectors for loose, damaged or corroded terminals. If problem exists, repair connector as necessary.

Note. Record all freeze frame data before disconnecting connectors or clearing codes.

1. On manual transaxle, go to step 4. On automatic transaxle, turn ignition off. Disconnect ECM 88-pin connector. Measure resistance between ground and ECM harness connector terminal No. 72 (Black/Yellow wire). Resistance should be 0 ohms. see scheme 7 If resistance is as specified, go to step 3. If resistance is not as specified, repair open circuit between ECM connector and ground. Connect ground wire to ECM harness connector terminal No. 72.
2. Connect ECM connector. Put gear selector in "D" and measure resistance between ground and ECM harness connector terminal No. 86 (Red/Yellow wire). Resistance should be 0 ohms. If resistance is not as specified, go to next step. If resistance is as specified, check for short to ground between ECM harness connector terminal No. 86 (Red/Yellow wire) and ground. Repair wiring as necessary.
3. Disconnect ECM, place transmission in Park range. Start engine and measure voltage between ground and ECM harness connector terminal No. 86 (Red/Yellow wire). Voltage should be about 8-13 volts. If voltage is as specified, check connectors for loose, damaged or corroded terminals. If problem exists, repair wiring harness and appropriate connector as necessary. If voltage is not as specified, check for open between ECM harness connector terminal No. 86 (Red/Yellow wire) and engine compartment fuse/relay box terminal F7. see scheme 7 Inspect condition of fuse, repair open circuit as necessary.
4. For (M/T) turn ignition off. Disconnect ECM 88-pin connector. Measure resistance between ground and ECM harness connector terminal No. 72 (Black/Yellow) wire. Resistance should be 0 ohms. see scheme 7 If resistance is not 0 ohms, go to next step. If resistance is 0 ohms, check engine harness part number to ensure proper harness is in vehicle. It part number is okay, create an open circuit between ECM terminal 72 and ground. Cut wire at ECM harness connector terminal No. 72.
5. Measure resistance between ground and ECM harness connector terminal No. 86 (Red/Yellow wire). Resistance should be 0 ohms, if resistance is 0 ohms, Check connectors for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If resistance is not as specified, repair open by connecting a ground wire between ECM harness connector terminal No. 86 and ground (M/T only).

1. If DTC is P1614, go to step 4. If DTC is 1611, turn ignition off. Disconnect TCM 88-pin connector and ECM 88-pin connector. Check for continuity between ground and TCM harness connector terminal No. 27 (White/Blue or Yellow/Blue wire). see scheme 7 If continuity does not exist, go to step 3. If continuity exists, repair short to ground in White/Blue wire or Yellow/Blue wire between ECM and TCM.
2. Turn ignition off. Disconnect TCM 88-pin connector and ECM 88-pin connector. Measure resistance of circuit between TCM harness connector terminal No. 27 (White/Blue wire) and ECM harness connector terminal No. 61 (Yellow/Blue wire). If resistance is less than one ohm, go to next step. If resistance is more than one ohm repair open in White/Blue wire between TCM and engine compartment fuse/relay box or Yellow/Blue wire between engine compartment fuse/relay box and ECM.
3. Turn ignition on. Check for voltage between ground and ECM harness connector terminal No. 61 (Yellow/Blue wire). If voltage does not exist, Repair open or short at ECM terminal No. 61. If voltage exists, check for poor or loose connection at ECM connector. Repair as necessary.
4. For DTC P1614 Turn ignition off. Backprobe and connect DVOM positive lead to ECM harness connector terminal No. 61 (Yellow/Blue wire). Connect DVOM negative lead to ground. While monitoring DVOM (MIL circuit voltage), turn ignition on. When ignition is turned on, voltage should cycle from 10-11 volts approximately every 1.5 seconds. If voltages are as specified, check connectors at ECM for loose, damaged or corroded terminals. If problem exists, repair as necessary appropriate connector. If voltages are not as specified, go to next step.
5. For vehicle with automatic transmission, check for short to battery at ECM terminal No. 61. see scheme 7 Repair as necessary. For vehicle with manual transmission inspect according to DTC P1586. See «DTC P1586: AUTOMATIC TRANSAXLE (A/T) OR MANUAL TRANSAXLE (M/T) CODIFICATION»(ref-12016-S09083033092001080700000).

Using scan tool, retrieve DTCs set by TCM. Follow repair procedure for TCM DTCs. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.

Note. If Light Green/Black wire between engine cooling fan relay and ECM is shorted to ground, cooling fan will run whenever ignition is on.

1. Ignition switch ON, measure voltage at ECM terminals No. 22 and ground (approx. 12 volts). Voltage is within specification, go to next step. Voltage is not within specification, go to step 3. see scheme 6and see scheme 7.
2. Turn ignition off. Remove cooling fan relay from engine compartment fuse/relay box. Measure resistance between cooling fan relay terminals No. 2 and 4 (across coil winding and resistor). (Scheme 38) Resistance should be about 80 ohms at 68°F (20°C). If resistance is as specified, check for poor or loose connection at ECM terminal No. 22. If resistance is not as specified, replace cooling fan relay. Go to step 4.
3. Turn ignition off. Remove cooling fan relay from engine compartment fuse/relay box. Measure resistance between harness terminal No. 14 and ground. Measured resistance is 0 ohms, repair short to ground between cooling fan terminal 14 and ECM terminal No. 22. If no, open between cooling fan terminal 14 and ECM terminal No. 22. Repair as necessary. Go to next step
4. Test drive vehicle. Verify repair has been completed. Test drive vehicle.

Scheme 38