Engine Control System (Diagnostic Codes (P0010-P0339)): Diagnosis

INSPECTION PROCEDURE

HINT

If DTC P0010 is displayed, check the intake camshaft circuit for the right bank VVT system.
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0020 is displayed, check the intake camshaft circuit for the left bank VVT system.
Bank 2 refers to the bank that does not include cylinder No. 1.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

Scheme 228

Scheme 228: PROCEDURE

PERFORM ACTIVE TEST USING CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. On the Techstream, enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) OK --> See step 5 NG: Go to next step
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Disconnect the B8 or B6 OCV connector. Measure the resistance between the terminals of the OCV. Standard resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Reconnect the OCV connector. NG --> See step 6 OK: Go to next step
CHECK HARNESS AND CONNECTOR (OCV - ECM) Disconnect the B8 or B6 OCV connector. Disconnect the B12 ECM connector. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition OC1+ (B12-58) - B8-1 Below 1 ohms OC1- (B12-57) - B8-2 Below 1 ohms OC2+ (B12-52) - B6-1 Below 1 ohms OC2- (B12-51) - B6-2 Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition OC1+ (B12-58) or B8-1 - Body ground 10 kohms or higher OC1- (B12-57) or B8-2 - Body ground 10 kohms or higher OC2+ (B12-52) or B6-1 - Body ground 10 kohms or higher OC2- (B12-51) or B6-2 - Body ground 10 kohms or higher Reconnect the OCV connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
CHECK FOR INTERMITTENT PROBLEMS. Refer to «PROBLEM SYMPTOMS TABLE»(ref-396630-S03331147362011050900000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY. Refer to «COMPONENTS»(ref-396635-S15366317692011050900000)

HINT

Abnormal bank	Advanced timing over (Valve timing is out of specified range)	Retarded timing over (Valve timing is out of specified range)
Bank 1	P0011	P0012
Bank 2	P0021	P0022

If DTC P0011 or P0012 is displayed, check the right bank VVT system for intake camshaft circuit (bank 1).
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0021 or P0022 is displayed, check the intake camshaft circuit for the left bank VVT system (bank 2).
Bank 2 refers to the bank that does not include cylinder No. 1.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

Scheme 229

Scheme 229: PROCEDURE

Scheme 230

Scheme 231

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P0011, P0012, P0021 and/or P0022 A P0011, P0012, P0021 and/or P0022 and other DTCs B HINT: If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first. B --> See step 8 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream. OK Techstream Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs using the Techstream. OK No pending DTC output. OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Remove the cylinder head covers RH and LH. Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), then align the marks as above. OK The timing marks on the camshaft timing gears are aligned as shown in the illustration. Reinstall the cylinder head covers. NG --> ADJUST VALVE TIMING OK: Go to next step
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the OCV. Measure the resistance between the terminals of the OCV. Standard resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Connect the positive battery terminal to terminal 1 and connect the negative battery terminal to terminal 2. Check valve operation. OK Valve moves quickly. Reinstall the OCV. NG --> See step 9 OK: Go to next step
INSPECT OIL CONTROL VALVE FILTER AND PIPE Remove the oil pipe No. 1 or No. 2. Remove the oil control valve filter. Check that the filter and pipe are not clogged. OK The filter and pipe are not clogged. NG --> REPLACE OIL CONTROL VALVE FILTER OR PIPE OK: Go to next step
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (FOR INTAKE CAMSHAFT) NEXT: Go to next step
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396630-S19862863392011050900000)
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT). Refer to «COMPONENTS»(ref-396635-S15366317692011050900000)
CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs using the Techstream. OK No pending DTC output. HINT: DTC P0011, P0012, P0021 or P0022 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even system returns to normal after a short time. Foreign objects are filtered out by the oil filter. OK --> END NG: Go to next step
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

If DTC P0013 is displayed, check the exhaust camshaft circuit for the bank 1 VVT system.
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0023 is displayed, check the exhaust camshaft circuit for the bank 2 VVT system.
Bank 2 refers to the bank that does not include cylinder No. 1.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

HINT

Abnormal bank	Advanced timing over (Valve timing is out of specified range)	Retarded timing over (Valve timing is out of specified range)
Bank 1	P0014	P0015
Bank 2	P0024	P0025

If DTC P0014 or P0015 is displayed, check the exhaust camshaft circuit for the bank 1 VVT system.
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0024 or P0025 is displayed, check the exhaust camshaft circuit for the bank 2 VVT system.
Bank 2 refers to the bank that does not include cylinder No. 1.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to FREEZE FRAME DATA .

Scheme 232

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 OR P0018) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P0016 or P0018 A P0016 or P0018 and other DTCs B HINT: If any DTCs other than P0016 or P0018 are output, troubleshoot those DTCs first. B --> GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-396630-S19862863392011050900000) A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OIL CONTROL VALVE FOR INTAKE CAMSHAFT) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine. Select the following menu items: Powertrain / Engine / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2). Check the engine speed while operating the oil control valve using the Techstream. OK Techstream Operation Specified Condition OFF Normal engine idle speed ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON) NG --> See step 4 OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0018) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs using the Techstream. OK No pending DTC output. OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) Remove the cylinder head covers RH and LH. Turn the crankshaft to align the timing marks of the crankshaft. Align the notch of the crankshaft pulley to the "0" position. Check if the timing marks of the camshaft pulley and camshaft bearing cap align. Turn the crankshaft clockwise by 360° if the timing marks do not align. Check if they align once again. OK The timing marks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position. NG --> ADJUST VALVE TIMING OK: Go to next step
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Remove the OCV. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms Connect the positive battery terminal to terminal 1 and connect the negative battery terminal to terminal 2. Check the valve operation. OK Valve moves quickly. Reinstall the OCV. NG --> REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY OK: Go to next step
INSPECT OIL CONTROL VALVE FILTER AND PIPE Remove the oil pipe No. 1 or oil pipe assembly. Remove the oil control valve filter. Check that the filter and pipe are not clogged. OK The filter and pipe are not clogged. NG --> REPLACE OIL CONTROL VALVE FILTER OR PIPE OK: Go to next step
REPLACE INTAKE CAMSHAFT TIMING GEAR ASSEMBLY NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTC. OK No pending DTC output. HINT: DTC P0016 or P0018 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay output even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem. OK --> END NG: Go to next step
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

Scheme 233

Scheme 233: PROCEDURE

Scheme 234

Scheme 235

Scheme 236

INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the B3 or B4 A/F sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 1) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 1.8 to 3.4 ohms HT (1) - AF- (4) - 10 kohms or higher Standard resistance (Bank 2 sensor 1) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 1.8 to 3.4 ohms HT (1) - AF- (4) - 10 kohms or higher Reconnect the A/F sensor connector. NG --> See step 10 OK: Go to next step
CHECK TERMINAL VOLTAGE (+B OF A/F SENSOR) Disconnect the B3 or B4 A/F sensor connector. Turn the engine switch on (IG). Measure the voltage between the terminals of the A/F sensor connector and body ground. Standard voltage Tester Connection Specified Condition +B (B3-2) - Body ground 9 to 14 V +B (B4-2) - Body ground 9 to 14 V OK --> See step 8 NG: Go to next step
INSPECT FUSE (A/F) Remove the A/F sensor fuse from the engine room junction block. Measure the A/F sensor fuse resistance. Standard resistance Below 1 ohms Reinstall the A/F fuse. NG --> REPLACE A/F FUSE OK: Go to next step
INSPECT ENGINE ROOM JUNCTION BLOCK (EFI RELAY, A/F RELAY) Remove the engine room junction block from the engine room R/B. Inspect the EFI relay. Measure the EFI relay resistance. Standard resistance Tester Connection Specified Condition 1E-12 - 1E-6 10 kohms or higher 1E-12 - 1E-6 Below 1 ohms (Apply battery voltage between terminals 1E-9 and 1E-10) Inspect the A/F relay. Measure the A/F relay resistance. Standard resistance Tester Connection Specified Condition 1G-1 - 1A-4 10 kohms or higher 1G-1 - 1A-4 Below 1 ohms (Apply battery voltage between terminals 1E-6 and 1E-11) NG --> REPLACE ENGINE ROOM JUNCTION BLOCK OK: Go to next step
INSPECT FUSE (EFI MAIN) Remove the EFI MAIN fuse from the engine room R/B. Measure the EFI MAIN fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI MAIN fuse. NG --> REPLACE EFI MAIN FUSE OK: Go to next step
CHECK HARNESS AND CONNECTOR (A/F SENSOR - A/F RELAY) Disconnect the B3 or B4 A/F sensor connector. Remove the engine room junction block from the engine room R/B. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition +B (B3-2) - 1A-4 (Engine room R/B) Below 1 ohms +B (B4-2) - 1A-4 (Engine room R/B) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition +B (B3-2) or 1A-4 (Engine room R/B) - Body ground 10 kohms or higher +B (B4-2) or 1A-4 (Engine room R/B) - Body ground 10 kohms or higher Reinstall the engine room junction block. Reconnect the A/F sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-396633-S13415458362011050900000)
CHECK HARNESS AND CONNECTOR Disconnect the B3 or B4 A/F sensor connector. Disconnect the B12 ECM connector. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition HA1A (B12-86) - HT (B3-1) Below 1 ohms HA2A (B12-109) - HT (B4-1) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition HA1A (B12-86) or HT (B3-1) - Body ground 10 kohms or higher HA2A (B12-109) or HT (B4-1) - Body ground 10 kohms or higher Reconnect the ECM connector. Reconnect the A/F sensor connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to No output A P0031, P0032, P0051 and/or P0052 B B --> See step 11 A: CHECK FOR INTERMITTENT PROBLEMS
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-396640-S01703233552011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

Scheme 237

Scheme 237: PROCEDURE

Scheme 238

Scheme 239

Scheme 240

INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the B24 heated oxygen sensor connector (Bank 1 Sensor 2) or B25 heated oxygen sensor connector (Bank 2 Sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 11 to 16 ohms HT (1) - E (4) Always 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 11 to 16 ohms HT (1) - E (4) Always 10 kohms or higher Reconnect the HO2 sensor connector. NG --> See step 10 OK: Go to next step
CHECK TERMINAL VOLTAGE (+B OF HO2 SENSOR) Disconnect the B24 heated oxygen sensor connector (Bank 1 Sensor 2) or B25 heated oxygen sensor connector (Bank 2 Sensor 2). Turn the engine switch on (IG). Measure the voltage between the terminals. Standard voltage Tester Connection Specified Condition +B (B24-2) - Body ground 9 to 11 V +B (B25-2) - Body ground 9 to 11 V Reconnect the HO2 sensor connector. OK --> See step 7 NG: Go to next step
INSPECT FUSE (EFI NO. 3) Remove the EFI No. 3 fuse from the engine room R/B. Measure the EFI No. 3 fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI No. 3 fuse. NG --> REPLACE EFI NO. 3 FUSE OK: Go to next step
INSPECT ENGINE ROOM JUNCTION BLOCK Remove the engine room junction block from the engine room R/B. Inspect the EFI relay. Measure the EFI relay resistance. Standard resistance Tester Connection Specified Condition 1E-12 - 1E-6 10 kohms or higher 1E-12 - 1E-6 Below 1 ohms (Apply battery voltage between terminals 1E-9 and 1E-10) Reinstall the engine room junction block. NG --> REPLACE ENGINE ROOM JUNCTION BLOCK OK: Go to next step
INSPECT FUSE (EFI MAIN) Remove the EFI MAIN fuse from the engine room R/B. Measure the EFI MAIN fuse. Standard resistance Below 1 ohms Reinstall the EFI MAIN fuse. NG --> REPLACE EFI MAIN FUSE OK: Go to next step
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - EFI RELAY) Disconnect the B24 or B25 heated oxygen sensor connector. Remove the engine room junction block from the engine room R/B. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition +B (B24-2) - 1E-6 (Engine room R/B) Below 1 ohms +B (B25-2) - 1E-6 (Engine room R/B) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition +B (B24-2) or 1E-6 (Engine room R/B) - Body ground 10 kohms or higher +B (B25-2) or 1E-6 (Engine room R/B) - Body ground 10 kohms or higher Reinstall the engine room junction block. Reconnect the HO2 sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> CHECK ECM POWER SOURCE CIRCUIT
CHECK HARNESS AND CONNECTOR (HO2 SENSOR - ECM) Disconnect the B24 heated oxygen sensor connector (Bank 1 Sensor 2) or B25 heated oxygen sensor connector (Bank 2 Sensor 2). Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Terminal Connection Specified Condition +B (B24-2) - Body ground 9 to 14 V +B (B25-2) - Body ground 9 to 14 V Turn the engine switch off. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Terminal Connection Specified Condition HT (B24-1) - HT1B (B12-48) Below 1 ohms OX (B24-3) - OX1B (B12-88) Below 1 ohms E (B24-4) - EX1B (B12-65) Below 1 ohms HT (B25-1) - HT2B (B12-47) Below 1 ohms OX (B25-3) - OX2B (B12-87) Below 1 ohms E (B25-4) - EX2B (B12-64) Below 1 ohms Standard resistance (Check for short) Terminal Connection Specified Condition HT (B24-1) or HT1B (B12-48) - Body ground 10 kohms or higher OX (B24-3) or OX1B (B12-88) - Body ground 10 kohms or higher E (B24-4) or EX1B (B12-65) - Body ground 10 kohms or higher HT (B25-1) or HT2B (B12-47) - Body ground 10 kohms or higher OX (B25-3) or OX2B (B12-87) - Body ground 10 kohms or higher E (B25-4) or EX2B (B12-64) - Body ground 10 kohms or higher Reconnect the HO2 sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK WHETHER DTC OUTPUT RECURS Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. Select the following menu items: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Display (DTC Output) Proceed to No output A P0037, P0038, P0057, P0058, P0141 and/or P0161 B B --> See step 11 A: Go to next step
CHECK FOR INTERMITTENT PROBLEMS. Refer to «PROBLEM SYMPTOMS TABLE»(ref-396630-S03331147362011050900000)
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-396640-S17554594272011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

Read freeze frame data using the Techstream. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

HINT

Scheme 241

Scheme 241: PROCEDURE

READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTC. Result Display (DTC Output) Proceed to P0102 A P0103 B B --> See step 8 A: Go to next step
INSPECT MASS AIR FLOW METER (POWER SOURCE VOLTAGE) Disconnect the B33 mass air flow (MAF) meter connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition +B (B33-3) - Body ground 9 to 14 V Reconnect the MAF meter connector. NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B33 MAF meter connector. Disconnect the B12 ECM connector. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition VG (B12-72) - VG (B33-5) Below 1 ohms E2G (B12-73) - E2G (B33-4) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition VG (B12-72) or VG (B33-5) - Body ground 10 kohms or higher Reconnect the MAF meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT MASS AIR FLOW METER Perform On-vehicle Inspection. Refer to «ON-VEHICLE INSPECTION»(ref-396635-S31956441732011050900000) . Inspect the function of the mass air flow meter. Remove the mass air flow meter with the connector connected. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / MAF. Blow air to the mass air flow meter and check that the intake air amount reading changes. OK The reading changes. NG --> See step 10 OK: REPLACE ECM
INSPECT FUSE (EFI NO. 3) Remove the EFI No. 3 fuse from the engine room relay block. Measure the EFI No. 3 fuse resistance. Standard resistance Below 1 ohms Reinstall the EFI No. 3 fuse. NG --> REPLACE EFI NO. 3 FUSE OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ENGINE ROOM JUNCTION BLOCK) Disconnect the B33 MAF meter connector. Remove the engine room junction block from the engine room relay block. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition +B (B33-3) - 1E-6 (Engine room junction block) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition +B (B33-3) or 1E-6 (Engine room junction block) - Body ground 10 kohms or higher Reinstall the engine room junction block. Reconnect the B33 MAF meter connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT ENGINE ROOM JUNCTION BLOCK (EFI RELAY) Remove the engine room junction block from the engine room relay block. Inspect the EFI relay. Measure the EFI relay resistance. Standard resistance Tester Connection Specified Condition 1E-12 - 1E-6 10 kohms or higher 1E-12 - 1E-6 Bellow 1 ohms (Apply battery voltage between terminals 1E-9 and 1E-10) Reinstall the engine room junction block. OK --> See step 11 NG: REPLACE ENGINE ROOM JUNCTION BLOCK
CHECK HARNESS AND CONNECTOR (SENSOR GROUND) Disconnect the B33 MAF meter connector. Measure the resistance between the terminals. Standard resistance Tester Connection Specified Condition E2G (B33-4) - Body ground Below 1 ohms Reconnect the MAF meter connector. OK --> See step 10 NG: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B33 MAF meter connector. Disconnect the B12 ECM connector. Measure the resistance between the terminals. Standard resistance (Check for open) Tester Connection Specified Condition E2G (B12-73) - E2G (B33-4) Below 1 ohms Reconnect the MAF meter connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE ECM
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-396635-S17842337612011050900000)
CHECK ECM POWER SOURCE CIRCUIT. Refer to «ECM Power Source Circuit»(ref-396633-S13415458362011050900000)

Scheme 242

Scheme 242: DESCRIPTION

The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the IAT drops, the resistance of the thermistor increases. When the temperature rises, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (see illustration above).
The IAT sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.
Resistor R and the IAT sensor are connected in series. When the resistance value of the IAT sensor changes, according to changes in the IAT, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.

DTC No.	DTC Detection Condition	Trouble Area
P0111	The intake air temperature rise is large, from the previous trip warm-up to the following trip. (2 trip detection logic) When change in the intake air temperature after engine start is less than the threshold value.	MAF Meter

HINT

Scheme 243

Scheme 243: PROCEDURE

Scheme 244

READ VALUE USING INTAKE AIR TEMPERATURE SENSOR (INTAKE AIR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Intake Air. Read the value displayed on the Techstream. Standard Same as actual Intake Air Temperature (IAT). Result Temperature Displayed Proceed to -40°C (-40°F) A 140°C (284°F) B Same as actual IAT C HINT: If there is an open circuit, Techstream indicates -40°C (-40°F). If there is a short circuit, Techstream indicates 140°C (284°F). C --> See step 6 B --> See step 4 A: Go to next step
CHECK MASS AIR FLOW METER (CHECK FOR OPEN IN SENSOR) Confirm good connection of the Mass Air Flow (MAF) meter. Disconnect the B33 MAF meter connector. Connect terminals THA and E2 of the MAF meter wire harness side connector. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Intake Air. Read the value displayed on the Techstream. Standard 140°C (284°F) Reconnect the MAF meter connector. OK --> See step 7 NG: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM) Disconnect the B33 MAF meter connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition THA (B12-71) - THA (B33-1) Below 1 ohms ETHA (B12-74) - E2 (B33-2) Below 1 ohms Reconnect the MAF meter connector. Reconnect the ECM connector. OK --> See step 8 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK MASS AIR FLOW METER (CHECK FOR SHORT IN SENSOR) Disconnect the B33 MAF meter connector. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Intake Air. Read the value displayed on the Techstream. Standard -40°C (-40°F) Reconnect the MAF meter connector. OK --> See step 7 NG: Go to next step
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER- ECM) Disconnect the B33 MAF meter connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition THA (B12-71) or THA (B33-1) - Body ground 10 kohms or higher Reconnect the MAF meter connector. Reconnect the ECM connector. OK --> See step 8 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK FOR INTERMITTENT PROBLEMS. Refer to «PROBLEM SYMPTOMS TABLE»(ref-396630-S03331147362011050900000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-396635-S17842337612011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

Scheme 245

Scheme 245: PROCEDURE

Scheme 246

READ VALUE USING ENGINE COOLANT TEMPERATURE SENSOR (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard Between 80°C and 97°C (176°F and 207°F) with warm engine. Result Temperature Displayed Proceed to -40°C (-40°F) A 140°C (284°F) or more B Between 80°C and 97°C (176°F and 207°F) C HINT: If there is an open circuit, Techstream indicates -40°C (-40°F). If there is a short circuit, Techstream indicates 140°C (284°F) or more. C --> CHECK FOR INTERMITTENT PROBLEMS B --> See step 4 A: Go to next step
CHECK ENGINE COOLANT TEMPERATURE SENSOR (CHECK FOR OPEN IN SENSOR) Confirm good connection of the sensor. Disconnect the B13 engine coolant temperature (ECT) sensor connector. Connect terminals 1 and 2 of the ECT sensor connector on the wire harness side. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard 140°C (284°F) Reconnect the ECT sensor connector. OK --> See step 6 NG: Go to next step
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the B13 ECT sensor connector. Disconnect the B12 ECM connector. Measure the resistance between the terminals. Standard resistance Tester Connection Specified Condition THW (B12-79) - B13-2 Below 1 ohms ETHW (B12-78) - B13-1 Below 1 ohms Reconnect the ECM connector. Reconnect the ECT connector. OK --> See step 7 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK ENGINE COOLANT TEMPERATURE SENSOR (CHECK FOR SHORT IN SENSOR) Disconnect the B13 ECT sensor connector. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. Read the value displayed on the Techstream. Standard -40°C (-40°F) Reconnect the ECT sensor connector. OK --> See step 6 NG: Go to next step
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Disconnect the B13 ECT sensor connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition THW (B12-79) or B13-2 - Body ground 10 kohms or higher Reconnect the ECT sensor connector. Reconnect the ECM connector. OK --> See step 7 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-396635-S33992661182011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

If any of DTCs P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Scheme 247

Scheme 247: PROCEDURE

READ VALUE USING TECHSTREAM (THROTTLE POSITION SENSOR) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / ETCS / Throttle Position No. 1 and Throttle Position No. 2. Read the values displayed on the Techstream. RESULT When Accelerator Pedal Released When Accelerator Pedal Depressed Trouble Area Proceed to Throttle Position No. 1 Throttle Position No. 2 Throttle Position No. 1 Throttle Position No. 2 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V 0 to 0.2 V VC circuit open A 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V 4.5 to 5.0 V E2 circuit open 0 to 0.2 V, or 4.5 to 5.0 V 2.1 V to 3.1 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 2.1 V to 3.1 V (Fail-safe) VTA1 circuit open or ground short 0.6 V to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V 0.6 V to 1.4 V (Fail-safe) 0 to 0.2 V, or 4.5 to 5.0 V VTA2 circuit open or ground short 0.5 to 1.1 V 2.1 to 3.1 V 3.2 to 4.8 V (Not fail-safe) 4.6 to 5.0 V (Not fail-safe) Throttle position sensor circuit normal B HINT: DTC P0121 is stored when the voltages output from VTA1 and VTA2 are not consistent with the characteristics of the sensors. Therefore, check the Freeze Frame Data when this DTC is output. Use the following formula to confirm relative fluctuations in voltage. Features of sensor output VTA2 x 0.8 is approximately equal to VTA1 + 1.11 V VTA1: Throttle Position No. 1 VTA2: Throttle position No. 2 If DTC P0121 is output, proceed to the "CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)". B --> See step 5 A: Go to next step
CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) Disconnect the throttle body connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Condition Specified Condition VC (B39-5) - VCTA (B12-96) Always Below 1 ohms VTA (B39-6) - VTA1 (B12-98) Always Below 1 ohms VTA2 (B39-4) - VTA2 (B12-99) Always Below 1 ohms E2 (B39-3) - ETA (B12-97) Always Below 1 ohms Standard resistance (Check for short) Tester Connection Condition Specified Condition VC (B39-5) or VCTA (B12-96) - Body ground Always 10 kohms or higher VTA (B39-6) or VTA1 (B12-98) - Body ground Always 10 kohms or higher VTA2 (B39-4) or VTA2 (B12-99) - Body ground Always 10 kohms or higher Reconnect the ECM connector. Reconnect the throttle body connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE POSITION SENSOR - ECM) OK: Go to next step
INSPECT ECM (VC VOLTAGE) Disconnect the throttle body connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition VC (B39-5) - E2 (B39-3) Engine switch on (IG) 4.5 to 5.5 V Reconnect the throttle body connector. NG --> See step 6 OK: Go to next step
REPLACE THROTTLE W/MOTOR BODY ASSY Replace the throttle body. Refer to «REMOVAL»(ref-396635-S26235626152011050900000) . NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (THROTTLE POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine. Allow the engine to idle for 15 seconds or more. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Result Proceed to DTC P0120, P0121, P0122, P0123, P0220, P0222, P0223, and/or P2135 are output A DTC is not output B B --> END A: Go to next step
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

HINT

If any of DTCs P0115, P0116, P0117 or P0118 are set simultaneously with DTC P0125, the Engine Coolant Temperature (ECT) sensor may have an open or a short circuit. Troubleshoot those DTCs first.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

HINT

Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine and turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
On the Techstream, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5 % or increases the injection volume by 25 %.
Each sensor reacts in accordance with increases in the fuel injection volume.

Techstream Display (Sensor)	Injection Volume	Status	Voltage
AFS Voltage B1S1 or AFS Voltage B2S1 (A/F)	+25 %	Rich	Less than 3.1 V
AFS Voltage B1S1 or AFS Voltage B2S1 (A/F)	12.5 %	Lean	More than 3.4 V
O2S B1S2 or O2S B2S2 (HO2)	+25 %	Rich	More than 0.55 V
O2S B1S2 or O2S B2S2 (HO2)	12.5 %	Lean	Less than 0.4 V

Note. The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

Scheme 248

Scheme 249

Scheme 250

Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1S1 or AFS Voltage B2S1 and O2S B1S2 or O2S B2S2 then press the graph button on the Data List view.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .
If the OX1B wire from the ECM connector is short-circuited to the +B wire, DTC P0136 will be set.
If the OX2B wire from the ECM connector is short-circuited to the +B wire, DTC P0156 will be set.

Scheme 251

Scheme 251: PROCEDURE

Scheme 252

Scheme 253

Scheme 254

Scheme 255

Scheme 256

READ DTC OUTPUT Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Code. Read the DTCs. Result Display (DTC Output) Proceed to P0138 or P0158 A P0137 or P0157 B P0136 or P0156 C P0139 or P0159 D D --> See step 18 C --> See step 7 B --> See step 9 A: Go to next step
READ VALUE USING OXYGEN SENSOR (OUTPUT VOLTAGE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / O2S B1S2 or O2S B2S2. Allow the engine to idle. Read the Heated Oxygen (HO2) sensor output voltage while idling. Result Result Proceed to 1.0 V or more A Less than 1.0 V B B --> See step 6 A: Go to next step
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the B24 oxygen sensor connector (Bank 1 Sensor 2) or B25 oxygen sensor connector (Bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Specified Condition +B (2) - E (4) 10 kohms or higher +B (2) - OX (3) 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Specified Condition +B (2) - E (4) 10 kohms or higher +B (2) - OX (3) 10 kohms or higher Reconnect the oxygen sensor connector. NG --> See step 22 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the engine switch off and wait for 5 seconds. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition HT1B (B12-48) - OX1B (B12-88) 10 kohms or higher HT2B (B12-47) - OX2B (B12-87) 10 kohms or higher Reconnect the ECM connector. OK --> See step 23 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream, and monitoring the voltage output of air fuel ratio and heated oxygen sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The air fuel ratio sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the heated oxygen sensor is displayed as O2S B1S2 or O2S B2S2, on the Techstream. Result Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Alternates between more and less than 3.3 V OK AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Remains at more than 3.3 V NG AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Remains at less than 3.3 V NG HINT: A normal heated oxygen sensor voltage (O2S B1S2 or O2S B2S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 15 OK: Go to next step
CHECK AIR FUEL RATIO SENSOR CURRENT HINT: This air fuel ratio sensor test is to check the air fuel ratio sensor current during the fuel-cut. When the sensor is normal, the sensor current will indicate below 3.0 mA in this test. Connect Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Perform the drive pattern as listed below. Warm-up the engine until the engine coolant temperature is 75°C (167°F) or more. Drive the vehicle at 38 mph (60 km/h) or more and decelerate the vehicle for 7 seconds or more. Repeat the deceleration above at 3 times. Enter the following menu items: Powertrain / Engine / Monitor / O2 Sensor / Details. Confirm that RANGE B1S1 and RANGE B2S1 are either PASS or FAIL. If the Techstream shows Incomplete, re-check RANGE B1S1 and RANGE B2S1 after performing the drive pattern. Select the RANGE B1S1 and RANGE B2S1. Read the value. Standard current Less than 3.0 mA HINT: If the Techstream shown Incomplete again, add the vehicle speed and use the second gear to decelerate the vehicle. NG --> See step 15 OK --> See step 12
READ VALUE USING OXYGEN SENSOR (OUTPUT VOLTAGE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Start the engine. Enter the following menus: Powertrain / Engine / Data List / O2S B1S2 or O2S B2S2. After warming up the engine, run the engine at an engine speed of 2500 rpm for 3 minutes. Read the output voltage of the HO2 sensor when the engine rpm is suddenly increased. HINT: Quickly accelerate the engine to 4000 rpm 3 times using the accelerator pedal. Standard voltage Fluctuates between 0.4 V or less and 0.55 V or more. NG --> See step 9 OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (INJECTION VOLUME) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the engine. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume. Change the fuel injection volume using the Techstream, and monitoring the voltage output of air fuel ratio and heated oxygen sensors displayed on the Techstream. HINT: Change the fuel injection volume within the range of -12% and +12%. The injection volume can be changed in 1% graduations within the range. The air fuel ratio sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the heated oxygen sensor is displayed as O2S B1S2 or O2S B2S2, on the Techstream. Result Techstream Display (Sensor) Voltage Variation Proceed to AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Alternates between more and less than 3.3 V OK AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Remains at more than 3.3 V NG AFS Voltage B1S1 (Air fuel ratio) AFS Voltage B2S1 (Air fuel ratio) Remains at less than 3.3 V NG HINT: A normal heated oxygen sensor voltage (O2S B1S2 or O2S B2S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage remains at either less or more than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning. NG --> See step 15 OK: CHECK AND EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (INJECTOR, FUEL PRESSURE, GAS LEAKAGE FROM EXHAUST SYSTEM)
CHECK FOR EXHAUST GAS LEAKS Check for exhaust gas leakage from the exhaust manifold and pipe. OK No gas leakage. NG --> REPAIR OR REPLACE EXHAUST GAS LEAKAGE POINT OK: Go to next step
INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE) Disconnect the B24 heated oxygen sensor connector (Bank 1 Sensor 2) or B25 heated oxygen sensor connector (Bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 11 to 16 ohms HT (1) - E (4) Always 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Condition Specified Condition HT (1) - +B (2) 20°C (68°F) 11 to 16 ohms HT (1) - E (4) Always 10 kohms or higher Reconnect the heated oxygen sensor connector. NG --> See step 12 OK: Go to next step
CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM) Disconnect the B24 oxygen sensor connector (Bank 1 Sensor 2) or B25 oxygen sensor connector (Bank 2 sensor 2). Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Terminal Connection Specified Condition HT (B24-1) - HT1B (B12-48) Below 1 ohms OX (B24-3) - OX1B (B12-88) Below 1 ohms E (B24-4) - EX1B (B12-65) Below 1 ohms HT (B25-1) - HT2B (B12-47) Below 1 ohms OX (B25-3) - OX2B (B12-87) Below 1 ohms E (B25-4) - EX2B (B12-64) Below 1 ohms Standard resistance (Check for short) Terminal Connection Specified Condition HT (B24-1) or HT1B (B12-48) - Body ground 10 kohms or higher OX (B24-3) or OX1B (B12-88) - Body ground 10 kohms or higher E (B24-4) or EX1B (B12-65) - Body ground 10 kohms or higher HT (B25-1) or HT2B (B12-47) - Body ground 10 kohms or higher OX (B25-3) or OX2B (B12-87) - Body ground 10 kohms or higher E (B25-4) or EX2B (B12-64) - Body ground 10 kohms or higher Reconnect the oxygen sensor connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE HEATED OXYGEN SENSOR Replace the heated oxygen sensor. NEXT: Go to next step
PERFORM CONFIRMATION DRIVING PATTERN Refer to the confirmation driving pattern for P0136, P0137, P0138, P0156, P0157 and P0158. NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158) Connect Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input DTC: P0136, P0137, P0138, P0156, P0157 or P0158. Check the DTC Monitor is NORMAL. If DTC Monitor is INCOMPLETE, perform the drive pattern adding the vehicle speed and using the second gear to decelerate the vehicle. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (P0136, P0137, P0138, P0156, P0157 or P0158 is output) B B --> See step 24 A: END
REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. NEXT: Go to next step
PERFORM CONFIRMATION DRIVING PATTERN Refer to the confirmation driving pattern for P0136, P0137, P0138, P0156, P0157 and P0158. NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0138, P0156, P0157 OR P0158) Connect Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input DTC: P0136, P0137, P0138, P0156, P0157 or P0158. Check the DTC Monitor is NORMAL. If DTC Monitor is INCOMPLETE, perform the drive pattern adding the vehicle speed and using the second gear to decelerate the vehicle. Result Result Proceed to NORMAL (DTC is not output) A ABNORMAL (P0136, P0137, P0138, P0156, P0157 or P0158 is output) B B --> See step 22 A: END
READ VALUE USING OXYGEN SENSOR (OUTPUT VOLTAGE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / O2S B1S2 or O2S B2S2. Allow the engine to idle. Read the Heated Oxygen (HO2) sensor output voltage while idling. Result Result Proceed to 1.0 V or more A Less than 1.0 V B B --> See step 21 A: Go to next step
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT) Disconnect the B24 oxygen sensor connector (Bank 1 Sensor 2) or B25 oxygen sensor connector (Bank 2 sensor 2). Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 2) Tester Connection Specified Condition +B (2) - E (4) 10 kohms or higher +B (2) - OX (3) 10 kohms or higher Standard resistance (Bank 2 sensor 2) Tester Connection Specified Condition +B (2) - E (4) 10 kohms or higher +B (2) - OX (3) 10 kohms or higher Reconnect the oxygen sensor connector. NG --> See step 22 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) Turn the engine switch off and wait for 5 seconds. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition HT1B (B12-48) - OX1B (B12-88) 10 kohms or higher HT2B (B12-47) - OX2B (B12-87) 10 kohms or higher Reconnect the ECM connector. OK --> See step 23 NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
READ DTC OUTPUT (DTC P0139 OR P0159 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Turn the engine switch off and wait for 30 seconds [A]. Start the engine. Warm-up the engine until the engine coolant temperature is 75°(167°F) or more [B]. Drive the vehicle 38 mph (60 km/h) and decelerate the vehicle for 7 seconds or more [C]. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / All Readiness. Input DTCs: P0139 and P0159. Check that DTC Monitor is NORMAL. If DTC Monitor is Incomplete, perform the driving pattern increasing the vehicle speed and using the second gear to decelerate the vehicle. Result Display (DTC Output) Proceed to NORMAL (DTC is not output) A ABNORMAL (DTC P0139 or P0159 is output) B A --> See step 25 B: Go to next step
REPLACE HEATED OXYGEN SENSOR. Refer to «REMOVAL»(ref-396640-S17554594272011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-396640-S01703233552011050900000)
CHECK INTERMITTENT PROBLEMS. Refer to «CHECK FOR INTERMITTENT PROBLEMS»(ref-396630-S16310885982011050900000)

HINT

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume.)
Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream.

HINT

The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
Each sensor reacts in accordance with increases and decreases in the fuel injection volume.

Techstream Display (Sensor)	Injection Volume	Status	Voltage
AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio)	+25%	Rich	Less than 3.1 V
AFS Voltage B1S1 or AFS Voltage B2S1 (Air fuel ratio)	12.5%	Lean	More than 3.4 V
O2S B1S2 or O2S B2S2 (Heated oxygen)	+25%	Rich	More than 0.55 V
O2S B1S2 or O2S B2S2 (Heated oxygen)	12.5%	Lean	Less than 0.4 V

Note. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit Exhaust gas leaks 4 Fuel pressure Exhaust gas leaks (Air fuel ratio extremely lean or rich)

Scheme 257

Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.
To display the graph, enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2; and then press the graph button on the Data List view.

HINT

A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

For use of the Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

Connect the Techstream to the DLC3.
Start the engine and turn the Techstream on.
Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
Select the following menu items on the Techstream: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor.
Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard voltage Techstream Display (Sensor) Injection Volumes Status Voltages AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) +25% Rich Less than 3.1 V AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) -12.5% Lean More than 3.4 V O2S B1S2 or O2S B2S2 (HO2) +25% Rich More than 0.55 V O2S B1S2 or O2S B2S2 (HO2) -12.5% Lean Less than 0.4 V NOTE: The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds. Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich) Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors. To display the graph, select the following menu items on the Techstream: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor /AFS Voltage B1S1 or AFS Voltage B2S1 and O2S B1S2 or O2S B2S2 then press the graph button on the Data List view. HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. A low A/F sensor voltage could be caused by a rich air-fuel mixture. Check for conditions that would cause the engine to run rich. A high A/F sensor voltage could be caused by a lean air-fuel mixture. Check for conditions that would cause the engine to run lean.

Scheme 258

Scheme 258: PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0171, P0172, P0174 OR P0175) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display (DTC Output) Proceed to P0171, P0172, P0174 or P0175 A P0171, P0172, P0174 or P0175 and other DTCs B HINT: If any DTCs other than P0171, P0172, P0174 or P0175 are output, troubleshoot those DTCs first. B --> See step 17 A: Go to next step
CHECK PCV HOSE CONNECTIONS OK PCV hose is connected correctly and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from the air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR) Connect the Techstream to the DLC3. Start the engine and turn the Techstream on. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds. Select the following menu items on the Techstream: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume). Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the Techstream. HINT: The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard voltage Techstream Display (Sensor) Injection Volumes Status Voltages AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) +25% Rich Less than 3.1 V AFS Voltage B1S1 or AFS Voltage B2S1 (A/F) -12.5% Lean More than 3.4 V O2S B1S2 or O2S B2S2 (HO2) +25% Rich More than 0.55 V O2S B1S2 or O2S B2S2 (HO2) -12.5% Lean Less than 0.4 V Result Status AFS Voltage B1S1 or AFS Voltage B2S1 Status O2S B1S2 or O2S B2S2 A/F Condition and A/F Sensor Condition Misfires Suspected Trouble Areas Proceed to Lean/Rich Lean/Rich Normal - - A Lean Lean Actual air-fuel ratio lean May occur PCV valve and hose PCV hose connections Injector blockage Gas leakage from exhaust system Air induction system Fuel pressure Mass Air Flow (MAF) meter Engine Coolant Temperature (ECT) sensor A Rich Rich Actual air-fuel ratio rich - Injector leakage or blockage Gas leakage from exhaust system Ignition system Fuel pressure MAF meter ECT sensor A Lean Lean/Rich A/F sensor malfunction - A/F sensor B Rich Lean/Rich A/F sensor malfunction - A/F sensor B Lean: During Control the Injection Volume for A/F Sensor, the A/F sensor output voltage (AFS) is consistently more than 3.4 V, and the HO2 sensor output voltage (O2S) is consistently less than 0.4 V. Rich: During Control the Injection Volume for A/F Sensor, the AFS is consistently less than 3.1 V, and the O2S is consistently more than 0.55 V. Lean/Rich: During Control the Injection Volume for A/F Sensor of the Active Test, the output voltage of the heated oxygen sensor alternates correctly. B --> See step 11 A: Go to next step
READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine / Data List / Coolant Temp. Read Coolant Temp twice, when the engine is both cold and warmed up. Standard With cold engine Same as ambient air temperature. With warm engine Between 75°C and 95°C (167°F and 203°F) NG --> See step 18 OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect the mass air flow meter. Refer to «ON-VEHICLE INSPECTION»(ref-396635-S31956441732011050900000) . NG --> See step 19 OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-396643-S12475227402011050900000) . NG --> REPAIR OR REPLACE FUEL SYSTEM OK: Go to next step
CHECK FOR EXHAUST GAS LEAKS OK No gas leakage. NG --> REPAIR OR REPLACE EXHAUST SYSTEM OK: Go to next step
CHECK FOR SPARKS AND IGNITION Check for sparks and ignition. Refer to «ON-VEHICLE INSPECTION»(ref-396636-S40474983112011050900000) . HINT: If the spark plugs or ignition system malfunctions, engine misfire may occur. The misfire count can be read using the Techstream. Select the following menu items: Powertrain / Engine / Data List / Cylinder #1 Misfire Count (to Cylinder #6 Misfire Count). NG --> REPAIR OR REPLACE IGNITION SYSTEM OK: Go to next step
INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME) Inspect the fuel injector assembly. Refer to «INSPECTION»(ref-396644-S30708789662011050900000) . HINT: If the injectors malfunction, engine misfire may occur. The misfire count can be read using the Techstream. Select the following menu items: Powertrain / Engine / Data List / Cylinder #1 Misfire Count (to Cylinder #6 Misfire Count). Result Result Proceed to NG A OK B B --> See step 15 A --> See step 20
INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE) Disconnect the B3 or B4 A/F sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Bank 1 sensor 1) Tester Connections Specified Conditions HT (1) - +B (2) 1.8 to 3.4 ohms at 20°C (68°F) HT (1) - AF- (4) 10 kohms or higher Standard resistance (Bank 2 sensor 1) Tester Connections Specified Conditions HT (1) - +B (2) 1.8 to 3.4 ohms at 20°C (68°F) HT (1) - AF- (4) 10 kohms or higher Reconnect the A/F sensor connector. NG --> See step 21 OK: Go to next step
INSPECT ENGINE ROOM JUNCTION BLOCK (A/F RELAY) Remove the engine room junction block from the engine room R/B. Measure the A/F relay resistance. Standard resistance Tester Connections Specified Conditions 1G-1 - 1A-4 10 kohms or higher 1G-1 - 1A-4 Below 1 ohms (when battery voltage applied to terminals 1E-6 and 1E-11) Reinstall the engine room junction block. NG --> REPLACE ENGINE ROOM JUNCTION BLOCK OK: Go to next step
CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM) Disconnect the B3 or B4 A/F sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connections Specified Conditions +B (B3-2) - Body ground 9 to 14 V +B (B4-2) - Body ground 9 to 14 V Turn the engine switch off. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connections Specified Conditions HT (B3-1) - HA1A (B12-86) Below 1 ohms AF+ (B3-3) - A1A+ (B12-93) Below 1 ohms AF- (B3-4) - A1A- (B12-116) Below 1 ohms HT (B4-1) - HA2A (B12-109) Below 1 ohms AF+ (B4-3) - A2A+ (B12-120) Below 1 ohms AF- (B4-4) - A2A- (B12-119) Below 1 ohms Standard resistance (Check for short) Tester Connections Specified Conditions HT (B3-1) or HA1A (B12-86) - Body ground 10 kohms or higher AF+ (B3-3) or A1A+ (B12-93) - Body ground 10 kohms or higher AF- (B3-4) or A1A- (B12-116) - Body ground 10 kohms or higher HT (B4-1) or HA2A (B12-109) - Body ground 10 kohms or higher AF+ (B4-3) or A2A+ (B12-120) - Body ground 10 kohms or higher AF- (B4-4) or A2A- (B12-119) - Body ground 10 kohms or higher Reconnect the ECM connector. Reconnect the A/F sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE AIR FUEL RATIO SENSOR Replace the air fuel ratio sensor. Refer to «REMOVAL»(ref-396640-S01703233552011050900000) . NEXT: Go to next step
PERFORM CONFIRMATION DRIVING PATTERN Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on (Procedure B). Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) (Procedure C). Turn the engine switch off. Turn the engine switch on (IG) and turn the Techstream on. Start the engine and warm it up. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern. NEXT: Go to next step
CHECK WHETHER DTC OUTPUT RECURS (DTC P0171, P0172, P0174 OR P0175) Select the following menu items: Powertrain / Engine / Trouble Codes / Pending. Read the pending DTCs. Result Display (DTC Output) Proceed to No output A P0171, P0172, P0174 or P0175 B B --> REPLACE ECM A --> END
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396630-S19862863392011050900000)
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «REMOVAL»(ref-396635-S33992661182011050900000)
REPLACE MASS AIR FLOW METER. Refer to «REMOVAL»(ref-396635-S17842337612011050900000)
REPLACE FUEL INJECTOR ASSEMBLY. Refer to «REMOVAL»(ref-396644-S22434791392011050900000)
REPLACE AIR FUEL RATIO SENSOR. Refer to «REMOVAL»(ref-396640-S01703233552011050900000)

HINT

If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored in the ECM as freeze frame data.
If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame data have been reproduced, one of the following factors is considered to be a possible cause of the problem: There was insufficient fuel volume in the tank. Improper fuel is used. The spark plugs have been contaminated.
After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #6 Misfire Count).
Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving pattern after finishing repairs.
For 6 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at high engine RPM. If misfires occur only in high engine RPM areas, only DTC P0300 is set. In the event of DTC P0300 being present, perform the following operations: Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-396630-S12048003312011050900000) . Start the engine and conduct the confirmation driving pattern. Read the misfiring rates of each cylinder or DTC(s) using the Techstream. Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC. After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not set.
When one of Short FT #1, Long FT #1, Short FT #2 or Long FT #2 in the freeze frame data is outside the range of +/-20%, the air fuel ratio may be Rich (-20% or less) or Lean (+20% or more).
When the Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfire have occurred only while warming up the engine.
An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

Scheme 259

Scheme 259: PROCEDURE

Scheme 260

CHECK ANY OTHER DTC OUTPUT (IN ADDITION TO MISFIRE CODES) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read DTCs. HINT: Write down the DTCs. Result Display (DTC Output) Proceed to P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 A P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs B HINT: If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and P0306 are output, troubleshoot those DTCs first. B --> See step 31 A: Go to next step
READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Misfire RPM and Misfire Load. Read and note the Misfire RPM and Misfire Load values. HINT: The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred. NEXT: Go to next step
CHECK PCV HOSE (HOSE CONNECTIONS) OK PCV hose is correctly connected and is not damaged. NG --> REPAIR OR REPLACE PCV HOSE OK: Go to next step
READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Catalyst OT MF F/C. Read the value displayed on the Techstream. Result Data List Techstream Display Proceed to Catalyst OT MF F/C Avail A Not Avl B B --> See step 6 A: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire prevent F/C. Perform the Active Test. NOTE: When performing the Active Test, make sure the vehicle is stopped and either idling or being revved within 3000 rpm. NEXT: Go to next step
READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Misfire / Cylinder #1 Misfire Count, #2, #3, #4, #5 and #6 Read each value for Cylinder #1 Misfire Count to #6 displayed on the Techstream. If no misfire counts occur in any cylinders, perform the following procedures: Start the engine and let it idle. Move the shift lever to the D position. Check the Cylinder #1 Misfire Count to #6. If misfire counts are still not displayed, perform steps [A] and [B]. Drive the vehicle with the Misfire RPM and Misfire Load noted in the "READ VALUE OF TECHSTREAM (Misfire RPM AND Misfire Load)" procedures above [A]. Read the Cylinder #1 Misfire Count to #6 or DTCs displayed on the Techstream [B]. Result Misfire Count Proceed to Most misfires occur in only 1 or 2 cylinders A 3 cylinders or more have equal misfire counts B HINT: If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal. If the freeze frame data's record of the engine coolant temperature is below 75°C (167°F), the misfire may be detected only when the engine is cold. If the freeze frame data's record of the Engine Run Time is below 120 seconds, the misfire may be detected immediately after the engine is started. B --> See step 18 A: Go to next step
CHECK SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Maximum gap 1.4 mm (0.055 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO FK20HR11 NOTE: If the electrode gap is larger than 1.4 mm (0.055 in.), replace the spark plug. Do not adjust the electrode gap. NG --> REPLACE SPARK PLUG OK: Go to next step
CHECK FOR SPARKS Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Remove the ignition coil from the cylinder head. Install the spark plug onto the ignition coil. Attach the spark plug assembly to the cylinder head. Crank the engine for less than 2 seconds and check the spark. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 9»(ref-396638-S15202789002011050900000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
CHECK HARNESS AND CONNECTOR (INJECTOR OF MISFIRING CYLINDER POWER SOURCE) Disconnect the injector connector (of the misfiring cylinder). Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B16-2 - Body ground Engine switch on (IG) 9 to 14 V No. 2 B17-2 - Body ground Engine switch on (IG) 9 to 14 V No. 3 B18-2 - Body ground Engine switch on (IG) 9 to 14 V No. 4 B19-2 - Body ground Engine switch on (IG) 9 to 14 V No. 5 B20-2 - Body ground Engine switch on (IG) 9 to 14 V No. 6 B21-2 - Body ground Engine switch on (IG) 9 to 14 V Reconnect the injector connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - INJECTOR) OK: Go to next step
CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING) Disconnect the injector connector and ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition #10 (B12-45) - B16-1 Below 1 ohms #20 (B12-85) - B17-1 Below 1 ohms #30 (B12-44) - B18-1 Below 1 ohms #40 (B12-84) - B19-1 Below 1 ohms #50 (B12-43) - B20-1 Below 1 ohms #60 (B12-83) - B21-1 Below 1 ohms #10 (B12-45) or B16-1 - Body ground 10 kohms or higher #20 (B12-85) or B17-1 - Body ground 10 kohms or higher #30 (B12-44) or B18-1 - Body ground 10 kohms or higher #40 (B12-84) or B19-1 - Body ground 10 kohms or higher #50 (B12-43) or B20-1 - Body ground 10 kohms or higher #60 (B12-83) or B21-1 - Body ground 10 kohms or higher Reconnected the injector connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR - ECM) OK: Go to next step
CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance. Refer to «INSPECTION - Step 1»(ref-396644-S18733141412011050900000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor). Refer to «INSPECTION»(ref-396644-S30708789662011050900000) . NG --> See step 32 OK: Go to next step
CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
CHECK VALVE TIMING NG --> ADJUST VALVE TIMING OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-396643-S12475227402011050900000) . NG --> CHECK AND REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE AND FILTER OK: Go to next step
READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. Read the Coolant Temp twice, when the engine is both cold and warmed up. Standard With cold engine Same as ambient temperature. With warm engine Between 75°C and 95°C (167°F and 203°F). NG --> See step 33 OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect mass air flow meter. Refer to «ON-VEHICLE INSPECTION»(ref-396635-S31956441732011050900000) . NG --> See step 34 OK --> See step 35
CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
CHECK VALVE TIMING NG --> ADJUST VALVE TIMING OK: Go to next step
CHECK FUEL PRESSURE Check the fuel pressure. Refer to «ON-VEHICLE INSPECTION - Step 2»(ref-396643-S12475227402011050900000) . NG --> CHECK AND REPLACE FUEL PUMP, PRESSURE REGULATOR, FUEL PIPE LINE AND FILTER OK: Go to next step
READ VALUE USING TECHSTREAM (COOLANT TEMP) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Coolant Temp. Read the Coolant Temp twice, when the engine is both cold and warmed up. Standard With cold engine Same as ambient temperature. With warm engine Between 75°C and 95°C (167°F and 203°F). NG --> See step 33 OK: Go to next step
INSPECT MASS AIR FLOW METER Inspect mass air flow meter. Refer to «COMPONENTS»(ref-396635-S32329080362011050900000) . NG --> See step 34 OK: Go to next step
CHECK SPARK PLUG Remove the ignition coil and the spark plug of the misfiring cylinder. Measure the spark plug electrode gap. Maximum gap 1.4 mm (0.055 in.) Check the electrode for carbon deposits. RECOMMENDED SPARK PLUG: Manufacturer Product DENSO FK20HR11 NOTE: If the electrode gap is larger than 1.4 mm (0.055 in.), replace the spark plug. Do not adjust the electrode gap. NG --> REPLACE SPARK PLUG OK: Go to next step
CHECK FOR SPARKS Disconnect the injector connectors to prevent the engine from starting. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Remove the ignition coil from the cylinder head. Install the spark plug onto the ignition coil. Attach the spark plug assembly to the cylinder head. Crank the engine for less than 2 seconds and check the spark. OK Sparks jump across electrode gap. Install the ignition coil. Reconnect the injector connectors. NG --> See step 29 OK: Go to next step
CHECK CYLINDER COMPRESSION PRESSURE Measure the cylinder compression pressure of the misfiring cylinder. Refer to «ON-VEHICLE INSPECTION - Step 9»(ref-396638-S15202789002011050900000) . NG --> CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION OK: Go to next step
CHECK HARNESS AND CONNECTOR (INJECTOR OF MISFIRING CYLINDER POWER SOURCE) Disconnect the injector connector (of the misfiring cylinder). Measure the voltage according to the value(s) in the table below. Standard voltage Cylinder Tester Connection Switch Condition Specified Condition No. 1 B16-2 - Body ground Engine switch on (IG) 11 to 14 V No. 2 B17-2 - Body ground Engine switch on (IG) 11 to 14 V No. 3 B18-2 - Body ground Engine switch on (IG) 11 to 14 V No. 4 B19-2 - Body ground Engine switch on (IG) 11 to 14 V No. 5 B20-2 - Body ground Engine switch on (IG) 11 to 14 V No. 6 B21-2 - Body ground Engine switch on (IG) 11 to 14 V Reconnect the injector connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - INJECTOR) OK: Go to next step
CHECK HARNESS AND CONNECTOR (ECM - INJECTOR OF MISFIRING) Disconnect the injector connector and ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition #10 (B12-45) - B16-1 Below 1 ohms #20 (B12-85) - B17-1 Below 1 ohms #30 (B12-44) - B18-1 Below 1 ohms #40 (B12-84) - B19-1 Below 1 ohms #50 (B12-43) - B20-1 Below 1 ohms #60 (B12-83) - B21-1 Below 1 ohms #10 (B12-45) or B16-1 - Body ground 10 kohms or higher #20 (B12-85) or B17-1 - Body ground 10 kohms or higher #30 (B12-44) or B18-1 - Body ground 10 kohms or higher #40 (B12-84) or B19-1 - Body ground 10 kohms or higher #50 (B12-43) or B20-1 - Body ground 10 kohms or higher #60 (B12-83) or B21-1 - Body ground 10 kohms or higher Reconnected the injector connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR - ECM) OK: Go to next step
CHECK FUEL INJECTOR OF MISFIRING CYLINDER Check the injector resistance. Refer to «INSPECTION - Step 1»(ref-396644-S18733141412011050900000) . Check the injector injection (whether fuel volume is high or low, and whether injection pattern is poor). Refer to «INSPECTION»(ref-396644-S30708789662011050900000) . NG --> See step 32 OK --> See step 35
CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Change the installed spark plug to a spark plug that functions normally. Perform a spark test. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug to the ignition coil and connect the ignition coil connector. Disconnect the injector connector. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. OK --> REPLACE SPARK PLUG NG: Go to next step
CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER Change the ignition coil to a ignition coil that functions normally. Perform a spark test. WARNING: Always disconnect all injector connectors. NOTE: Do not crank the engine for more than 2 seconds. Install the spark plug into the ignition coil and connect the ignition coil connector. Disconnect the injector connector. Ground the spark plug. Check if sparks occur while the engine is being cranked. OK Sparks jump across electrode gap. NG --> See step 35 OK --> See step 36
GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-396630-S19862863392011050900000)
REPLACE FUEL INJECTOR ASSEMBLY. Refer to «COMPONENTS»(ref-396644-S29734195342011050900000)
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to «COMPONENTS»(ref-396635-S25387023352011050900000)
REPLACE MASS AIR FLOW METER. Refer to «COMPONENTS»(ref-396635-S32329080362011050900000)
REPLACE ECM. Refer to «COMPONENTS»(ref-396635-S32341521312011050900000)
REPLACE IGNITION COIL. Refer to «REMOVAL»(ref-396645-S17756687572011050900000)

HINT

DTCs P0327 and P0328 are for the bank 1 knock sensor circuit.
DTCs P0332 and P0333 are for the bank 2 knock sensor circuit.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

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READ OUTPUT DTC (CHECK KNOCK SENSOR CIRCUIT) Disconnect the BV1 connector. Using lead wires, connect the connectors as follows: Male Connector - Female Connector Terminal 2 - Terminal 4 Terminal 1 - Terminal 3 Terminal 4 - Terminal 2 Terminal 3 - Terminal 1 Warm up the engine. Run the engine at 3000 rpm for 10 seconds or more. Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Read the DTCs. Result Display Proceed to DTCs same as when vehicle brought in: P0327, P0328 --> P0327, P0328 or P0332, P0333 --> P0332, P0333 A DTCs different from when vehicle brought in: P0327, P0328 --> P0332, P0333 or P0332, P0333 --> P0327, P0328 B Reconnect the BV1 connector. B --> See step 5 A: Go to next step
CHECK WIRE HARNESS AND CONNECTOR (CONNECTOR - ECM) Disconnect the BV1 connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition BV1 female connector 2 - KNK1 (B12-95) Below 1 ohms BV1 female connector 1 - EKNK (B12-94) Below 1 ohms BV1 female connector 4 - KNK2 (B12-118) Below 1 ohms BV1 female connector 3 - EKN2 (B12-117) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition BV1 female connector 2 or KNK1 (B12-95) - Body ground 10 kohms or higher BV1 female connector 1 or EKNK (B12-94) - Body ground 10 kohms or higher BV1 female connector 4 or KNK2 (B12-118) - Body ground 10 kohms or higher BV1 female connector 3 or EKN2 (B12-117) - Body ground 10 kohms or higher Reconnect the BV1 connector. Reconnect the ECM connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT ECM Disconnect the BV1 connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition BV1 female connector 2 - 1 4.5 to 5.5 V BV1 female connector 4 - 3 4.5 to 5.5 V Reconnect the ECM connector. OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)
INSPECT KNOCK SENSOR Disconnect the BV1 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified Condition BV1 male connector 1 - 2 120 to 280 kohms BV1 male connector 3- 4 120 to 280 kohms Reconnect the BV1 connector. OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR) HINT: If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on the right bank side. If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on the left bank side. Disconnect the BV1 connector. Disconnect the V1 and V2 knock sensor connectors. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition BV1 male connector 2 - V1-2 Below 1 ohms BV1 male connector 1 - V1-1 Below 1 ohms BV1 male connector 4 - V2-2 Below 1 ohms BV1 male connector 3 - V2-1 Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition BV1 male connector 2 or V1-2 - Body ground 10 kohms or higher BV1 male connector 1 or V1-1 - Body ground 10 kohms or higher BV1 male connector 4 or V2-2 - Body ground 10 kohms or higher BV1 male connector 3 or V2-1 - Body ground 10 kohms or higher Reconnect the BV1 connector. Reconnect the knock sensor connectors. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
REPLACE KNOCK SENSOR. Refer to «REMOVAL»(ref-396635-S37480613902011050900000)

HINT

If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the procedure below: Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Data List / Engine Speed. The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the crankshaft position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the CKP sensor output voltage is insufficient.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. Refer to «FREEZE FRAME DATA»(ref-396630-S23203956252011050900000) .

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Scheme 264: PROCEDURE

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INSPECT CRANKSHAFT POSITION SENSOR Disconnect the B9 crankshaft position (CKP) sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 Cold 1630 to 2740 ohms 1 - 2 Hot 2065 to 3225 ohms HINT: Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F). Reconnect the CKP sensor connector. NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Disconnect the B9 CKP sensor connector. Disconnect the B12 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition B9-1 - NE+ (B12-110) Below 1 ohms B9-2 - NE- (B12-111) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition B9-1 or NE+ (B12-110) - Body ground 10 kohms or higher B9-2 or NE- (B12-111) - Body ground 10 kohms or higher Reconnect the ECM connector. Reconnect the CKP sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
CHECK CRANKSHAFT POSITION SENSOR (SENSOR INSTALLATION) Check the CKP sensor installation condition. OK Sensor is installed correctly. NG --> REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR OK: Go to next step
CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE) Check the teeth of the sensor plate. OK Sensor plate teeth do not have any cracks or deformation. OK --> See step 6 NG: REPLACE CRANKSHAFT POSITION SENSOR PLATE
REPLACE CRANKSHAFT POSITION SENSOR. Refer to «REMOVAL»(ref-396635-S22138626422011050900000)
REPLACE ECM. Refer to «REMOVAL»(ref-396635-S35871318042011050900000)

Engine Control System (Diagnostic Codes (P0010-P0339)): Diagnosis Lexus ES XV40 facelift

INSPECTION PROCEDURE

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