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Engine Electrical Devices (n32a) Suzuki Grand Vitara II рестайлинг

Engine Control Systems 55 illustrations ~3651 words

Engine Control Module (ECM) Removal and Installation

CAUTIONAs ECM consists of precision parts, be careful not to expose it to excessive shock.

Note. If ECM is replaced with either new one or used one, perform the following procedure. See PROCEDURE AFTER ECM REPLACEMENT . Register VIN data to ECM. See VIN REGISTRATION . For vehicle equipped with immobilizer control system, register immobilizer transponder code to ECM. See REGISTRATION OF THE IGNITION KEY . Calibrate throttle valve position. See ELECTRIC THROTTLE CONTROL SYSTEM CALIBRATION .

Scheme 55

Scheme 55: Removal
Scheme 55: Removal
  1. Disconnect negative cable from battery.
  2. Turn lock lever (1) to arrow direction until it stops and then disconnect connectors from ECM.
  3. Remove ECM and cover from bracket by removing their mounting bolts (2).

Installation

Reverse removal procedure noting the following.

Scheme 56

Scheme 56: Installation
Scheme 56: Installation

Scheme 57

Scheme 57
Scheme 57
  1. Connect connectors to ECM as follows. Make sure that lock levers of ECM connector are in unlock positions. Insert ECM connectors to ECM until it stops. Lock ECM connectors securely by setting their lock levers in their locked position.

Scheme 58

Scheme 58: VIN Registration
Scheme 58: VIN Registration
  1. Connect SUZUKI scan tool to data link connector (DLC) (1) located on under side of instrument panel at drive's seat side. Special Tool (A): SUZUKI scan tool (SUZUKI-SDT)
  2. Check the VIN shown on the left side of instrument panel.
  3. Turn ignition switch to ON position.
  4. Select "VIN registration" mode of SUZUKI scan tool.
  5. Register VIN according to the instructions indicated on the SUZUKI scan tool. NOTE: For further details, refer to the operator's manual for SUZUKI scan tool.
  6. Before completed the VIN registration, check that VIN data indicated on the SUZUKI scan tool is correct. If not, re-register VIN data into ECM correctly.

Scheme 59

Scheme 59: Registered VIN Data Check
Scheme 59: Registered VIN Data Check
  1. Connect SUZUKI scan tool to data link connector (DLC) (1) located on underside of instrument panel at driver's seat side. Special Tool (A): SUZUKI scan tool (SUZUKI-SDT)
  2. Turn ignition switch to ON position.
  3. Select "VIN registration" mode of SUZUKI scan tool.
  4. Confirm whether code of 17 digits displayed on SUZUKI scan tool is corresponding to VIN shown on the left side of instrument panel. If displayed VIN does not correspond to instrument panel VIN, register VIN (vehicle identification number) data into ECM referring to «VIN REGISTRATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a) .
  5. Push "EXIT" button of SUZUKI scan tool.

Electric Throttle System On-Vehicle Inspection

WARNINGNever touch throttle valve with finger while ignition switch is in ON position and accelerator pedal is depressed. Otherwise, injury may result by pinching the finger between throttle valve and throttle body.
CAUTIONDo not disassemble throttle body. Do not drop otherwise give excessive shock to throttle body. Throttle body that has experienced any excessive shock must be replaced. Be careful not to accrete foreign materials (like dust and metallic particle) to throttle body and throttle valve. Otherwise, throttle body will break down by throttle valve accretion. Do not apply excessive force to throttle valve for throttle valve operation check and TP sensor performance check. Otherwise, throttle body will break down by damaging internal resinous gear of throttle valve actuator.

Note. After replacing throttle body, calibrate throttle valve position. See ELECTRIC THROTTLE CONTROL SYSTEM CALIBRATION .

Scheme 60

Scheme 60: Electric Throttle Body System Operation Check
Scheme 60: Electric Throttle Body System Operation Check

Scheme 61

Scheme 61
Scheme 61

Scheme 62

Scheme 62
Scheme 62

Scheme 63

Scheme 63
Scheme 63
  1. Turn off ignition switch.
  2. Remove engine cover.
  3. Remove air cleaner outlet hose (1). See «AIR CLEANER ASSEMBLY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a) .
  4. Check that there isn't any foreign matter caught between throttle valve (1) and throttle body (2). If there is, take it out after removing throttle body and clean inside of throttle body thoroughly. See «THROTTLE BODY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a__throttle-body-removal-and-installation) .
  5. Check throttle valve (1) operation as follows. If faulty condition is found, replace throttle body. See «THROTTLE BODY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a__throttle-body-removal-and-installation) . Throttle valve default position "a": 22° - 27° from completely closed position (1) Check that throttle valve (1) moves smoothly from fully closed position to fully open position with your finger. Check that throttle valve returns to default position when you move finger off throttle valve at fully closed position and fully open position.
  6. Turn ignition switch to ON position.
  7. Check electric throttle body system as follows. If faulty condition is found, go to step 8). Depress accelerator pedal gradually and check that throttle valve moves smoothly until it opens fully. Release accelerator pedal and check that throttle valve moves back to default position.
  8. Check the following. If check results are satisfactory, replace throttle body. Wire harness and connections APP sensor. See «ACCELERATOR PEDAL POSITION (APP) SENSOR ON-VEHICLE INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__accelerator-pedal-position-app-sensor-on-vehicle) . TP sensor: Refer to «THROTTLE POSITION (TP) SENSOR PERFORMANCE CHECK»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a) . Throttle actuator: Refer to «THROTTLE ACTUATOR CHECK»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a) .

Scheme 64

Scheme 64: Throttle Actuator Check
Scheme 64: Throttle Actuator Check
  1. Turn off ignition switch.
  2. Disconnect connector from throttle body.
  3. Measure resistance between terminals "1" and "2" of electric throttle body assembly. If faulty condition is found, replace throttle body. See «THROTTLE BODY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a__throttle-body-removal-and-installation) . Throttle actuator resistance 1.7 - 2.1 ohms at 20 °C, 68 °F

Scheme 65

Scheme 65: Throttle Position (TP) Sensor Performance Check
Scheme 65: Throttle Position (TP) Sensor Performance Check

Scheme 66

Scheme 66
Scheme 66
  1. Turn off ignition switch.
  2. Remove air cleaner assembly. See «AIR CLEANER ASSEMBLY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a) .
  3. Remove air cleaner outlet hose.
  4. Disconnect connector from electric throttle body assembly.
  5. Check TP sensor (main and sub) output voltage as follows. If faulty condition is found, replace throttle body. See «THROTTLE BODY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a__throttle-body-removal-and-installation) . Connect three new 1.5 V batteries (1) in series and check that total voltage is 4.5 - 5.0 V. Connect voltmeter (2) and batteries to TP sensor as shown in figure. Check that voltage varies depending on throttle opening angle as shown in figure while throttle valve is opened and closed by finger.

Electric Throttle Control System Calibration

Note. After the following procedure, calibrate throttle position. Shutoff of ECM power supply (i.e. disconnection of battery cable, replacement of battery or blown "ECM" fuse) Replacement of ECM Clearance of DTC related to electric throttle control system Replacement of throttle body

  1. Confirm vehicle condition is as follows. DTC other than P2176 is not detected Engine: Stop Accelerator pedal position: Idle position 5 °C < ECT < 85 °C 5 °C < IAT < 60 °C Battery voltage > 10 V
  2. Select calibration procedure from table below. CALIBRATION PROCEDURE CHART Calibration procedure Service item [A] Shutoff of ECM power supply (i.e. disconnection of battery cable, replacement of battery or blown "ECM" fuse) Replacement of ECM Clearance of DTC related to electric throttle control system [B] Replacement of throttle body
  3. Perform selected calibration procedure as follows. Calibration procedure [A] Keep ignition switch at ON position for 1 min. or more without running engine. Calibration procedure [B] Disconnect negative cable from battery, and then disconnect connectors from ECM for 30 sec. or more in order to clear calibration data of closed throttle position from ECM. Connect negative cable to battery. Keep ignition switch at ON position for 1 min. or more without running engine.
  4. Clear DTC(s).

Accelerator Pedal Position (APP) Sensor On-Vehicle Inspection

CAUTIONDo not drop otherwise give excessive shock to accelerator pedal assembly (incorporating APP sensor). Accelerator pedal assembly (incorporating APP sensor) that has experienced any excessive shock must be replaced. Be careful not to expose sensor section of accelerator pedal assembly (incorporating APP sensor) to water and oil. Do not disassemble accelerator pedal assembly (incorporating APP sensor).

Scheme 67

Scheme 67
Scheme 67
  1. Check that accelerator pedal assembly (incorporating APP sensor) has been mounted to vehicle body properly (no pinched floor carpet, etc.). Reinstall accelerator pedal assembly (incorporating APP sensor) if it is not properly mounted. See «ACCELERATOR PEDAL ASSEMBLY (INCORPORATING APP SENSOR) REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__accelerator-pedal-assembly-incorporating-app-sensor) .
  2. Turn off ignition switch and connect scan tool to DLC. Special Tool : SUZUKI scan tool (SUZUKI-SDT)
  3. Display "Data List" mode.
  4. Check that voltage varies depending on accelerator position as the following graph. If faulty condition is found, check the followings. Wire harness and connections APP sensor. See «ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a) .

Accelerator Pedal Assembly (Incorporating APP Sensor) Removal and Installation

CAUTIONDo not drop otherwise give excessive shock to accelerator pedal assembly (incorporating APP sensor). Accelerator pedal assembly (incorporating APP sensor) that has experienced any excessive shock must be replaced. Be careful not to expose sensor section of accelerator pedal assembly (incorporating APP sensor) to water and oil. Do not disassemble accelerator pedal assembly (incorporating APP sensor).

Removal

  1. Disconnect negative cable from battery.
  2. Disconnect connector from accelerator pedal assembly (incorporating APP sensor).
  3. Remove accelerator pedal assembly (incorporating APP sensor) from its bracket.

Reverse removal procedure for installation noting the following.

Scheme 68

Scheme 68: Installation
Scheme 68: Installation
  1. Tighten accelerator pedal assembly upper nut (1) to specified torque, and then lower nut (2) to specified torque. Tightening torque Accelerator pedal assembly nut* (a): 6 N.m (0.61 kg-m, 4.5 lbf-ft)
  2. Connect connector to APP sensor assembly securely.

Scheme 69

Scheme 69: Accelerator Pedal Position (APP) Sensor Inspection
Scheme 69: Accelerator Pedal Position (APP) Sensor Inspection

Scheme 70

Scheme 70
Scheme 70

Scheme 71

Scheme 71
Scheme 71
  1. Remove accelerator pedal assembly (incorporating APP sensor assembly). See «ACCELERATOR PEDAL ASSEMBLY (INCORPORATING APP SENSOR) REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__accelerator-pedal-assembly-incorporating-app-sensor) .
  2. Check APP sensor output voltage as follows. If faulty condition is found, replace accelerator pedal assembly (incorporating APP sensor assembly). See «ACCELERATOR PEDAL ASSEMBLY (INCORPORATING APP SENSOR) REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__accelerator-pedal-assembly-incorporating-app-sensor) . Connect three new 1.5 V batteries (1) in series, and check that total voltage is 4.5 - 5.0 V. Connect voltmeter (2) and batteries to APP sensor as shown in figure. [A]: APP sensor (main) [B]: APP sensor (sub) Check that voltage varies depending on accelerator opening angle as the following graph.

Scheme 72

Scheme 72: Removal
Scheme 72: Removal
  1. Disconnect negative cable from battery.
  2. Drain coolant. See «COOLING SYSTEM DRAINING»(/suzuki/grand-vitara/ii-2008-2012/remont/cooling-system-mechanical/#engine-cooling-system-n32a__cooling-system-draining) .
  3. Remove engine cover.
  4. Remove oil level gauge and its guide.
  5. Disconnect ECT sensor connector (1).
  6. Remove ECT sensor from cylinder head.

Reverse removal procedure noting the following.

Scheme 73

Scheme 73: Installation
Scheme 73: Installation
  1. Tighten new ECT sensor to specified torque. Tightening torque ECT sensor (a): 22 N.m (2.2 kg-m, 16.5 lbf-ft)
  2. Refill cooling system. See «COOLING SYSTEM FLUSHING»(/suzuki/grand-vitara/ii-2008-2012/remont/cooling-system-mechanical/#engine-cooling-system-n32a__cooling-system-flushing) .
  3. Check for coolant leakage from ECT sensor with engine running.

Engine Coolant Temperature (ECT) Sensor Inspection

Check that resistance between terminals "1" and "2" varies depending on engine coolant temperature.

If faulty condition is found, replace ECT sensor. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL AND INSTALLATION .

ECT sensor resistance

20 °C (-4 °F): 14.1 - 16.8 kohms

20 °C (68 °F): 2.35 - 2.65 kohms

80 °C (176 °F): 0.313 - 0.332 kohms

Scheme 74

Scheme 74: Engine Coolant Temperature (ECT) Sensor Inspection
Scheme 74: Engine Coolant Temperature (ECT) Sensor Inspection

Scheme 75

Scheme 75
Scheme 75

HO2S

  1. Check that HO2S signal is outputted properly. See «INSPECTION OF ECM AND ITS CIRCUITS»(/suzuki/grand-vitara/ii-2008-2012/remont/testing-diagnostics/#engine-general-information-and-diagnosis-n32a) . If faulty condition is found, check the following. Wire harness and connections Exhaust system leakage If check result is good, replace faulty HO2S. See «HEATED OXYGEN SENSOR (HO2S) REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__heated-oxygen-sensor-ho2s-removal-and) .

Scheme 76

Scheme 76: HO2S heater
Scheme 76: HO2S heater

Scheme 77

Scheme 77
Scheme 77
  1. Turn off ignition switch and disconnect HO2S connector.
  2. Check that voltage of HO2S connector (vehicle side) between terminals "1" and "2" is battery voltage when ignition switch is in ON position. If faulty condition is found, check power supply circuit, ground circuit and connections.
  3. Using ohmmeter, measure resistance of HO2S connector (sensor side) of sensor heater between terminals "3" and "4" at sensor connector. If faulty condition is found, replace faulty HO2S. See «HEATED OXYGEN SENSOR (HO2S) REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__heated-oxygen-sensor-ho2s-removal-and) . NOTE: Temperature of sensor affects resistance value largely. Make sure that sensor heater is at correct temperature. HO2S heater resistance 5.0 - 6.4 ohms at 20 °C (68 °F)

Heated Oxygen Sensor (HO2S) Removal and Installation

Note. For identification of each cylinder and bank, refer to PRECAUTION FOR IDENTIFICATION OF CYLINDER AND BANK .

WARNINGTo avoid danger of being burned, do not touch exhaust system when system is hot. HO2S removal should be performed when system is cool.
  1. Disconnect negative cable from battery.
  2. Disconnect connectors of HO2S.
  3. Remove HO2S (1) from exhaust manifolds.

Reverse removal procedure noting the following.

Scheme 78

Scheme 78: Installation
Scheme 78: Installation

Scheme 79

Scheme 79
Scheme 79

Scheme 80

Scheme 80
Scheme 80

Scheme 81

Scheme 81
Scheme 81
  1. Tighten HO2S (1) to specified torque. Tightening torque HO2S (a): 45 N.m (4.5 kg-m, 33.5 lbf-ft) [A]: HO2S-1 (bank-1) [B]: HO2S-1 (bank-2) [C]: HO2S-2 (bank-1) [D]: HO2S-2 (bank-2)
  2. After installation, check exhaust leakage from sensor with engine running.

Scheme 82

Scheme 82: Camshaft Position (CMP) Sensor On-Vehicle Inspection
Scheme 82: Camshaft Position (CMP) Sensor On-Vehicle Inspection
  1. Turn off ignition switch.
  2. Disconnect CMP sensor connector.
  3. Turn ignition switch to ON position and check that voltage of CMP sensor connector (vehicle side) between terminals "1" and "2" is 4 - 6 V. If faulty condition is found, check ECM power supply circuit, ECM ground circuit, wire harness between ECM and CMP sensor and connections.
  4. Check that CMP sensor signal is outputted properly. See «INSPECTION OF ECM AND ITS CIRCUITS»(/suzuki/grand-vitara/ii-2008-2012/remont/testing-diagnostics/#engine-general-information-and-diagnosis-n32a) . If faulty condition is found, check the following. Wire harness and connections CMP sensor. See «CAMSHAFT POSITION (CMP) SENSOR INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__camshaft-position-cmp-sensor-inspection) .

Camshaft Position (CMP) Sensor Removal and Installation

Note. For identification of each cylinder and bank, refer to PRECAUTION FOR IDENTIFICATION OF CYLINDER AND BANK .

  1. Disconnect negative cable from battery.
  2. Disconnect CMP sensor connector.
  3. Remove CMP sensor from timing chain cover.

Scheme 83

Scheme 83: Installation
Scheme 83: Installation

Scheme 84

Scheme 84
Scheme 84
  1. Reverse removal procedure noting the following. Apply engine oil to O-ring of sensor. Tighten new CMP sensor bolt (3) to specified torque. Tightening torque CMP sensor bolt (a): 10 N.m (1.0 kg-m, 7.5 lbf-ft) [A]: Bank-1 [B]: Bank-2 [A]: Bank-1 [B]: Bank-2 1. CMP sensor (sensor 1) 2. CMP sensor (sensor 2)

Camshaft Position (CMP) Sensor Inspection

Scheme 85

Scheme 85: Camshaft Position (CMP) Sensor Inspection
Scheme 85: Camshaft Position (CMP) Sensor Inspection

Scheme 86

Scheme 86
Scheme 86
  1. Remove CMP sensor. See «CAMSHAFT POSITION (CMP) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__camshaft-position-cmp-sensor-removal-and) .
  2. Check the following. Check that O-ring (1) is free from damage. Check that end face of sensor and signal rotor tooth are free from any metal particles and damage.
  3. Check CMP sensor as follows. If faulty condition is found, replace CMP sensor. See «CAMSHAFT POSITION (CMP) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__camshaft-position-cmp-sensor-removal-and) . Connect three new 1.5 V batteries in series and check that total voltage is 4.5 - 5.0 V. Connect batteries (1) and ohmmeter (3) to CMP sensor as shown in figure. Check that CMP sensor resistance varies as specified below by passing magnetic substance (iron) (2). NOTE: Be sure to keep approximately 1 mm (0.03 in) gap "a" between magnetic substance (iron) and end face of CMP sensor. CMP sensor resistance Resistance varies between less than 20 ohms and infinity

Scheme 87

Scheme 87: Crankshaft Position (CKP) Sensor On-Vehicle Inspection
Scheme 87: Crankshaft Position (CKP) Sensor On-Vehicle Inspection

Scheme 88

Scheme 88
Scheme 88
  1. Disconnect connector of CKP sensor wire with ignition switch turned off.
  2. Turn ignition switch to ON position and check that voltage of CKP sensor wire connector (vehicle side) between terminals "1" and "2" is 4 - 6 V. If faulty condition is found, check ECM power supply circuit, ECM ground circuit, wire harness between ECM and CKP sensor wire connector and connections.
  3. Check that CKP sensor signal is outputted properly. See «INSPECTION OF ECM AND ITS CIRCUITS»(/suzuki/grand-vitara/ii-2008-2012/remont/testing-diagnostics/#engine-general-information-and-diagnosis-n32a) . If faulty condition is found, check the following. Wire harness and connections CKP sensor: See «CRANKSHAFT POSITION (CKP) SENSOR INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__crankshaft-position-ckp-sensor-inspection) .

Crankshaft Position (CKP) Sensor Removal and Installation

Note. For identification of each cylinder and bank, refer to PRECAUTION FOR IDENTIFICATION OF CYLINDER AND BANK .

Scheme 89

Scheme 89: Removal
Scheme 89: Removal
  1. Disconnect negative cable from battery.
  2. Remove exhaust manifold. See «EXHAUST MANIFOLD REMOVAL AND INSTALLATION (N32A)»(/suzuki/grand-vitara/ii-2008-2012/remont/exhaust/#engine-exhaust-system__exhaust-manifold-removal-and-installation-n32a) .
  3. Remove bank-1 side engine mounting and bracket. See «ENGINE MOUNTINGS COMPONENTS»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a) .
  4. Disconnect connector (2) from CKP sensor (1) as follows. Pull out lock lever (3) in arrow direction. Disconnect connector from CKP sensor while pushing lock button (4).
  5. Remove CKP sensor (1) from cylinder block.

Reverse removal procedure noting the following.

Scheme 90

Scheme 90: Installation
Scheme 90: Installation
  1. Apply engine oil to O-ring of sensor.
  2. Tighten CKP sensor bolt to specified torque. Tightening torque CKP sensor bolt: 10 N.m (1.0 kg-m, 7.5 lbf-ft) Connect connector and fix wire harness with clamp securely.

Crankshaft Position (CKP) Sensor Inspection

Scheme 91

Scheme 91: Crankshaft Position (CKP) Sensor Inspection
Scheme 91: Crankshaft Position (CKP) Sensor Inspection

Scheme 92

Scheme 92
Scheme 92
  1. Remove CKP sensor. See «CRANKSHAFT POSITION (CKP) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__crankshaft-position-ckp-sensor-removal-and) .
  2. Check the following. Check that O-ring (1) is free from damage. Check that end face of sensor and signal plate tooth are free from any metal particles and damage.
  3. Check CKP sensor as follows. If faulty condition is found, replace CKP sensor. See «CRANKSHAFT POSITION (CKP) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__crankshaft-position-ckp-sensor-removal-and) . Connect three new 1.5 V batteries in series and check that total voltage is 4.5 - 5.0 V. Connect batteries (1) and ohmmeter (3) to CKP sensor as shown in figure. Check that CKP sensor resistance varies as specified below by passing magnetic substance (iron) (2). NOTE: Be sure to keep approximately 1 mm (0.03 in) gap "a" between magnetic substance (iron) and respect to end face of CKP sensor. CKP sensor resistance Resistance varies between less than 20 ohms and infinity

Knock Sensor Removal and Installation

Note. For identification of each cylinder and bank, refer to PRECAUTION FOR IDENTIFICATION OF CYLINDER AND BANK .

Bank-1

  1. Disconnect negative cable from battery.
  2. Remove exhaust manifold. See «EXHAUST MANIFOLD REMOVAL AND INSTALLATION (N32A)»(/suzuki/grand-vitara/ii-2008-2012/remont/exhaust/#engine-exhaust-system__exhaust-manifold-removal-and-installation-n32a) .
  3. Remove engine mounting and bracket. See «ENGINE MOUNTINGS COMPONENTS»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a) .
  4. Disconnect knock sensor connector.
  5. Remove knock sensor (1) from cylinder block.

Bank-2

  1. Disconnect negative cable from battery.
  2. Disconnect knock sensor connector.
  3. Remove knock sensor (1) from cylinder.

Reverse removal procedure noting the following.

Scheme 93

Scheme 93: Installation
Scheme 93: Installation
  1. Tighten knock sensor bolt (2) to specified torque. Tightening torque Knock sensor bolt (a): 23 N.m (2.3 kg-m, 17.0 lbf-ft)

Scheme 94

Scheme 94: Knock Sensor Inspection
Scheme 94: Knock Sensor Inspection
  1. Remove knock sensor. See «KNOCK SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__knock-sensor-removal-and-installation) .
  2. Connect multimeter (1) to knock sensor (2) as shown in figure.
  3. Check that knock sensor resistance and capacitance. If faulty condition is found, replace knock sensor. See «KNOCK SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__knock-sensor-removal-and-installation) . Knock sensor resistance Infinity Knock sensor capacitance 850 - 1150 pF

Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor On-Vehicle Inspection

Note. Before performed this inspection, be sure to read the PRECAUTIONS OF ECM CIRCUIT INSPECTION .

Scheme 95

Scheme 95: Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor On-Vehicle Inspection
Scheme 95: Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor On-Vehicle Inspection
  1. Turn off ignition switch and disconnect MAF & IAT sensor connector.
  2. Check that voltage of MAF & IAT sensor connector (vehicle side) between terminals "1" and "2" is battery voltage when ignition switch is ON. If faulty condition is found, check power supply circuit, ground circuit and connections.
  3. Check that MAF sensor signal is outputted properly. See «INSPECTION OF ECM AND ITS CIRCUITS»(/suzuki/grand-vitara/ii-2008-2012/remont/testing-diagnostics/#engine-general-information-and-diagnosis-n32a) . If faulty condition is found, check the following. Wire harness and connections MAF sensor. See «MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__mass-air-flow-maf-intake) .

Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor Removal and Installation

CAUTIONWhen servicing MAF & IAT sensor, be sure to observe the following items. Do not disassemble MAF & IAT sensor. Do not expose MAF & IAT sensor to any shock. If it has been dropped, it should be replaced. Do not clean MAF & IAT sensor. Do not blow compressed air using air gun or the like. Do not put finger or any other object into MAF & IAT sensor.

Scheme 96

Scheme 96: Removal
Scheme 96: Removal
  1. Disconnect negative cable from battery.
  2. Disconnect MAF & IAT sensor connector (2).
  3. Remove MAF & IAT sensor (1) from air cleaner case (2).

Reverse removal procedure noting the following.

Scheme 97

Scheme 97: Installation
Scheme 97: Installation
  1. Tighten MAF & IAT sensor screws (1) to specified torque. Tightening torque MAF & IAT sensor screw (a): 3 N.m (0.3 kg-m, 2.5 lbf-ft)

Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor Inspection

IAT sensor inspection

CAUTIONWhen servicing MAF & IAT sensor, be sure to observe the following items. Do not disassemble MAF & IAT sensor. Do not expose MAF & IAT sensor to any shock. If it has been dropped, it should be replaced. Do not clean MAF & IAT sensor. Do not blow compressed air by using air gun or the like. Do not put finger or any other object into MAF & IAT sensor. Do not heat MAF & IAT sensor more than 100 °C (212 °F). Otherwise, MAF & IAT sensor will be damaged.

Scheme 98

Scheme 98
Scheme 98

Scheme 99

Scheme 99
Scheme 99
  1. Remove MAF & IAT sensor. See «MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__mass-air-flow-maf-intake) .
  2. Check sensor O-ring (1) for damage and deterioration. Replace as necessary.
  3. Measure resistance between sensor terminals while blowing hot air to temperature sensing part (2) of MAF & IAT sensor (3) using hot air drier (4). If faulty condition is found, replace MAF & IAT sensor. See «MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__mass-air-flow-maf-intake) . Intake air temperature sensor resistance -20 °C (-4 °F): 12.6 - 15.1 kohms 20 °C (68 °F): 2.29 - 2.55 kohms 80 °C (176 °F): 0.312 - 0.370 kohms

Scheme 100

Scheme 100: MAF sensor inspection
Scheme 100: MAF sensor inspection

Scheme 101

Scheme 101
Scheme 101

Scheme 102

Scheme 102
Scheme 102
  1. Remove MAF & IAT sensor. See «MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__mass-air-flow-maf-intake) .
  2. Connect three new 1.5 V batteries in series and check that total voltage is 4.5 - 5.0 V
  3. Connect 12 V battery (1), 1.5 V batteries (2) and 1.2 kohms resister (3) to MAF sensor as shown in figure.
  4. Connect oscilloscope (5) or multimeter (4) to MAF sensor as shown in figure.
  5. Check that waveform or frequency varies depending on amount of blowing air to air intake vent (6) using oscilloscope or frequency range of multimeter. If faulty condition is found, replace MAF & IAT sensor. See «MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/engine-control-systems/#engine-electrical-devices-n32a__mass-air-flow-maf-intake) . MAF sensor waveform (reference) Calm: Blowing

OCV Removal and Installation

Scheme 103

Scheme 103: OCV Inspection
Scheme 103: OCV Inspection

Scheme 104

Scheme 104
Scheme 104

Scheme 105

Scheme 105
Scheme 105
  1. Remove OCV. See «OCV REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-n32a) . Check OCV as follows. If faulty condition is found, replace OCV. Check that surface of strainer part (1) is not clog get and free from foreign material. Check that surface of OCV is free from damage.
  2. Check OCV as follows. If faulty condition is found, replace OCV. Measure resistance between terminals. If resistance is within specification, go to step b). OCV resistance 7.15 - 7.25 ohms at 20 °C (68 °F) Connect 12 V battery to terminals, and then confirm actuation of spool (1). CAUTION: Do not apply voltage to OCV for 5 sec. or more. Otherwise, coil of OCV will be damaged. To avoid over-current caused by short circuit in OCV, use circuit fuse (2) into circuit between battery positive terminal and OCV terminal.

Scheme 106

Scheme 106: Main Relay (Single Type Relay)
Scheme 106: Main Relay (Single Type Relay)

Scheme 107

Scheme 107
Scheme 107
  1. Disconnect negative cable from battery.
  2. Remove main relay (1) from fuse box (2).
  3. Check that there is no continuity between terminal "C" and "D". If there is continuity, replace relay.
  4. Connect battery positive (+) terminal to terminal "B" of relay. Connect battery negative (-) terminal to terminal "A" of relay. Check for continuity between terminal "C" and "D". If there is no continuity when relay is connected to the battery, replace defective relay.

Scheme 108

Scheme 108: HO2S Heater Relay (Integration Type Relay)
Scheme 108: HO2S Heater Relay (Integration Type Relay)
  1. Disconnect negative cable from battery.
  2. Remove integration relay No. 2 (1) from fuse box (2).
  3. Check that there is no continuity between terminals "[A]-1" and "[B]-8" of relay. If there is continuity, replace relay.
  4. Connect battery positive (+) terminal to "[B]-7" terminal of relay. Connect battery negative (-) terminal to "[B]-6" terminal of relay. Check for continuity between terminal "[A]-1" and "[B]-8". If there is no continuity when relay is connected to the battery, replace integration relay No. 2.

Radiator Cooling Fan Relay No. 1/No. 2/No. 3

Fuel Pump Relay

Starting Motor Relay

Tightening Torque Specifications

CAUTIONFor fastener with * (asterisk) below, be sure to tighten it according to specified procedure in "Repair Instructions".
Fastening partTightening torque
N.mKgf-mLbf-ft
Accelerator pedal assembly nut*60.614.5
ECT sensor222.216.5
HO2S454.533.5
CMP sensor bolt101.07.5
CKP sensor bolt101.07.5
Knock sensor bolt232.317.0
MAF & IAT sensor screw30.32.5

TIGHTENING TORQUE SPECIFICATIONS

Reference

For the tightening torque of fastener not specified in this information, refer to FASTENER INFORMATION .

Special Tool

SPECIAL TOOL CHART SUZUKI scan tool (SUZUKI-SDT) - This kit includes following items. SUZUKI-SDT DLC3 cable USB cable AC/DC power supply Voltage meter probe Storage case

Scheme 109

Scheme 109: Special Tool
Scheme 109: Special Tool

See also:
• PROCEDURE AFTER ECM REPLACEMENT
• REGISTRATION OF THE IGNITION KEY
• AIR CLEANER ASSEMBLY REMOVAL AND INSTALLATION
• THROTTLE BODY REMOVAL AND INSTALLATION
• COOLING SYSTEM DRAINING
• COOLING SYSTEM FLUSHING
• INSPECTION OF ECM AND ITS CIRCUITS
• EXHAUST MANIFOLD REMOVAL AND INSTALLATION (N32A)
• RADIATOR COOLING FAN RELAY INSPECTION
• FUEL PUMP RELAY INSPECTION
• STARTING MOTOR CONTROL RELAY INSPECTION
• FASTENER INFORMATION
• VIN REGISTRATION
• ELECTRIC THROTTLE CONTROL SYSTEM CALIBRATION
• ACCELERATOR PEDAL POSITION (APP) SENSOR ON-VEHICLE INSPECTION
• ACCELERATOR PEDAL ASSEMBLY (INCORPORATING APP SENSOR) REMOVAL AND INSTALLATION
• HEATED OXYGEN SENSOR (HO2S) REMOVAL AND INSTALLATION
• CAMSHAFT POSITION (CMP) SENSOR INSPECTION
• CAMSHAFT POSITION (CMP) SENSOR REMOVAL AND INSTALLATION
• CRANKSHAFT POSITION (CKP) SENSOR INSPECTION
• CRANKSHAFT POSITION (CKP) SENSOR REMOVAL AND INSTALLATION
• KNOCK SENSOR REMOVAL AND INSTALLATION
• MASS AIR FLOW (MAF) & INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION

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