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Ignition System (n32a) Suzuki Grand Vitara II рестайлинг

Ignition System 8 illustrations ~899 words

Ignition System Construction

The N32A engine uses an electronic ignition system ignition system that has neither distributor nor high-tension cords. It consists of the following

  1. ECM ECM monitors engine and vehicle conditions through the signals from the relevant sensors, determines the most suitable ignition timing and sends correct signals to ignition coil assemblies.
  2. Ignition coil assemblies The ignition coil assembly is a combination of an ignitor and ignition coils. It is provided for each cylinder and the ignition coils fit directly over each spark plug. The current to the primary coil is turned on and off according to signal from the ECM. When the current flowing through the primary coil is broken, a high voltage is induced in the secondary coil. The high voltage is applied directly to the spark plug of each cylinder.
  3. Spark plugs
  4. CMP (Camshaft position) sensor and CKP (Crankshaft position) sensor Using signals from these sensors, ECM identifies a specific cylinder whose piston is in the compression stroke, detects the crank angle and adjusts the initial ignition timing automatically. ECM optimally controls the ignition timing also using signals from other sensors/switches in addition to signals from CMP and CKP sensors

Ignition System Wiring Circuit Diagram

Note. For identification of each cylinder and bank, refer to PRECAUTIONS FOR IDENTIFICATION OF CYLINDER: J24B .

Scheme 9

Scheme 9: Ignition System Wiring Circuit Diagram
Scheme 9: Ignition System Wiring Circuit Diagram

Scheme 10

Scheme 10: Ignition System Component Location
Scheme 10: Ignition System Component Location

Ignition System Check

StepActionYESNO
1Was "Engine and Emission Control System Check" performed?Go to Step 2.Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK: N32A .
2Ignition spark test 1 Perform ignition spark test, IGNITION SPARK TEST . Is test result satisfactory?Go to Step 3.Go to Step 4.
3Ignition timing check Check ignition timing, IGNITION TIMING INSPECTION . Is check result satisfactory?Ignition system is in good condition.Repair or replace malfunction part, IGNITION TIMING INSPECTION .
4Confirmation of malfunction-detected cylinder Confirm any cylinder which shows malfunction in ignition spark test. Are there malfunctions in all cylinders?Go to Step 7.Go to Step 5.
5Ignition spark test 2 Replace spark plug in malfunction-detected cylinder one with spark plug of normal cylinder. Perform ignition spark test on spark plug installed in malfunction-detected cylinder, IGNITION SPARK TEST . Is test result satisfactory?Replace spark plug in malfunction-detected cylinder, SPARK PLUG REMOVAL AND INSTALLATION .Go to Step 6.
6Ignition spark test 3 Replace ignition coil assembly of malfunction-detected cylinder with an ignition coil assembly of normal cylinder. Perform ignition spark test on spark plug in malfunction-detected cylinder, IGNITION SPARK TEST . Is test result satisfactory?Replace ignition coil in malfunction-detected cylinder, IGNITION COIL ASSEMBLY REMOVAL AND INSTALLATION .Go to Step 7.
7Ignition coil assembly power supply and ground circuit check Check ignition coil power supply circuit (A1 - A6) and ignition coil ground signal circuit (C1 - C6) of ignition coil assembly for open, short and poor connection. Are circuits in good condition?Go to Step 8.Repair or replace malfunctioning part.
8Ignition coil assembly control circuits check Check ignition coil control circuit (B1 - B6) for open, short circuit and poor connection. Are circuits in good condition?Go to Step 9.Repair or replace malfunctioning part.
9CKP sensor and CMP sensor check Check CKP sensor and CMP sensor. CKP sensor: CKP (CRANKSHAFT POSITION) SENSOR INSPECTION CMP sensor: CAMSHAFT POSITION (CMP) SENSOR INSPECTION Are check results satisfactory?Substitute a known-good ECM and recheck.Replace CKP sensor or CMP sensor.

DIAGNOSTIC INFORMATION CHART

Scheme 11

Scheme 11: Ignition Spark Test
Scheme 11: Ignition Spark Test
  1. Remove engine cover. CAUTION: When removing engine cover, be sure to lift up its front end to prevent breakage of engine cover claws.
  2. Remove air cleaner outlet hose.
  3. Remove intake upper manifold, see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-j24b__intake-manifold-removal-and-installation) .
  4. Disconnect all fuel injector connectors from injectors. WARNING: Be sure to disconnect injector connectors. Without disconnection of injector connectors, combustible gas may come out from spark plug holes during this test and may get ignited in engine room.
  5. Install intake upper manifold, see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/mechanical/#engine-mechanical-j24b__intake-manifold-removal-and-installation) .
  6. Remove spark plug and check it for condition and type, see «SPARK PLUG INSPECTION»(/suzuki/grand-vitara/ii-2008-2012/remont/ignition-system/#ignition-system-n32a__spark-plug-inspection) .
  7. If check result is OK, connect ignition coil connector (1) to ignition coil assembly (2) and connect spark plug (3) to ignition coil assembly. Ground spark plug.
  8. Crank engine and check if each spark plug sparks.
  9. If any spark plug does not produce sparks, inspect ignition system parts, see «IGNITION SYSTEM CHECK»(/suzuki/grand-vitara/ii-2008-2012/remont/ignition-system/#ignition-system-n32a__ignition-system-check) .

Removal

  1. Remove ignition coil assemblies, see «IGNITION COIL ASSEMBLY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/ignition-system/#ignition-system-n32a) .
  2. Remove spark plugs.

Installation

  1. Install spark plugs and tighten them to specified torque. Spark plug type : ACDelco 41-990 (platinum) Tightening torque Spark plug: 18 N.m (1.8 kg-m, 13.5 lbf-ft)
  2. Install ignition coil assemblies, see «IGNITION COIL ASSEMBLY REMOVAL AND INSTALLATION»(/suzuki/grand-vitara/ii-2008-2012/remont/ignition-system/#ignition-system-n32a) .

Spark Plug Inspection

CAUTIONWhen servicing an iridium/platinum spark plug, do not touch the center electrode. The center electrode on this type of spark plug is slender and can be damaged if a mechanical force is applied. Do not clean or adjust gap for iridium/platinum spark plugs.

Inspect spark plug for

  1. Electrode wear
  2. Carbon deposits
  3. Insulator damage
  4. Spark plug air gap

If any abnormality is found, replace it with new plug.

Spark plug air gap "a"

1.1 - 1.2 mm (0.043 - 0.047 in.)

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13: Removal
Scheme 13: Removal
  1. Disconnect negative cable from battery.
  2. Remove engine cover. CAUTION: When removing engine cover, be sure to lift up its front end to prevent breakage of engine cover claws.
  3. Remove air cleaner outlet hose.
  4. Disconnect ignition coil connectors.
  5. Remove ignition coil bolts (1) and then pull out ignition coil assembly (2).

Scheme 14

Scheme 14: Installation
Scheme 14: Installation
  1. Install ignition coil assembly (2).
  2. Tighten ignition coil bolts (1) to specified torque, and then connect ignition coil connectors. Tightening torque Ignition coil bolt (a): 10 N.m (1.0 kg-m, 7.5 lbf-ft)
  3. Install air cleaner outlet hose.
  4. Install engine cover.
  5. Connect negative cable to battery.

Ignition Coil Assembly Inspection

Check ignition coil assembly for the following

  1. Damage
  2. Deterioration
  3. Corrosion of terminal

If any abnormality is found, replace ignition coil assembly.

Ignition Timing Inspection

Note. Ignition timing is not adjustable. If ignition timing is out of specification, check ignition system related parts. Before starting engine, place select lever in "P" range, and set parking brake.

Scheme 15

Scheme 15: Ignition Timing Inspection
Scheme 15: Ignition Timing Inspection
  1. Connect SUZUKI scan tool to DLC (1) with ignition switch in OFF position. Special Tool (A): SUZUKI scan tool (SUZUKI-SDT)
  2. Start engine and warm it up to normal operating temperature.
  3. Make sure that all electrical loads except ignition are turned off.
  4. Make be sure that idle speed conforms to specification.
  5. Check ignition timing using scan tool. ignition timing Standard: 5 ± 3° BTDC (at specified idle speed) Ignition order 1 - 2 - 3 - 4 - 5 - 6
  6. If ignition timing is out of specification, check the following. CKP sensor CKP sensor plate TP sensor CMP sensor VVT system Knock sensor
  7. Check that increasing engine speed advances ignition timing. If check results are not satisfactory, check CKP sensor and ECM.

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
Spark plug181.813.5
Ignition coil bolt101.07.5

TIGHTENING TORQUE SPECIFICATIONS

Reference

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

Special Tool

SPECIAL TOOL REFERENCE 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 16

Scheme 16: Special Tool
Scheme 16: Special Tool

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