Vehicle Precautions
PRECAUTIONS FOR CATALYTIC CONVERTERFor vehicles equipped with a catalytic converter, use only unleaded gasoline and be careful not to let a large amount of unburned gasoline enter the converter or it can be damage.
- Conduct a spark jump test only when necessary, make it as short as possible, and do not open the throttle.
- Conduct engine compression checks within the shortest possible time.
- Avoid situations which can result in engine misfire (e.g. starting the engine when the fuel tank is nearly empty.)
PRECAUTION FOR CAN COMMUNICATION SYSTEM
- The loose (1) in the wire harnesses twist of the CAN lines except around the connector (3) should be within 100 mm (3.9 in.). Refer to the wiring diagram for the CAN lines discrimination. Excessively-loosed lines may be influenced by the electric noise.
- Do not connect terminals of the CAN line using a bypass wire (1). Otherwise, the CAN line may be influenced by the electric noise.
PRECAUTIONS FOR ELECTRICAL CIRCUIT SERVICE
- When replacing a fuse, make sure to use a fuse of the specified capacity. Use of a fuse with a larger capacity will cause a damage to the electrical parts and a fire.
- When disconnecting and connecting coupler, make sure to turn ignition switch OFF, or electronic parts may get damaged.
- When disconnecting connectors, never pull the wiring harnesses. Unlock the connector lock first and then pull them apart by holding connectors themselves.
- When connecting connectors, also hold connectors and put them together until they lock securely (a click is heard).
- When installing the wiring harness, fix it with clamps so that no slack is left.
- When installing vehicle parts, be careful so that the wiring harness is not interfered with or caught by any other part.
- To avoid damage to the harness, protect its part which may contact against a part forming a sharp angle by winding tape or the like around it.
- Be careful not to touch the electrical terminals of parts which use microcomputers (e.g.electronic control unit like as ECM, PCM, P/S controller, etc.). The static electricity from your body can damage these parts.
- Never connect any tester (voltmeter, ohmmeter, or whatever) to electronic control unit when its coupler is disconnected. Attempt to do it may cause damage to it.
- Never connect an ohmmeter to electronic control unit with its coupler connected to it. Attempt to do it may cause damage to electronic control unit and sensors.
- Be sure to use a specified voltmeter / ohmmeter. Otherwise, accurate measurements may not be obtained or personal injury may result. If not specified, use a voltmeter with high impedance (M &/V minimum) or a digital type voltmeter.
- When taking measurements at electrical connectors using a tester probe, be sure to insert the probe (2) from the wire harness side (backside) of the connector (1).
- When connecting meter probe (2) from terminal side of coupler (1) because it can't be connected from harness side, use extra care not to bend male terminal of coupler of force its female terminal open for connection. In case of such coupler as shown connect probe as shown to avoid opening female terminal. Never connect probe where male terminal is supposed to fit.
- When checking connection of terminals, check its male half for bend and female half for excessive opening and both for locking (looseness), corrosion, dust, etc.
- Before measuring voltage at each terminal, check to make sure that battery voltage is 11 V or higher. Such terminal voltage check at low battery voltage will lead to erroneous diagnosis.
PRECAUTIONS FOR INSTALLING MOBILE COMMUNICATION EQUIPMENT
When installing mobile communication equipment such as CB (Citizens-Band)-radio or cellular-telephone, be sure to observe the following precautions. Failure to follow cautions may adversely affect electronic control system.
- Keep the antenna as far away as possible from the vehicle s electronic control unit.
- Keep the antenna feeder more than 20 cm (7.9 in.) away from electronic control unit and its wire harnesses.
- Do not run the antenna feeder parallel with other wire harnesses.
- Confirm that the antenna and feeder are correctly adjusted.
AIR BAG WARNING
WARNING: For vehicles equipped with a Supplemental Restraint (Air Bag) System:
- Service on and around the air bag system components or wiring must be performed only by an authorized SUZUKI dealer. Refer to Air Bag System Components, Wiring and Connectors Location:H25 Engine Model or Air Bag System Components, Wiring and Connectors Location:H27 Engine Model (Advanced Air Bag) in order to confirm whether you are performing service on or near the air bag system components or wiring. Please observe all WARNINGS and Precautions on Service and Diagnosis of Air Bag System:H25 Engine Model or Precautions on Service and Diagnosis of Air Bag System:H27 Engine Model (Advanced Air Bag) before performing service on or around the air bag system components or wiring. Failure to follow "WARNING"s could result in unintentional activation of the system or could render the system inoperative. Either of these two conditions may result in severe injury.
- Technical service work must be started at least 90 seconds after the ignition switch is turned to the "LOCK" position and the negative cable is disconnected from the battery. Otherwise, the system may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
A/C SYSTEM CAUTION
CAUTION: The air conditioning system of this vehicle uses refrigerant HFC-134a (R-134a). None of refrigerant, compressor oil and component parts is interchangeable between two types of A/C: one using refrigerant CFC-12 (R-12) and the other using refrigerant HFC-134a (R-134a). Be sure to check which refrigerant is used before any service work including inspection and maintenance. For identification between these two types, refer to A/C Refrigerant Type Description:Manual Type or A/C Refrigerant Type Description:Automatic Type.
When replenishing or changing refrigerant and compressor oil and when replacing parts, make sure that the material or the part to be used is appropriate to the A/C installed in the vehicle being serviced. Use of incorrect one will result in leakage of refrigerant, damage in parts or other faulty condition.
FASTENER CAUTION
CAUTION: When fasteners are removed, always reinstall them at the same location from which they were removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may be used. Fasteners that are not reused, and those requiring threadlocking compound, will be called out. The correct torque value must be used when installing fasteners that require it. If the above procedures are not followed, parts or system damage could result.
SUSPENSION CAUTION
CAUTION:
- All suspension fasteners are an important attaching part in that it could affect the performance of vital parts and systems, and/or could result in major repair expense. They must be replaced with one of the same part number or with an equivalent part if replacement becomes necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to assure proper retention of this part.
- Never attempt to heat, quench or straighten any suspension part. Replace it with a new part or damage to the part may result.
BRAKES CAUTION AND NOTE
CAUTION: All brake fasteners are important attaching parts in that they could affect the performance of vital parts and systems, and / or could result in major repair expense. They must be replaced with one of same part number or with an equivalent part if replacement becomes necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to assure proper retention of all parts. There is to be no welding as it may result in extensive damage and weakening of the metal.
NOTE: Before inspecting and servicing brakes for vehicle equipped with ABS, make sure that ABS is in good condition.
DIFFERENTIAL GEAR OIL NOTE
NOTE:
- When having driven through water, check immediately if water has entered (if so, oil is cloudy). Water mixed oil must be changed at once.
- Whenever vehicle is hoisted for any other service work than oil change, also be sure to check for oil leakage and status of breather hoses.
SPARE TIRE CAUTION FOR VEHICLE EQUIPPED WITH TPMS
When using a spare tire as a running wheel, be sure to re-register ID codes of all tire pressure sensors. Otherwise, low pressure warning light will flash. For the details, refer to Precautions in Wheels and Tires Servicing.
WHEEL AND TIRE CAUTION
CAUTION:
- All wheel fasteners are important attaching parts in that they could affect the performance of vital parts and systems, and/or could result in major repair expense. They must be replaced with one of the same part number or with an equivalent part if replacement becomes necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to assure proper retention of all parts. There is to be no welding as it may result in extensive damage and weakening of the metal.
- For vehicle equipped with TPMS, be sure to read Precautions in Wheels and Tires Servicing before servicing wheel and/or tire (including spare tire) and observe it. Otherwise, system malfunction may result.
EVAP LEAK CHECK SYSTEM NOTE
NOTE: For vehicle equipped with EVAP leak check module, operating sound of EVAP leak detection pump and cruise control actuator may be heard for several minutes even when ignition switch is turned to OFF position. But, this is normal operation for EVAP leak check. (For the details, refer to EVAP Leak Check System Description:H27 Engine.)
ELECTRICAL CIRCUIT INSPECTION PROCEDURE
While there are various electrical circuit inspection methods, described here is a general method to check its open and short circuit by using an ohmmeter and a voltmeter.
Open Circuit Check
Possible causes for the open circuit are as follows. As the cause is in the connector or terminal in many cases, they need to be checked particularly carefully.
- Loose connection of connector
- Poor contact of terminal (due to dirt, corrosion or rust on it, poor contact tension, entry of foreign object etc.)
- Wire harness being open When checking system circuits including an electronic control unit such as ECM, TCM, ABS control module, etc., it is important to perform careful check, starting with items which are easier to check.
1. Disconnect negative cable from battery
2. Check each connector at both ends of the circuit being checked for loose connection. Also check lock condition of connector if equipped with connector lock.
3. Using a test male terminal, check both terminals of the circuit being checked for contact tension of its female terminal. Check each terminal visually for poor contact (possibly caused by dirt, corrosion, rust entry of foreign object, etc.). At the same time, check to make sure that each terminal is locked in the connector fully.
4. Using continuity check or voltage check procedure, check the wire harness for open circuit and poor connection with its terminals. Locate abnormality, if any.
Continuity check
1. Measure resistance between connector terminals at both ends of the circuit being checked (between "A-1" and "C-1" in the figure). If no continuity is indicated (infinity or over limit), that means that the circuit is open between terminals "A-1" and "C-1".
2. Disconnect the connector included in the circuit (connector-B in the figure) and measure resistance between terminals "A-1" and "B-1". If no continuity is indicated, that means that the circuit is open between terminals "A-1" and "B-1". If continuity is indicated, there is an open circuit between terminals "B-1" and "C-1" or an abnormality in connector-B.
Voltage check
If voltage is supplied to the circuit being checked, voltage check can be used as circuit check.
1. With all connectors connected and voltage applied to the circuit being checked, measure voltage between each terminal and body ground.
a. If measurements were taken as shown in figure and results were as listed below, it means that the circuit is open between terminals "B-1" and "A-1".
Voltage between each terminal and body ground
"C-1" and body ground: Approx. 5 V
"B-1" and body ground: Approx. 5 V
"A-1" and body ground: 0 V
b. Also, if measured values were as listed below, it means that there is a resistance (abnormality) of such level that corresponds to the voltage drop in the circuit between terminals "A-1" and "B-1".
Voltage between
"C-1" and body ground: Approx. 5 V
"B-1" and body ground: Approx. 5 V
"A-1" and body ground: Approx. 3 V
"A-1" and "B-1": 2 V voltage drop
Short Circuit Check (Wire Harness to Ground)
1. Disconnect negative cable from battery.
2. Disconnect connectors at both ends of the circuit to be checked.
NOTE: If the circuit to be checked is connected to other parts, disconnect all connectors of those parts. Otherwise, diagnosis will be misled.
3. Measure resistance between terminal at one end of circuit ("A-1" terminal in figure) and body ground. If continuity is indicated, it means that there is a short to ground between terminals "A-1" and "C-1" of the circuit.
4. Disconnect the connector included in circuit (connector B) and measure resistance between "A-1" and body ground. If continuity is indicated, it means that the circuit is shorted to the ground between terminals "A-1" and "B-1".
INTERMITTENT AND POOR CONNECTION INSPECTION
Most intermittent are caused by faulty electrical connections or wiring, although a sticking relay or solenoid can occasionally be at fault. When checking it for proper connection, perform careful check of suspect circuits for:
- Poor mating of connector halves, or terminals not fully seated in the connector body (backed out).
- Dirt or corrosion on the terminals. The terminals must be clean and free of any foreign material which could impede proper terminal contact. However, cleaning the terminal with a sand paper or the like is prohibited.
- Damaged connector body, exposing the terminals to moisture and dirt, as well as not maintaining proper terminal orientation with the component or mating connector.
- Improperly formed or damaged terminals. Check each connector terminal in problem circuits carefully to ensure good contact tension by using the corresponding mating terminal. If contact tension is not enough, reform it to increase contact tension or replace.
- Poor terminal-to-wire connection. Check each wire harness in problem circuits for poor connection by shaking it by hand lightly. If any abnormal condition is found, repair or replace.
- Wire insulation which is rubbed through, causing an intermittent short as the bare area touches other wiring or parts of the vehicle.
- Wiring broken inside the insulation. This condition could cause continuity check to show a good circuit, but if only 1 or 2 strands of a multi-strand-type wire are intact, resistance could be far too high. If any abnormality is found, repair or replace.