1A-42 Engine General Information and Diagnosis:
CANIST PRG DUTY (EVAP CANISTER PURGE FLOW
DUTY, %)
This parameter indicates valve ON (valve open) time
rate within a certain set cycle of EVAP canister purge
valve which controls the amount of EVAP purge.
IGNITION ADVANCE (IGNITION TIMING ADVANCE
FOR NO.1 CYLINDER, °)
Ignition timing of No.1 cylinder is commanded by ECM.
The actual ignition timing should be checked by using
the timing light.
EGR VALVE OPENING (%)
This parameter indicates opening rate of EGR valve
which controls the amount of EGR flow.
VVT GAP (TARGET-ACTUAL POSITION, °) (VVT
model)
It is calculated using the formula: target valve timing
advance – actual valve timing advance.
FUEL PUMP (ON/OFF)
ON is displayed when ECM activates the fuel pump via
the fuel pump relay switch.
STARTER SW (STARTER SWITCH, ON/OFF)
This parameter indicates condition of starting motor relay
output.
ON: Starting motor relay is ON
OFF: Starting motor relay is OFF
A/C PRESSURE (A/C REFRIGERANT ABSOLUTE
PRESSURE, kPa)
This parameter indicates A/C refrigerant absolute
pressure calculated by ECM.
A/C SWITCH (ON/OFF)
ON: Command for A/C operation being output from ECM
to HVAC.
OFF: Command for A/C operation not being output.
A/C COMP RELAY (A/C COMPRESSOR RELAY, ON/
OFF)
This parameter indicates the state of the A/C switch.
BLOWER FAN (ON/OFF)
This parameter indicates the state of the blower fan
motor switch.
ELECTRIC LOAD (ON/OFF)
ON: Headlight or small light ON signal inputted.
OFF: Above electric loads all turned OFF.
RADIATOR COOLING FAN (RADIATOR COOLING
FAN CONTROL RELAY, ON/OFF)
ON: Command for radiator cooling fan control relay
operation being output.
OFF: Command for relay operation not being output.
A/C COND FAN (A/C CONDENSER COOLING FAN
CONTROL RELAY, ON/OFF)
ON: Command for A/C condenser cooling fan control
relay operation being output.
OFF: Command for relay operation not being output.
TP SENSOR 1 VOLT (THROTTLE POSITION SENSOR
(MAIN) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Main) reading provides
throttle valve opening information in the form of voltage.
TP SENSOR 2 VOLT (THROTTLE POSITION SENSOR
(SUB) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Sub) reading provides
throttle valve opening information in the form of voltage.
APP SENSOR 1 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (MAIN) OUTPUT
VOLTAGE, V)
The Accelerator Pedal Position (APP) Sensor (Main)
reading provides accelerator pedal opening information
in the form of voltage.
APP SENSOR 2 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (SUB) OUTPUT VOLTAGE,
V)
The Accelerator Pedal Position (APP) Sensor (Sub)
reading provides accelerator pedal opening information
in the form of voltage.
ACCEL POSITION (RELATIVE ACCELERATOR
PEDAL POSITION, %)
When accelerator pedal is at fully released position,
accelerator pedal is indicated as 0 – 3% and 90 – 100%
fully depressed position.
TARGET THROTTLE POSI (TARGET THROTTLE
VALVE POSITION, %)
Target Throttle Valve Position is ECM internal parameter
which indicates the ECM requested throttle valve
position.
IAC THROTTLE OPENING (IDLE AIR (SPEED)
CONTROL THROTTLE VALVE OPENING, %)
This parameter indicates throttle valve opening of idle air
control in %.
(100% indicates the maximum idle air flow.)
THROTTLE MOTOR VOLT (V)
This parameter indicates power supply voltage of throttle
actuator (motor) control circuit (input voltage from
throttle actuator control relay).
CLOSED THROTTLE POS (CLOSED THROTTLE
POSITION, ON/OFF)
This parameter reads ON when throttle valve is fully
closed, or OFF when it is not fully closed.
Need help?
Do you have a question about the SX4 and is the answer not in the manual?
Questions and answers
Adjust throttle motor
The idle speed on a Suzuki SX4 should be controlled by the Idle Air Control Valve (IACV) rather than adjusting the idle screw on the throttle body, as the screw is factory set. Before using compressed air in the idle-air-bypass passages, the IACV should be removed to prevent damage to its delicate mechanism. If there is an issue with idle speed, checking the IACV function and referring to the SX4 service manual is recommended.
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I have an issue of crank but not starting When I scan it brought this codeU0100 Which means no communication thou crank sensor wire was cut off but it was fix back What could be wrong and what could be the solution,
increasing revs when changing gears
The Suzuki SX4 may have increasing revs when changing gears due to its drive-by-wire system and the difference in final drive ratios between the manual (4.41) and automatic (2.81) transmissions. This difference causes high cruising RPMs in the manual version and sluggishness in the automatic. Additionally, if the revs climb while going uphill, it may be due to the transmission downshifting or kicking out of overdrive. Other possible causes include low transmission fluid, abuse, or a faulty transmission design.
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My heater stopped working the blower **** is good, control unit ?
Possible issues with the heater in a Suzuki SX4 if the blower is working but the heater is not include:
1. Incorrect Temperature Output
- Temperature control cable broken or bent (non-A/C and manual A/C) → Check the temperature control cable.
- Temperature selector faulty (non-A/C and manual A/C) → Check the temperature selector.
- Incorrect installation of the temperature control cable (non-A/C and manual A/C) → Check and adjust the position as necessary.
- Temperature control door assembly broken → Repair the temperature control door assembly.
- Air ducts clogged → Repair air ducts.
- Heater core leaked or clogged → Replace the heater core.
- Heater hoses leaked or clogged → Replace heater hoses.
- Thermostat faulty → Check the thermostat.
- Temperature control actuator faulty (auto A/C) → Check the temperature control actuator.
- HVAC control module faulty (auto A/C) → Check the HVAC control module.
- Wiring or grounding faulty (auto A/C) → Repair as necessary.
2. Other Possible Causes
- Air flow control cable broken or bent → Check the air flow control cable.
Checking and addressing these components should help identify and resolve the heater issue.
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