Leak Detector: Testing and Inspection
EVAP Leak Check Module InspectionCheck each component as follows.
CAUTION:
- Do not remove EVAP leak check module from EVAP canister otherwise EVAP canister could become damaged.
- When measuring circuit voltage at ECM connector, connect the special tool to ECM and ECM connectors referring to Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters It is strictly prohibited to connect ohmmeter to ECM with ECM connectors disconnected from it.
NOTE: For operation of EVAP leak check module, refer to EVAP Leak Check System Description.
EVAP Canister Vent valve On-Vehicle Inspection
WARNING: Do not apply vacuum hose directly to your mouth; otherwise harmful fuel vapor may be breathed in.
CAUTION: When checking EVAP canister vent valve, do not apply compressed air. Compressed air could damage EVAP leak check module and cause fuel vapor leaks.
1. With ignition mode of keyless push start system in "OFF", connect special tool between ECM and ECM connectors. For connecting procedure, refer to Step 1) and 2) of "Voltage Check" under Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters
2. Check coil resistance of EVAP canister vent valve between "E01-1" terminal and "E01-59" terminal of ECM connector.
Coil resistance of EVAP canister vent valve
25 - 30 ohms at 20 °C (68 °F)
If resistance is as specified, proceed next step. If not, check wire harness and connections.
If check results of wire harness and connections are OK, replace EVAP leak check module and EVAP canister as assembly.
3. Disconnect filler pipe, purge pipe and suction pipe from EVAP leak check module and EVAP canister.
4. Blow compressed air (1) (2.0 kPa (0.02 kgf/cm2, 0.29 psi, 0.02 bar)) into air port (2). Air should come out of filler port (3) so purge port (4).
If air does not come out, replace EVAP leak check module and EVAP canister as assembly.
5. Close EVAP canister vent valve in EVAP leak check module as follows. If you have SUZUKI scan tool, perform step a). If not, perform step b).
a. Method using SUZUKI scan tool:
i. With ignition mode of keyless push start system in "OFF", connect SUZUKI scan tool to DLC (1).
ii. Push engine switch to change the ignition mode to "ON", and select "Active Test" mode on SUZUKI scan tool.
iii. Close EVAP canister vent valve in EVAP leak check module by using SUZUKI scan tool.
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)
b. Method without using SUZUKI scan tool:
i. With ignition mode of keyless push start system in "OFF", connect special tool between ECM and ECM connectors. For connecting procedure, refer Step 1) and 2) of "Voltage Check" under Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters
ii. Push engine switch to change the ignition mode to "ON".
iii. Use service wire to ground "E01-59" terminal of ECM connector (valve: close).
6. Blow compressed air (1) (2.0 kPa (0.02 kgf/cm2, 0.29 psi, 0.02 bar)) into air port (2). Air should not come out filler port (3) and purge port (4).
If check results are not as described above, check wire harness and connections.
If check results of wire harness and connections are OK, replace EVAP leak check module and EVAP canister as assembly.
EVAP Leak Detection Pump Inspection
Operate EVAP leak detection pump in EVAP leak check module as follows. If you have SUZUKI scan tool, perform step 1). If not, perform step 2).
1. Method using SUZUKI scan tool:
a. Disconnect suction pipe from EVAP leak check module, and disconnect filler pipe and purge pipe from EVAP canister.
b. Plug purge port (1) with rubber plug securely.
c. Connect vacuum hose (2) and spherical plastic bag (3) with approximately 12.5 cm (4.92 in.) diameter (volume: 1.0 liter (2.11/1.76 US/Imp pt)) to filler port (4) using a rubber band (5) as shown in figure.
d. With ignition mode of keyless push start system in "OFF", connect special tool between ECM and ECM connectors. For connecting procedure, refer to Step 1) and 2) of "Voltage Check" under Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters
e. Connect SUZUKI scan tool to DLC (1).
f. Push engine switch to change the ignition mode to "ON", and select "Active Test" mode on SUZUKI scan tool.
g. Operate EVAP leak detection pump in EVAP leak check module by using SUZUKI scan tool.
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)
h. Use service wire to ground "E01-59" terminal of ECM connector (EVAP canister vent valve: close).
i. Check that air in plastic bag is fully evacuated by EVAP leak detection pump within approximately 2 minutes.
If check results are not as described above, check wire harness and connections.
If check results of wire harness and connections are OK, replace EVAP leak check module and EVAP canister as assembly.
2. Method without using SUZUKI scan tool:
CAUTION: Make sure that connection is made between correct terminals. Wrong connection can cause damage to EVAP canister vent valve and EVAP leak detection pump in EVAP leak check module.
a. Remove EVAP leak check module and EVAP canister as assembly.
b. Connect a spherical plastic bag (1) with approximately 12.5 cm (4.92 in.) diameter (volume: 1.0 liter (2.11/1.76 US/Imp pt)) to filler port (2) using a rubber band (3) as shown in figure.
c. Securely plug purge port (4) with rubber plug.
d. Operate EVAP canister vent valve and EVAP leak detection pump by connecting 12 V battery to EVAP leak check module terminals as shown in figure.
e. Check that air in plastic bag is fully evacuated by EVAP leak detection pump within approximately 2 minutes.
If check result is not as described above, replace EVAP leak check module and EVAP canister as assembly.
EVAP Leak Check Pressure Sensor (Combine with BARO Sensor) On-Vehicle Inspection
CAUTION: Make sure that connection is made between correct terminals. Wrong connection can cause damage to EVAP leak check pressure sensor in EVAP leak check module.
Initial (barometric) pressure check
1. With ignition mode of keyless push start system in "OFF", connect special tool between ECM and ECM connectors. For connecting procedure, refer to Step 1) and 2) of "Voltage Check" under Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters
2. Push engine switch to change the ignition mode to "ON".
3. Check EVAP leak check pressure sensor output voltage (barometric pressure signal voltage) between "E01-8" terminal and ground, according to the following table.
EVAP leak check pressure sensor output voltage for initial (barometric) pressure at 20 - 30 °C (68 - 86 °F))
If sensor output voltage is out of specification, check wire harness and connections.
If check results of the wire harness and connections are OK, replace EVAP leak check module and EVAP canister as assembly.
If output voltage is within specified value, perform "Reference vacuum pressure (reference orifice vacuum) check".
Reference vacuum pressure (reference orifice vacuum) check
1. With the conditions the same as during the "Initial (barometric) check", operate EVAP leak detection pump. If you have SUZUKI scan tool, perform the step a). If not, perform the step b).
a. Method using SUZUKI scan tool:
i. With ignition mode of keyless push start system in "OFF", connect SUZUKI scan tool to DLC (1).
ii. Push engine switch to change the ignition mode to "ON", and select "Active Test" mode on SUZUKI scan tool.
iii. Use SUZUKI scan too to close EVAP leak detection pump in EVAP leak check module.
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)
iv. Check that pressure sensor output voltage (reference orifice vacuum) becomes lower than pressure sensor output voltage of "Initial (barometric) pressure check" by approximately 0.1 V.
If sensor output voltage is out of specification, replace EVAP leak check module and EVAP canister as assembly.
b. Method without using SUZUKI scan tool:
i. With ignition mode of keyless push start system in "OFF", disconnect ECM connectors from ECM and connect special tool to the connectors disconnected. For connecting procedure, refer to Step 1) and 2) of "Voltage Check" under Inspection of ECM and Its Circuits. Pinout Values and Diagnostic Parameters
ii. Insert 3 new 1.5 V batteries (1) in series and connect positive terminal to "E01-40" terminal of ECM connector and negative terminal to "E01-38" terminal of ECM connector.
iii. Operate EVAP leak detection pump by connecting both positive terminal of the 12 V battery to "E01-58" terminal and negative terminal to vehicle body.
iv. Check EVAP leak check pressure sensor output voltage (barometric pressure signal voltage) between "E01-8" terminal and negative terminal until it becomes lower than pressure sensor output voltage of "Initial (barometric) pressure check" by approximately 0.1 V.
If sensor output voltage is out of specification, replace EVAP leak check module and EVAP canister as assembly.
EVAP Leak Check Module Visual Check
Check EVAP leak check module (1) for damage and deterioration.
If any faulty condition is found, replace EVAP leak check module and EVAP canister as assembly.
