EVAP Leak Check Module Inspection
EVAP Leak Check Module Inspection
Check each component as follows.
NOTE:
- The connectors of the ECM are watertight. If tester probes are directly connected to any of the connectors when checking the ECM and its circuits, the watertight performance of the connector will be affected, possibly resulting in corrosion of connector terminals and damage to electrical circuits.
Always use the special tool when checking the ECM and its circuits. Connect tester probes only to the special tool's connectors.
- If you connect a voltmeter or ohmmeter directly to ECM terminals by removing ECM connectors, you can damage the control module. Never connect a voltmeter or an ohmmeter directly to any terminal of ECM by disconnecting ECM connectors.
NOTE:
For operation of EVAP leak check module, refer to Description and Operation EVAP Leak Check System Description.
EVAP Canister Vent Valve On-Vehicle Inspection
WARNING:
If vacuum is applied using your mouth, there is a risk of inhaling harmful fuel vapor.
Be sure to use a hand vacuum pump to apply vacuum.
NOTE:
If too high a vacuum is applied, the EVAP canister purge valve may be damaged.
Do not exceed a vacuum of -67 kPa (-0.68 kgf/cm2, -9.72 psi, -0.67 bar).
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 Pinout Values and Diagnostic Parameters Inspection of ECM and Its Circuits.
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 to 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. Service and Repair
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 ignition mode of keyless push start system to "ON".
iii) Select "Active Test" mode on SUZUKI scan tool.
iv) 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 Pinout Values and Diagnostic Parameters Inspection of ECM and Its Circuits.
ii) Push engine switch to change ignition mode of keyless push start system 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 from 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. Service and Repair
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 Pinout Values and Diagnostic Parameters Inspection of ECM and Its Circuits.
e) Connect SUZUKI scan tool to DLC (1).
f) Push engine switch to change ignition mode of keyless push start system to "ON".
g) Select "Active Test" mode on SUZUKI scan tool.
h) Operate EVAP leak detection pump in EVAP leak check module by using SUZUKI scan tool.
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)
i) Use service wire to ground "E01-59" terminal of ECM connector (EVAP canister vent valve: close).
j) 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:
NOTE:
If the battery is connected to the wrong terminals of the EVAP leak check module, the EVAP canister vent valve and EVAP leak detection pump in the EVAP leak check module may be damaged.
Be sure to connect the battery to the correct terminals of the EVAP leak check module.
a) Remove EVAP leak check module and EVAP canister as assembly. Service and Repair
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
NOTE:
If the battery is connected to the wrong terminals of the EVAP leak check module, the EVAP leak check pressure sensor in the EVAP leak check module may be damaged.
Be sure to connect the battery to the correct terminals of the 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 Pinout Values and Diagnostic Parameters Inspection of ECM and Its Circuits.
2) Push engine switch to change ignition mode of keyless push start system 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
4) 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 ignition mode of keyless push start system to "ON".
iii) Select "Active Test" mode on SUZUKI scan tool.
iv) Use SUZUKI scan too to close EVAP leak detection pump in EVAP leak check module.
Special Tool
(A): SUZUKI scan tool (SUZUKI-SDT)
v) 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 Pinout Values and Diagnostic Parameters Inspection of ECM and Its Circuits.
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.
