DTC 0807
SYSTEM DESCRIPTION
This system controls the vacuum signal applied to the EVAP canister purge control valve. When the ECM detects any of the following conditions, current does not flow through the EVAP canister purge control solenoid valve. The solenoid valve cuts the vacuum signal so that the EVAP canister purge control valve remains closed.
- Ignition switch "ON"
- Closed throttle position
- Low engine coolant temperature
- During deceleration
- Engine stopped
- Low vehicle speed (M/T models)
COMPONENT DESCRIPTION
EVAP Canister Purge Control Solenoid Valve
The EVAP canister purge control solenoid valve responds to signals from the ECM. When the ECM sends an OFF signal, the vacuum signal (from the intake manifold to the EVAP canister purge control valve) is cut.
When the ECM sends an ON (ground) signal, the vacuum signal passes through the EVAP canister purge control solenoid valve. The signal then opens the
EVAP Canister Purge Control Valve
When the vacuum signal is cut by EVAP canister purge control solenoid valve, EVAP canister purge control valve closes.
EVAPORATIVE EMISSION SYSTEM DIAGRAM
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (43) (ECCS Ground).
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Perform "Procedure for malfunction A" first. If the DTC cannot be confirmed, perform "Procedure for malfunction B".
Procedure for Malfunction A
With Consult
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT at least 5 seconds.
OR
With GST
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Select "MODE 3" with GST.
OR
No Tools
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
(3) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Procedure for malfunction B
With Consult
(1) Jack up drive wheels.
(2) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
(3) Start engine and warm it up sufficiently.
(4) Check that tank fuel temperature is above 0°C (32°F).
(5) Turn ignition switch "OFF" and wait at least 5 seconds.
(6) Start engine and let it idle for at least 70 seconds.
(7) Maintain the following conditions for at least 10 seconds.
Headlamp switch: ON
Rear window defogger switch: ON
A/C: ON
Gear position:
"2" or "D" range (A/T)
"4th" gear (M/T)
Vehicle speed: 50 - 80 km/h (31 - 50 MPH)
Engine speed: 2,000 - 2,500 rpm
Coolant temperature: Less than 100°C (212°F)
OR
With GST
(1) Jack up drive wheels.
(2) Turn ignition switch "ON" and select "MODE 1" with GST.
(3) Start engine and warm it up sufficiently.
(4) Check that voltage between ECM terminal (63) and ground is less than 4.2V.
(5) Turn ignition switch "OFF" and wait at least 5 seconds.
(6) Start engine and let it idle for at least 70 seconds.
(7) Maintain the following conditions for at least 10 seconds.
Headlamp switch: ON
Rear window defogger switch: ON
A/C: ON
Gear position:
"2" or "D" range (A/T)
"4th" gear (M/T)
Vehicle speed: 50 - 80 km/h (31 - 50 MPH)
Engine speed: 2,000 - 2,500 rpm
Coolant temperature: Less than 100°C (212°F)
(8) Select "MODE 3" with GST
OR
No Tools
(1) Jack up drive wheels.
(2) Turn ignition switch "ON".
(3) Start engine and warm it up sufficiently.
(4) Check that voltage between ECM terminal (63) and ground is less than 4.2V.
(5) Turn ignition switch "OFF" and wait at least 5 seconds.
(6) Start engine and let it idle for at least 70 seconds.
(7) Maintain the following conditions for at least 10 seconds.
Gear position:
"2" or "D" range (A/T)
"4th" gear (M/T)
Vehicle speed: 50 - 80 km/h (31 - 50 MPH)
Engine speed: 2,000 - 2,500 rpm
Voltage between ECM terminal (51) and ground: More than 0.8V
(8) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON".
(9) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
DIAGNOSTIC PROCEDURES
Procedure for Malfunction A
Procedure for Malfunction B
COMPONENT INSPECTION
EVAP Canister Purge Control Solenoid Valve
With Consult
1. Jack up driving wheels (M/T models only).
2. Turn ignition switch "ON".
3. Select "PURG CONT S/V" of "ACTIVE TEST" mode with CONSULT.
4. Start engine and warm it up sufficiently.
5. Disconnect vacuum hose at EVAP canister purge control valve.
6. Touch "ON" and "OFF" and check for vacuum passing through the hose.
Condition / Vacuum
2,000 rpm (A/T models) / Not exist
2,000 rpm with 1 gear position (M/T models) / Exist
OR
Without Consult
Check air passage continuity.
If NG, replace solenoid valve.
EVAP Canister Purge Control Valve
Check EVAP canister purge control valve as follows.
1. Plug the port (B).
2. Apply pressure [80.0 kPa (600 mmHg, 23.62 inHg)] to port (B). Then keep it for 15 seconds, and check there is no leakage.
3. Repeat step 2 for port (C).