Dtc summary
Hint:
The vent valve is built into the canister pump module.
Description
The description can be found in the evap (evaporative emission) system (see page es-335).
Inspection procedure
Refer to the evap system (see page es-340).
Monitor description
5 Hours* after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the evap system. The ecm monitors for leaks and actuator malfunctions based on the evap pressure.
Hint:
*: If the engine coolant temperature is not below 35°c (95°f) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°c (95°f) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 Hours later.
*: If only a small amount of fuel is in the fuel tank, it takes longer for the evap pressure to stabilize.
In operation b, the leak detection pump creates negative pressure (a vacuum) through the reference orifice. The evap system pressure is then measured by the ecm, using the canister pressure sensor, to determine the reference pressure. If the pressure exceeds -1.057 Kpa-g (-7.93 Mmhg-g) 4 seconds after the leak detection pump is turned on, the ecm interprets this as the vent valve being stuck closed.
The ecm illuminates the mil and sets the dtc (2 trip detection logic).
In operation c, the vent valve turns on (closes) and the evap system pressure is then measured by the ecm, using the canister pressure sensor, to conduct an evap leak check. If the pressure does not increase when the vent valve is open, the ecm interprets this as the vent valve being stuck open. The ecm illuminates the mil and sets the dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
"Saturated" indicates that the evap pressure change is less than 0.286 Kpa-g (2.14 Mmhg-g) in 60 seconds.
Monitor result
Refer to checking monitor status (see page es-17).
How to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the key reminder
warning system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 to 14 v
Hint:
If the voltage is below 11 v, recharge or replace the battery
before proceedi ...
Diagnosis system
Description
Air conditioning system data and the diagnostic
trouble codes (dtcs) can be read through the
data link connector 3 (dlc3) of the vehicle. When
the system seems to be malfunctioning, use the
intelligent tester to check for malfunctions and
perform troubleshooting.
...
Driver side satellite sensor bus initialization incomplete
Description
The side airbag sensor lh consists of part including the diagnostic circuit
and the lateral deceleration
sensor.
When the center airbag sensor receives signals from the lateral deceleration
sensor, it determines
whether or not the srs should be activated.
Dtc b1643/81 is ...