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EVAP System Troubleshooting

Special Tools Required

Combination gauge kit 20/−100 kPa
 07YAJ-0010610

Tube joint adapter
 07410-5790503
RHD model
  1. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) and connect a vacuum pump/gauge (C) to the hose.
  1. Start the engine, and let it idle.
    NOTE: Engine coolant temperature must be below 60 °C (140 °F).
Is there vacuum?
YES -
Inspect vacuum hose routing. If OK, replace the EVAP canister purge valve.■
NO -
Go to Step 3 .
  1. Hold the engine speed at 3,000 rpm (min −1 ) without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then hold the engine speed to 3,000 rpm (min −1 ).
Is there vacuum?
YES -
Go to Step 4 .
NO -
Inspect vacuum hose routing. If OK, replace the EVAP canister purge valve.
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect the vacuum hose to the EVAP canister purge valve.
  1. Remove the fuel fill cap.

  1. Disconnect the drain tube joint (A) from the EVAP canister and connect the combination gauge kit and tube joint adapter to EVAP canister (B).
  1. Start the engine and raise speed to 3,000 rpm (min −1 ).
Does vacuum appear on gauge within 1 minute?
YES -
See EVAP two way valve test to complete. Evaporative emission controls are OK.■
NO -

LHD model
  1. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) and connect a vacuum pump/gauge (C) to the hose.
  1. Start the engine, and let it idle.
    NOTE: Engine coolant temperature must be below 60 °C (140 °F).
Is there vacuum?
YES -
Inspect vacuum hose routing. If OK, replace the EVAP canister purge valve.■
NO -
Go to Step 3 .
  1. Hold the engine speed at 3,000 rpm (min −1 ) without load (A/T in N or P, M/T in neutral) until the radiator fan comes on, then hold the engine speed to 3,000 rpm (min −1 ).
Is there vacuum?
YES -
Go to Step 4 .
NO -
Inspect vacuum hose routing. If OK, replace the EVAP canister purge valve.
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect the vacuum hose to the EVAP canister purge valve.
  1. Remove the fuel fill cap.
  1. Lift the vehicle, and support it with jackstands.

  1. Disconnect drain tube (A) from the EVAP canister and connect the combination gauge kit and tube joint adapter to EVAP canister (B).
  1. Lower the vehicle.
  1. Start the engine and raise speed to 3,000 rpm (min −1 ).
Does vacuum appear on gauge within 1 minute?
YES -
See EVAP two way valve test to complete. Evaporative emission controls are OK.■
NO -