Tacoma Toyota Evap Wiring Diagram

L1 Canister Pump Module r ECM

r ECM

2012 Toyota Tacoma Wiring Diagram
Y A121772E01

NOTICE:

The intelligent tester is required to conduct the following diagnostic troubleshooting procedure.

HINT:

• Using intelligent tester monitor results enables the EVAP (Evaporative Emission) system to be confirmed.

• Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

CONFIRM DTC

(a) Turn the ignition switch to OFF and wait for 10 seconds.

(b) Turn the ignition switch to ON.

(c) Turn the ignition switch to OFF and wait for 10 seconds.

(d) Connect an intelligent tester to the DLC3.

(e) Turn the ignition switch to ON and turn the tester ON.

(f) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

(g) Confirm DTCs and freeze frame data.

If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below. NOTICE:

If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the leak criterion (P043E, P043F, P2401, P2402 and P2419) will all be stored.

DTCs

Malfunctioning Areas^"^^-^^^

P043E P043F

P0441

P0450

P0451

P0452

P0453

P0455

P0456

P2401 P2402

P2419

P2420

Reference orifice clogged

Reference orifice high-flow

Purge VSV stuck open

Purge VSV stuck closed

Canister pressure sensor stuck

Canister pressure sensor noise

Canister pressure sensor low output

Canister pressure sensor high output

Gross leak

Small leak

Leak detection pump stuck OFF

Leak detection pump stuck ON

Vent valve stuck closed

Vent valve stuck open (vent)

PERFORM EVAP SYSTEM CHECK (AUTO OPERATION)

NOTICE:

• The EVAP SYSTEM CHECK (AUTO OPERATION) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes.

• Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed and making the leak check of the fuel tank unavailable.

• When the temperature of the fuel is 35°°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).

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(b) On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

(c) After the EVAP SYSTEM CHECK is completed, check for pending DTCs by selecting the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

HINT:

If no pending DTC is displayed, perform the Monitor Confirmation (see "Diagnostic Help" menu). After this confirmation, check for pending DTCs. If no DTC is displayed, the EVAP system is normal.

PERFORM EVAP SYSTEM CHECK (MANUAL OPERATION)

NOTICE:

• In the EVAP SYSTEM CHECK (MANUAL OPERATION), the series of 5 EVAP SYSTEM CHECK steps is performed manually by the intelligent tester.

• Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed and making the leak check of the fuel tank unavailable.

• When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).

(b) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / MANUAL OPERATION.

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PERFORM EVAP SYSTEM CHECK (STEP 1/5)

Purge VSV

Vent Valve

Leak Detection Pump

EVAP Pressure Positive

Canister Pressure Sensor Noise

ON: Open

OFF: Closed ON: Closed

OFF: Vent

Negative

0.02 Inch Leak Criterion

Steps

Time (Second) (Reference)

Tacoma Evap System

Ai06736E04

(a) Check the EVAP pressure in step 1/5.

Result

DTCs*

Test Results

Suspected Trouble Areas

Proceed To

-

Virtually no variation in EVAP pressure

Not yet determined

A

P0451

EVAP pressure fluctuates by +0.3 kPa (2.25 mmHg) or more

Canister pressure sensor noise

B

: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.

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Responses

  • aki-petter
    How to fix 2000 tacoma evap how it works?
    2 months ago

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