Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT CANISTER (CHARCOAL CANISTER ASSEMBLY)

(a) Slide the clip and disconnect the purge line hose from the canister (charcoal canister assembly).

(b) Visually check the canister (charcoal canister assembly).

(1) Visually check the canister (charcoal canister assembly) for cracks or damage.

If cracks or damage is found, replace the canister (charcoal canister assembly).

(c) Check canister (charcoal canister assembly) operation.

(1) With the purge line port closed, blow 0.5 kPa (0.005 kgf/cm2, 0.1 psi) of air into the vent line port, and check that air flows from the air line port. If the result is not as specified, replace the canister (charcoal canister assembly).

*a Vent Line Port *b Air Line Port *c Purge Line Port *d Air

(2) With the vent line port closed, blow 0.5 kPa (0.005 kgf/cm2, 0.1 psi) of air into the air line port, and check that air flows from the purge line port. If the result is not as specified, replace the canister (charcoal canister assembly).

*a Vent Line Port *b Air Line Port *c Purge Line Port *d Air

(d) Check for air leaks.

(1) Connect a pressure gauge to the vent line port.

*a Pressure Gauge *b Vent Line Port *c Air Line Port *d Purge Line Port *e Charcoal Canister Leak Detection Pump Sub-assembly Connector

(2) With the purge line port, air line port and charcoal canister leak detection pump sub-assembly connector closed, apply 20 kPa (150 mmHg, 5.91 in. Hg) of pressurized air into the vent line port, then confirm that pressure is maintained for 1 minute.

If the result is not as specified, replace the canister (charcoal canister assembly).

(e) Check the charcoal canister leak detection pump sub-assembly.

(1) Connect a positive (+) battery lead to terminal 5 and a negative (-) battery lead to terminal 1.

(2) Check that a clicking sound is heard from the charcoal canister leak detection pump sub-assembly.

If the result is not as specified, replace the charcoal canister leak detection pump sub-assembly.

(f) Connect the purge line hose to the canister (charcoal canister assembly) and slide the clip to secure it.