EG–588 ENGINE – 2JZ–GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE 1 Check IAC valve. P Disconnect IAC valve connector. C Measure resistance between terminals shown below. OK Terminal Resistance 5 (B1) – 4 (S1) 10 Ω – 30 Ω 5 (B1) – 6 (S3) 10 Ω – 30 Ω 2 (B2) – 1 (S2) 10 Ω – 30 Ω 2 (B2) – 3 (S4) 10 Ω – 30 Ω P Remove IAC Valve. C (1) Connect the battery positive lead to terminals 5 (B1) and 2 (B2), and the negative lead to terminals 4(S1)—1(S2)—6(S3)—3(S4) in that order. (2) Connect the battery positive lead to terminals 5 (B1) and 2 (B2) and the negative lead to terminals 3(S4)—6(S3)—1(S2)—4(S1) in that order. OK (1) The valve moves in the closing direction (2) The valve moves in the opening direction. 3 2 1 (S4)(B2)(S2) 6 5 4 (S3)(B1)(S1) Closed 5 (B1) 6 (S3) 4 (S1) ⊕ ⊖ 3 (S4) Battery 1 (S2) 2 (B2) Open 5 (B1) 6 (S3) 4 (S1) ⊕ ⊖ 3 (S4) Battery 1 (S2) 2 (B2) FI1694 P11399 P11388 OK NG Replace IAC valve. 2 Check for open and short in harness and connector between EFI main relay and IAC valve, IAC valve and engine control module (See page IN–30). OK NG Repair or replace harness or connector. Proceed to next circuit inspection shown on matrix chart (See page EG–514).