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Test No. 39: Transmission Pattern Select Switch Circuit

NOTE: If LEXUS scan tool is available, start test from step  1. If this scan tool is not available, start test from step  2.
  1. Using scan tool, check pattern select switch using DATA LIST. If pattern select switch is faulty, go to next step. If pattern select switch is okay, go to step  3.
  2. Check pattern select switch. See TRANSMISSION PATTERN SELECT SWITCH  under COMPONENT TESTS. Replace pattern select switch as necessary. Retest system operation. If pattern select switch is okay, go to next step.
  3. Check circuits for faults between pattern select switch and body control ECU No. 1. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, perform appropriate pin voltage test BODY CONTROL ECU PIN VOLTAGE TESTS  under COMPONENT TESTS.
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