Yamaha F150B Service Manual

Also see for F150B: Owner's manual Service manual Owner's manual

4-17TRBLSHTG TroubleshootingTroubleshooting the PTT unit— : Not applicableSymptom 1: PTT unit does not operate.Symptom 2 Cause 1 Cause 2 Checking step Refer topagePTT motor does notoperateBlown fuse — Check the fuse. 5-2A-7Loose connection of the battery terminal — Check the battery terminal. 3-17PTT switch malfunction — Check the PTT switch. 5-49PTT relay malfunction — Check the PTT relay. 5-48Short, open, or loose connection of the wir-ing harness—Check the PTT switch input voltage. 5-49A-7Check the PTT relay input voltage. 5-48A-7Check for wiring continuity between the PTTswitch and PTT relay.5-49A-7Check for wiring continuity between the PTTswitch and fuse.5-49A-7PTT motor malfunction — Check the PTT motor. 9-42Short, open, or loose connection of the PTTmotor lead — Check for wiring continuity between the PTTmotor and PTT relay terminal.A-7PTT fluid pressure doesnot increaseManual valve opened Manual valve malfunction Check the manual valve. 9-45Insufficient PTT fluid — Add sufficient fluid. 9-36PTT fluid leakage — Check the hydraulic pressure. 9-34Clogged filter — Disassemble and check the PTT unit. 2-299-32Clogged fluid passage —Gear pump malfunction — Disassemble and check the gear pumpassembly.9-45