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Sequoia & Tundra 4.7L

NOTE: Cranking Hold Function Circuit maybe referred to as starter signal circuit.

For cranking hold function circuit inspection and wiring diagram, see Fig 1-Fig 12 . For circuit identification, see ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. To check for intermittent problems, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. Before replacing ECM, check ECM connectors and ground circuits. See ENGINE CONTROL MODULE POWER & GROUND CIRCUITS under COMPUTERIZED ENGINE CONTROLS.

Fig 1: Cranking Hold Function Circuit Description & Diagram (Sequoia & Tundra 4.7L)

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Fig 2: Cranking Hold Function Wiring Diagram (Sequoia)

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Fig 3: Cranking Hold Function Circuit Wiring Diagram (Tundra 4.7L)

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Fig 4: Cranking Hold Function Circuit Inspection Using Hand-Held Tester - Step 1 (Sequoia & Tundra 4.7L)

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Fig 5: Cranking Hold Function Circuit Inspection Using Hand-Held Tester - Steps 2-3 (Sequoia & Tundra 4.7L)

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Fig 6: Cranking Hold Function Circuit Inspection Using Hand-Held Tester - Steps 4-6 (Sequoia & Tundra 4.7L)

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Fig 7: Cranking Hold Function Circuit Inspection Using Hand-Held Tester - Steps 7-9 (Sequoia & Tundra 4.7L)

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Fig 8: Cranking Hold Function Circuit Inspection Using OBD II Scan Tool - Steps 1-2 (Sequoia & Tundra 4.7L)

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Fig 9: Cranking Hold Function Circuit Inspection Using OBD II Scan Tool - Steps 3-4 (Sequoia & Tundra 4.7L)

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Fig 10: Cranking Hold Function Circuit Inspection Using OBD II Scan Tool - Steps 5-7 (Sequoia & Tundra 4.7L)

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Fig 11: Cranking Hold Function Circuit Inspection Using OBD II Scan Tool - Steps 8-9 (Sequoia & Tundra 4.7L)

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Fig 12: Locating Data Link Connector No. 3 (Sequoia & Tundra 4.7L)

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