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Cranks, but no start 08 Tacoma 2.7L 5 lug base model

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Hodges87, Aug 17, 2021.

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  1. Aug 20, 2021 at 12:11 PM
    #21
    tirediron

    #21
    tirediron Well-Known Member

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    That's what the schematic seems to show as well.
     
    tirediron, Aug 20, 2021
    #21
  2. Aug 20, 2021 at 1:50 PM
    #22
    Jimmyh

    #22
    Jimmyh Well-Known Member

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    I agree everything I have says that brown wire is a ground. Should be easy to check with a quick continuity check with the truck off check that terminal to a good chassis ground. Should read 0 ohms resistance.

    All of the Brown Wires go to ground and are used for shielded connections where the white with a black stripe are regular signal / power return ground wires.
     
    Last edited: Aug 20, 2021
    Jimmyh, Aug 20, 2021
    #22
  3. Aug 20, 2021 at 2:02 PM
    #23
    Hodges87

    #23
    Hodges87 [OP] Active Member

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    It does read 0 ohms resistance. Do you know what terminals I need to test for 12v ign and 12v consistent power to ecm?
     
    Hodges87, Aug 20, 2021
    #23
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  4. Aug 20, 2021 at 2:20 PM
    #24
    Dm93

    #24
    Dm93 Test Don't Guess

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    Connector E8 pin1 black, pin 3 blue, pin 7 light green pin 9 orange
     
    Dm93, Aug 20, 2021
    #24
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  5. Aug 20, 2021 at 2:23 PM
    #25
    Dm93

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    Dm93 Test Don't Guess

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    pin 22 and 29 (White/Black) on E8 should be grounds
     
    Dm93, Aug 20, 2021
    #25
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  6. Aug 20, 2021 at 2:23 PM
    #26
    Jimmyh

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    Jimmyh Well-Known Member

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    12v Ignition Power - Orange Wire from the IGN Fuse, Terminal # 9.

    12v Consistent - Blue Wire is Battery from the EFI Fuse, Terminal # 3.
     
    Jimmyh, Aug 20, 2021
    #26
  7. Aug 20, 2021 at 2:38 PM
    #27
    Hodges87

    #27
    Hodges87 [OP] Active Member

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    Connector E8
    Pin 1 (black) no power
    Pin 3 12v
    Pin 7 12v
    Pin 9 12v with key on
     
    Hodges87, Aug 20, 2021
    #27
  8. Aug 20, 2021 at 2:42 PM
    #28
    Dm93

    #28
    Dm93 Test Don't Guess

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    see if you have power on the EFI no2 fuse, if not check the EFI Relay.
     
    Dm93, Aug 20, 2021
    #28
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  9. Aug 20, 2021 at 2:54 PM
    #29
    Jimmyh

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    Jimmyh Well-Known Member

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    Wouldn't pin # 1 Black come from the EFI Fuse through the EFI Relay then to Pin # 1?

    The EFI Relay supplies power to the EFI No2 Fuse...

    EFI Fuse >> EFI Relay Contact >> EFI No 2 Fuse, COPN Relay Contact and ECU Pin # 1 Via the black Wire.
     
    Jimmyh, Aug 20, 2021
    #29
  10. Aug 20, 2021 at 2:57 PM
    #30
    Hodges87

    #30
    Hodges87 [OP] Active Member

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    EFI # 2 fuse 12v, the red circled areas have 12v on relay

    Relay.jpg
     
    Hodges87, Aug 20, 2021
    #30
  11. Aug 20, 2021 at 3:02 PM
    #31
    Dm93

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    Dm93 Test Don't Guess

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    The other side pin should be a ground and the bottom pin feeds the black wire.
     
    Dm93, Aug 20, 2021
    #31
  12. Aug 20, 2021 at 3:03 PM
    #32
    Dm93

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    Dm93 Test Don't Guess

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    Maybe i misread the diagram, I've been glancing through it when I've had free time at work.
     
    Dm93, Aug 20, 2021
    #32
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  13. Aug 20, 2021 at 3:25 PM
    #33
    Hodges87

    #33
    Hodges87 [OP] Active Member

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    I verified the relay does supply power to the bottom pin in the picture, with the key on
     
    Hodges87, Aug 20, 2021
    #33
  14. Aug 20, 2021 at 3:29 PM
    #34
    Hodges87

    #34
    Hodges87 [OP] Active Member

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    With the connector plugged into the ECM the E8 pin1 black has 12v with key on
     
    Hodges87, Aug 20, 2021
    #34
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  15. Aug 20, 2021 at 4:25 PM
    #35
    Jimmyh

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    Jimmyh Well-Known Member

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    Then all of your power is correct on the ECM.
     
    Jimmyh, Aug 20, 2021
    #35
  16. Aug 20, 2021 at 4:28 PM
    #36
    Dm93

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    Dm93 Test Don't Guess

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    And you verified grounds on E4 pins 6 & 7 (White/Black) and E8 Pins 22 & 29 (White/Black)?
     
    Dm93, Aug 20, 2021
    #36
  17. Aug 20, 2021 at 4:30 PM
    #37
    Dm93

    #37
    Dm93 Test Don't Guess

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    Also E5 Pins 3,4, & 7 (White/Black) should be grounds.
     
    Dm93, Aug 20, 2021
    #37
  18. Aug 20, 2021 at 5:00 PM
    #38
    tirediron

    #38
    tirediron Well-Known Member

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    Ensure you verify grounds with an incandescent test light, and NOT simply a DVOM.
     
    tirediron, Aug 20, 2021
    #38
    Hodges87[OP] and Dm93 like this.
  19. Aug 20, 2021 at 5:07 PM
    #39
    Dm93

    #39
    Dm93 Test Don't Guess

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    For sure and/or see the link in my sig about using a DVOM.
     
    Dm93, Aug 20, 2021
    #39
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  20. Aug 20, 2021 at 6:46 PM
    #40
    Hodges87

    #40
    Hodges87 [OP] Active Member

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    All grounds tested good. There was not a E8 pin 29. I'm using a Snap-on led test light that turns green when you find a ground
     
    Hodges87, Aug 20, 2021
    #40
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