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Ignition coil pack wire volts?

Tiny
JEGGY
  • MEMBER
  • 2008 NISSAN ALTIMA
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 127,500 MILES
#1 and #2 coil packs melted some and positive wire for 3 pin connector was smoking when tried to start. With key off all positive pins at connectors had 12.50 volts then I turned key to on position and all 4-coil pack positive wires read.02 volts. Originally it had code P0301. I really don't have any knowledge of electronics except basic positive and negative.
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Wednesday, October 30th, 2024 AT 3:14 AM

4 Replies

Tiny
BORIS K
  • MECHANIC
  • 799 POSTS
Hello,

If the coil packs for cylinders 1+2 have been damaged, I would suggest replacing these.
Next check the condition of the connectors and wiring to them.
On each coil connector pin 1 is the trigger wire, pin 2 is a black wire to ground, pin 3 is a red/white wire 12V supply. 12V is supplied from the ECM relay in the IPDM, see wiring information below.
If wiring looks damaged, suggest fitting a connector repair kit, trim back the damaged wiring.
Connector kits are available online.

See good video:
https://youtu.be/Ozo6YkSRdZM?si=yFW-o_CXD9TOKmB9

How to test wires:
https://www.2carpros.com/articles/how-to-check-wiring

Cheers, Boris
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Wednesday, October 30th, 2024 AT 10:36 AM
Tiny
JEGGY
  • MEMBER
  • 3 POSTS
Thank you, sir, I will get on this as soon as I can in about 2 hours. I'll let you know how it's going.
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Wednesday, October 30th, 2024 AT 12:13 PM
Tiny
JEGGY
  • MEMBER
  • 3 POSTS
I've ordered (4) new Hitachi ignition coil packs. Also (4) new wire connector pigtails.
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Wednesday, October 30th, 2024 AT 5:00 PM
Tiny
BORIS K
  • MECHANIC
  • 799 POSTS
Hello,

Thank you for the feedback.
Please let us know if you require any other information.

Cheers, Boris
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Thursday, October 31st, 2024 AT 9:30 AM

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