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ignition control circuit

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Old Dec 19, 2009 | 06:56 PM
  #1  
rba415's Avatar
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Default ignition control circuit

'95 v6 camaro
3.8 liter

i got my my car scanned for problems bcuz the check engine light came on. the code i got was p1361. was wondering if anybody could help me out with this.
 
Old Dec 19, 2009 | 07:08 PM
  #2  
z28pete's Avatar
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Joined: Aug 2005
Posts: 9,215
From: North East PA
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CIRCUIT DESCRIPTION
The ignition control module (ICM) has independent power and ground circuits. The circuits between the ICM and the powertrain control module (PCM) consists of the following circuits:
  • The ignition control (IC) timing signal
  • The IC timing control
  • The low resolution engine speed signal
  • The medium resolution engine signal
  • The camshaft position signal
  • The low reference
Both the camshaft position (CMP) sensor and crankshaft position (CKP) sensor signals are input directly to the ICM. The ICM sends 3X signals to the PCM, and controls the timing advance during engine cranking. The timing advance changes to PCM control after the following actions occur:
  • The PCM receives the second 3X signal
  • The PCM applies 5 volts to the ignition control (IC) timing signal circuit.
CONDITIONS FOR RUNNING THE DTC
The engine is running.

CONDITIONS FOR SETTING THE DTC
The PCM does not monitor IC pulses while the IC mode spark advance is commanded

Basically the PCM does not see signals from the ICM. Check all wiring & connectors between ICM & PCM. Check for good battery & ground at the ICM. Have ICM tested.
You will need a wiring schematic and a VOM.
 
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