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DTC Troubleshooting

DIAGNOSIS PROCEDURE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2 
  1. Check for voltage at terminal "C46-27" of ECM connector connected, under the following condition.

Engine starter signal specification 
While engine cranking: 6 - 14 V 
Is voltage as specified? 		 Poor "C46-27" connection or intermittent trouble.
Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION .
If wire and connections are OK, substitute a known-good ECM and recheck.		 Go to Step 3.
3  Starter signal circuit check 
  1. Turn OFF ignition switch.
  2. Disconnect connectors from ECM.
  3. Measure resistance between "C46-27" terminal of disconnected ECM connector and "C45-6" terminal of disconnected ECM connector.

Is resistance less than 100 ohm? 		 Substitute a known-good ECM and recheck. Open or high resistance wire in "BLK/YEL" circuit.
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