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Home >> Suzuki >> 2005 >> Swift + >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.6L (L91) - DTC P0201 To DTC P0455 >> Diagnosis >> DTC P0351 or P0352 >> Test Description
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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step determines if there is a fault within an ignition coil circuit.
  2. 4:  This step tests the ignition coil. If the frequency is within the specified range, there is a condition with the ignition control circuit or the ECM.
P0351-P0352 Ignition Coil Control Circuit

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check - Engine Controls ? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 
  1. Start the engine.
  2. Observe the DTC Info. with a scan tool.
Did DTC P0351 or P0352 fail this ignition?		 - Go to Step 4  Go to Step 3 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 - Go to Step 4  Go to Intermittent Conditions
4 
  1. Turn OFF the engine.
  2. Remove the fuel pump relay from the underhood fuse block with the J 43244  Relay Puller Pliers.
  3. Disconnect the ignition coil harness connector.
  4. Connect a DMM between the appropriate ignition control circuit and a good ground.
  5. Set the DMM to the AC 4 Hertz scale. Refer to Measuring Frequency in Wiring Systems.
  6. Observe the DMM while cranking the engine.
Is the frequency more than the specified value?		 3 Hz Go to Step 6  Go to Step 5 
5 Test the appropriate ignition control circuit of the ignition coil for the following conditions:
  • An open
  • A short to ground
  • A short to voltage
  • High resistance

Refer to Testing for Short to Ground in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
6 Test for an intermittent and for a poor connection at the ignition coil. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
7 Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
8 Replace the ignition coil. Refer to Ignition Coil(s) Replacement .
Did you complete the replacement?		 - Go to Step 10   
9 Replace the ECM. Refer to Engine Control Module (ECM) Replacement .
Did you complete the replacement?		 - Go to Step 10   
10
  1. Reassemble the vehicle as necessary.
  2. Clear the DTCs with a scan tool.
  3. Turn OFF the ignition for 30 seconds.
  4. Start the engine.
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 11 
11 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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