LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2005 >> Relay AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.5L - DTC P0138 - P0443 >> DTC Tests >> DTC P0201-P0206 >> Test Description

Test Description

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

  1. 2:  This step isolates the ignition 1 voltage circuit. An open or short to ground in this circuit sets all fuel injector DTCs.
  2. 4:  This step isolates the circuit between the multi-way connector and the underhood bussed electrical center (UBEC). A short to ground will open the fuel injector fuse.
  3. 7:  This step tests if a ground is constantly being applied to the fuel injector.
  4. 9:  This step isolates the circuit between the multi-way connector and the PCM. An open or short to voltage on the fuel injector control circuit will not allow the test lamp to blink.
  5. 11:  This step inspects for fuel injector harness damage between the multi-way connector and the upper intake manifold. Careful inspection may isolate the condition before the removal of the upper intake manifold.
  6. 16:  This step isolates the circuit between the multi-way connector and the fuel injector. A short to voltage on the fuel injector control circuit will set this DTC.
DTC P0201-P0206

Step Action Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Controls Component Views  or  Powertrain Control Module (PCM) Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 
  1. Turn ON the ignition, with the engine OFF.
  2. Clear the DTCs with a scan tool.
  3. Attempt to start the engine.
  4. Observe the DTC info with a scan tool.
Did DTCs P0201, P0202, P0203, P0204, P0205, and P0206 set?		 Go to Step 3  Go to Step 6 
3 Inspect the fuel injector fuse in the underhood bussed electrical center (UBEC).
Is the fuse open?		 Go to Step 4  Go to Step 5 
4 
  1. Turn OFF the ignition.
  2. Disconnect the fuel injector harness multi-way connector.
  3. Replace the fuel injector fuse.
  4. Turn ON the ignition, with the engine OFF.
  5. Inspect the fuel injector fuse in the UBEC.
Is the fuse open?		 Go to Step 20  Go to Step 18 
5
  1. Turn OFF the ignition.
  2. Disconnect the fuel injector harness multi-way connector.
  3. Connect a test lamp between the ignition 1 voltage circuit engine harness side and a good ground.
  4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?		 Go to Step 18  Go to Step 19 
6
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Attempt to 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.
Does the DTC fail this ignition?		 Go to Step 7  Go to Diagnostic Aids
7 
  1. Turn OFF the ignition.
  2. Disconnect the fuel injector harness multi-way connector.
  3. Probe the appropriate fuel injector control circuit, at the powertrain control module (PCM) side, of the fuel injector harness multi-way connector with a test lamp connected to B+.
  4. Crank the engine.
Does the test lamp blink when cranking the engine?		 Go to Step 11  Go to Step 8 
8 Does the test lamp remain illuminated at all times? Go to Step 10  Go to Step 9 
9  Test the control circuit of the fuel injector for a short to voltage or an open between the multi-way connector and the PCM. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 17 
10 Test the control circuit of the fuel injector for a short to ground between the multi-way connector and the PCM. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 23 
11  Inspect the accessible fuel injector jumper harness between the multi-way connector and the plenum for the following conditions:
  • Poor connections at the multi-way connector
  • Damaged or pinched wiring
  • Broken wires inside the insulation

Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 12 
12
  1. Remove the upper intake manifold. Refer to Intake Manifold Removal - Upper .
  2. Probe the appropriate fuel injector control circuit, fuel injector side, at the multi-way connector, with a test lamp connected to B+.
Does the test lamp illuminate?		 Go to Step 21  Go to Step 13 
13 Test for continuity between the ignition voltage terminal and the appropriate fuel injector control circuit terminal, at the multi-way connector, with a DMM. Refer to Testing for Continuity .
Does the DMM indicate OL?		 Go to Step 14  Go to Step 16 
14 Test the control circuit of the fuel injector for an open, or poor connections at the fuel injector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 15 
15 Test the ignition voltage circuit of the fuel injector for an open between the fuel injector and the splice. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 22 
16  Test the control circuit of the fuel injector for a short to voltage, or a short to another circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 22 
17 Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 24  Go to Step 23 
18 Repair the open or short to ground in the ignition 1 voltage circuit between the multi-way connector and the splice.
Did you complete the repair?		 Go to Step 24  -
19 Repair the open in the ignition 1 voltage circuit between the multi-way connector and the UBEC. Refer to Wiring Repairs .
Did you complete the repair?		 Go to Step 24  -
20 Repair the short to ground in the ignition 1 voltage circuit between the multi-way connector and the UBEC. Refer to Wiring Repairs .
Did you complete the repair?		 Go to Step 24  -
21 Repair the short to ground in the fuel injector control circuit. Refer to Wiring Repairs .
Did you complete the repair?		 Go to Step 24  -
22 Replace the appropriate fuel injector. Refer to Fuel Injector Replacement .
Did you complete the replacement?		 Go to Step 24  -
23 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 24  -
24
  1. Clear the DTCs with a scan tool.
  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 2  Go to Step 25 
25 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
scientia non olet · About LEMON Manuals