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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Control System & Fuel System - 3.7L - DTC P0365 To DTC P1107) >> DTC P0453 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  This step determines if the condition is present.
  1. 4:  This step tests the signal circuit of the FTP sensor.
  2. 5:  This step tests the ground circuit of the FTP sensor.
  3. 8:  This step tests the 5-volt reference circuit of the FTP sensor.
DTC P0453

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls 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 OFF the ignition.
  2. Remove the fuel cap.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the Fuel Tank Pressure Sensor parameter with a scan tool.
Is the Fuel Tank Pressure Sensor parameter more than the specified value?		 4.3 V 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. Turn ON the ignition, with the engine OFF.
  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. Install the fuel cap.
  2. Disconnect the fuel tank pressure (FTP) sensor.
  3. Observe the Fuel Tank Pressure Sensor parameter with a scan tool.
Is the Fuel Tank Pressure Sensor parameter more than the specified value?		 0.2 V Go to Step 7  Go to Step 5 
5  Measure the voltage on the FTP low reference circuit.
Is the voltage below the specified value?		 1 V Go to Step 6  Go to Step 11 
6 Test the FTP low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 8 
7 Test the FTP signal circuit for a short to voltage or for a short to a 5-volt reference circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
8  Measure the voltage of the FTP 5-volt reference circuit with a DMM. Refer to Circuit Testing .
Is the Fuel Tank Pressure Sensor parameter within the specified value?		 4.8-5.2 V Go to Step 10  Go to Step 12 
9 Test for an intermittent and for a poor connection at the control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
10 Test for an intermittent and for a poor connection at the FTP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
11 Repair the short to voltage in the FTP low reference circuit.
Did you complete the repair?		 - Go to Step 15  -
12 Repair the short to voltage in the FTP 5-volt reference circuit. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 15  -
13 Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the powertrain control module (PCM). Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 15  -
15
  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 16 
16 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
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