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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. 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:  Tests the oil temperature normal operating range data using a scan tool.
DTC B1543

Step Action Values Yes No
Schematic Reference:  Instrument Cluster Schematics  
1 Did you perform the IPC Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Instrument Cluster 
2 
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. With a scan tool, observe the Oil Temp parameter in the IPC data 1 list.
Does the scan tool indicate that the Oil Temp parameter is within the specified range?		 -10 to +190°C (14-374°F) Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Go to Step 3 
3
  1. Turn the ignition OFF.
  2. Connect a 3-ampere fused jumper between the signal circuit of the engine oil temperature sensor and the low reference circuit of the engine oil temperature sensor.
  3. Turn the ignition ON, with the engine OFF.
  4. With a scan tool, observe the Oil Temp parameter.
Does the scan tool indicate that the Oil Temp parameter is greater than the specified value?		 190°C (374°F) Go to Step 6  Go to Step 4 
4 Test the signal circuit of the engine oil temperature sensor for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 5 
5 Test the low reference circuit of the engine oil temperature sensor for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
6 Inspect for poor connections at the harness connector of the engine oil temperature sensor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
8 Replace the engine oil temperature sensor. Refer to Engine Oil Temperature Gage Sensor Replacement Engine Mechanical.
Did you complete the replacement?		 - Go to Step 10  -
9 Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement .
Did you complete the replacement?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 - Go to Step 2  System OK
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