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Home >> Cadillac >> 2006 >> Escalade AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC P2068 >> Test Description

Test Description

The number below refers to the step number on the diagnostic table.

  1. 3:  Tests for the proper operation of the circuit in the low voltage range.
DTC P2068

Step Action Value(s) Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install the scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, observe the Fuel Tank Level Remaining % parameter in the powertrain control module (PCM) enhanced evaporative emission (EVAP) Data data list.
Does the scan tool indicate that the Fuel Tank Level Remaining % parameter is less than the specified value?		 4% Go to Step 3  Go to Diagnostic Aids
3 
  1. Turn OFF the ignition.
  2. Disconnect C152.
  3. Connect a 3-amp fused jumper wire between the signal circuit of the fuel level sender and the low reference circuit of the fuel level sender on the male terminal side.
  4. Turn ON the ignition, with the engine OFF.
  5. With a scan tool, clear the DTCs.
  6. With the scan tool, observe the Fuel Tank Level Remaining % parameter.
Does the scan tool indicate that the Fuel Tank Level Remaining % parameter is greater than the specified value?		 98% Go to Step 6  Go to Step 4 
4 Test the signal circuit of the fuel level sender for an open, a high resistance, or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 5 
5 Test the low reference circuit of the fuel level sender for an open, a high resistance, or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 9 
6 Test the signal circuit of the fuel level sender for an open, a high resistance, or a short to voltage between C152 and the fuel level sender. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 7 
7 Test the low reference circuit of the fuel level sender for an open, a high resistance, or a short to voltage between C152 and the fuel level sender. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 8 
8 Inspect for poor connections at the harness connector of the fuel level sender. 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 12  Go to Step 10 
9 Inspect for poor connections at the harness connector of the powertrain control module (PCM). 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 12  Go to Step 11 
10 Replace the fuel level sender. Refer to the following procedures:
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 12  -
12
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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