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Test Description

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

  1. 3:  Tests for the proper operation of the signal circuit in the high voltage range.
  2. 4:  Tests for the proper operation of the signal circuit in the low voltage range. If the fuse in the jumper opens upon performing this test, the signal circuit has a short to voltage.
  3. 5:  Tests for a short to ground in the 5-volt reference circuit.
DTC B1826

Step Action Values Yes No
Schematic Reference: Memory Seats Schematics 
1 Did you perform the Power Seat Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Power Seat Systems 
2
  1. Install a scan tool.
  2. With a scan tool, observe the recline position sensor parameter in the data list for the memory seat module.
Is the recline position sensor parameter within the specified range?		 ..39-4.58 V Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS Go to Step 3 
3 
  1. Disconnect the recline position sensor.
  2. With a scan tool, observe the recline position sensor parameter.
Is the recline position sensor parameter greater than the specified value?		 4.58 V Go to Step 4  Go to Step 8 
4 
  1. Connect a 3-ampere fused jumper wire between the signal circuit of the recline position sensor and the low reference circuit of the recline position sensor.
  2. With a scan tool, observe the recline position sensor parameter.
Is the recline position sensor parameter less than the specified value?		 .39 V Go to Step 5  Go to Step 9 
5 
  1. Disconnect the fused jumper wire.
  2. Connect a 3-ampere fused jumper wire between the 5-volt reference circuit of the recline position sensor and the signal circuit of the recline position sensor.
  3. With a scan tool, observe the recline position sensor parameter.
Is the recline position sensor parameter greater than the specified value?		 4.58 V Go to Step 7  Go to Step 6 
6 Test the 5-volt reference circuit of the recline position sensor for a short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
7 Test the 5-volt reference circuit of the recline position sensor for one of the following conditions:
  • A short to voltage
  • A high resistance
  • An open

Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 11 
8 Test the signal circuit of the recline position sensor for a short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
9 Test the signal circuit of the recline position sensor for one of the following conditions:
  • A short to voltage
  • A high resistance
  • An open

Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 10 
10 Test the low reference circuit of the recline position sensor for one of the following conditions:
  • A high resistance
  • An open

Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
11 Inspect for poor connections at the harness connector of the recline position sensor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and to CONNECTOR REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
12 Inspect for poor connections at the harness connector of the memory seat module. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and to CONNECTOR REPAIRS .
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
13 Replace the recline adjuster motor. Refer to Seat Adjuster Motor Replacement - Front .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the memory seat module. Refer to Memory Seat Control Module Replacement .
Did you complete the replacement?		 - Go to Step 15  -
15
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the system in order to verify the repair.
Does the DTC reset?		 - Go to Step 2  System OK
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