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Home >> Saturn >> 2004 >> Ion 1 Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - AF23-5 (Troubleshooting) >> Troubleshooting >> Range Selector Displays Incorrect Range >> Test Description

Test Description

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

  1. 4:  By disconnecting the TR switch, the voltage path for all TR switch circuits would be removed and the TCM should recognize all circuits as open. The scan tool should display LOW for all range signals.
  2. 5:  This step tests the TR switch wiring for an open or lack of ground from the TCM.
  3. 6:  This step tests the TR switch wiring and the TCM by providing a voltage path through a fused jumper wire. When jumpered, the scan tool range signal A should change to HI.
  4. 7:  This step tests the TR switch wiring and the TCM by providing a voltage path through a fused jumper wire. When jumpered, the scan tool range signal B should change to HI.
  5. 8:  This step tests the TR switch wiring and the TCM by providing a voltage path through a fused jumper wire. When jumpered, the scan tool range signal C should change to HI.
Range Selector Displays Incorrect Range

Step Action Values Yes No
1
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select TR Sw. on the scan tool.
  4. With the scan tool, observe the TR Sw. display while selecting each transmission range: P, R, N, D, I and L.
Does each selected transmission range match the scan tool TR Sw. display?		 - Go to Intermittent Conditions in Engine Controls - 2.2 L (L61) Go to Step 2 
2
  1. Inspect the park/neutral position (PNP) switch assembly for the following:
  2. Inspect the shift cable for the following:
Did you find and correct a condition?		 - Go to Step 15  Go to Step 3 
3 With the scan tool, observe the TR Sw. A/B/C/P display.
Does the scan tool TR Sw. A/B/C/P parameter indicate LOW for all range signal states?		 - Go to Step 12  Go to Step 4 
4 
  1. Turn OFF the ignition.
  2. Disconnect the TR switch 10-way connector.
  3. Turn ON the ignition, with the engine OFF.
Does the scan tool TR Sw. A/B/C/P parameter indicate LOW for all range signal states?		 - Go to Step 5  Go to Step 9 
5 
  1. Using the digital multimeter (DMM) and the J-35616  connector test adapter kit, measure the voltage from Signal A of the TR switch 10-way connector to B+.
  2. Measure the voltage from Signal B of the TR switch 10-way connector to B+.
  3. Measure the voltage from Signal C of the TR switch 10-way connector to B+.
  4. Measure the voltage from Signal P of the TR switch 10-way connector to B+.
Does the voltage measure within the specified value at all four terminals?		 10-12 V Go to Step 6  Go to Step 10 
6  Connect a fused jumper wire from the TR switch 10-way connector, signal A circuit, to B+ while monitoring the scan tool TR Sw. A/B/C/P parameter.
When the signal A circuit is jumpered, do any other signal circuits indicate HI?		 - Go to Step 11  Go to Step 7 
7  Connect a fused jumper wire from the TR switch 10-way connector, signal B circuit, to B+ while monitoring the scan tool TR Sw. A/B/C/P parameter.
When the signal B circuit is jumpered, do any other signal circuits indicate HI?		 - Go to Step 11  Go to Step 8 
8  Connect a fused jumper wire from the TR switch 10-way connector, signal C circuit, to B+ while monitoring the scan tool TR Sw. A/B/C/P parameter.
When the signal C circuit is jumpered, do any other signal circuits indicate HI?		 - Go to Step 11  Go to Step 13 
9 Test the signal circuit or circuits of the TR switch that did not indicate LOW for a short to voltage.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
10 Test the signal circuit or circuits of the TR switch that did not indicate proper voltage for an open.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
11 Test the affected signal circuits of the TR switch for a shorted together condition.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
12 Test the voltage supply circuit of the TR switch for an open or short to ground.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
13 Replace the TR switch. The TR switch is part of the park/neutral position switch.
Refer to Park/Neutral Position Switch Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the TCM.
Refer to Transmission Control Module (TCM) Replacement .
Did you complete the replacement?		 - Go to Step 15  -
15
  1. Turn ON the ignition, with the engine OFF.
  2. With the scan tool, observe the TR Sw. display while selecting each transmission range: P, R, N, D, I and L.
Does each selected transmission range match the scan tool TR Sw. display?		 - System OK Go to Step 2 
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