Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Powertrain On-Board Diagnostic (OBD) System Check performed?
| --
|
Go to Step 2
| Go to
Powertrain On Board Diagnostic (OBD) System Check .
|
2
|
- Disconnect the transmission 20-way connector.
- Install the
J 39775 Jumper Harness on the transmission side of the 20-way connector.
- Start the engine.
- Using the
J 39200 DVOM and the
J 35616-A Connector Test Adapter Kit, measure the resistance between the ground and each terminal N, R, and P.
- Move the gear selector through each gear range.
Does the resistance match the chart?
| Refer to the Pressure Switch Assembly Resistance Table found in
Electronic Component Description
|
Go to Step 3
|
Go to Step 7
|
3
|
- Turn the ignition Off
- Install the
J 39775 on the engine side of the 20-way connector.
- Measure the resistance between the ground and each of the engine wiring harness terminals N, R, and P.
Was low resistance measured?
| --
|
Go to Step 4
| Go to
Automatic Transmission Internal Wiring Harness Check
|
4
|
- Disconnect the C3 (clear) VCM connector.
- Recheck the resistance of the vehicle wiring harness from ground to the transmission connector terminals N, R, and P.
Was low resistance measured?
| --
|
Go to Step 5
|
Go to Step 6
|
5
| Repair the short on the vehicle wiring harness. Refer to Electrical Diagnosis, Section 8.
Is the repair complete?
| --
| Verify the repair and exit from the table
| --
|
6
| Replace the VCM. Refer to VCM Replacement, Section 6.
Is the replacement complete?
| --
| Verify the repair and exit from the table
| --
|
7
| Does the resistance measure low when the chart indicates high?
| --
|
Go to Step 8
|
Go to Step 10
|
8
|
- Remove the transmission bottom pan.
- Check the resistance at the transmission 20-way connector terminals while wiggling the internal transmission harness wires to the TFP VAL POSITION SW.
Does the resistance indicate low?
| --
|
Go to Step 9
|
Go to Step 13
|
9
| Recheck the resistance with the TFP VAL POSITION SW disconnected from the transmission internal wiring harness.
Does the resistance go from low to high?
| --
|
Go to Step 12
| --
|
10
| Does the resistance measure high when the chart indicates low?
| --
|
Go to Step 11
| --
|
11
|
- Remove the transmission bottom pan.
- Disconnect the transmission internal wiring harness from the TFP VAL POSITION SW.
- Measure the resistance from the transmission 20-way connector terminals to the wiring harness TFP VAL POSITION SW terminal combinations: N to C, R to E, and P to D.
Is the resistance low:
| --
|
Go to Step 12
|
Go to Step 13
|
12
| Replace the TFP VAL POSITION SW. Refer to TFP VAL POSITION SW Replacement.
Is the replacement complete?
| --
| Verify the repair and exit from the table
| --
|
13
| Replace the internal transmission wiring harness. Refer to Internal Transmission Wiring Harness Replacement.
Is the replacement complete?
| --
| Verify the repair and exit from the table
| --
|
