Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Install the J 39775
jumper harness on the transmission side of the 20-way connector, if
needed.
- Using the J 39200
digital multimeter (DMM) and J 35616-A
connector test adapter kit, measure the resistance from terminal
U to the transmission case.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 3
|
Go to Step
2
|
2
|
- Disconnect the internal transmission harness from the TFP manual
valve position switch.
- Measure the resistance from terminal D to the TFP manual valve
position switch housing.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 15
|
Go to Step
17
|
3
| Measure the resistance from terminal N to the transmission
case.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 5
|
Go to Step 4
|
4
|
- Disconnect the internal transmission harness from the TFP manual
valve position switch.
- Measure the resistance from terminal A to the TFP manual valve
position switch housing.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 15
|
Go to Step 17
|
5
| Measure the resistance from
terminal R to the transmission case.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 7
|
Go to Step 6
|
6
|
- Disconnect the internal transmission harness from the TFP manual
valve position switch.
- Measure the resistance from terminal B to the TFP manual valve
position switch housing.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 15
|
Go to Step 17
|
7
| Measure the resistance from
terminal P to the transmission case.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 9
|
Go to Step 8
|
8
|
- Disconnect the internal transmission harness from the TFP manual
valve position switch.
- Measure the resistance from terminal C to the TFP manual valve
position switch housing.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 15
|
Go to Step 17
|
9
|
- Start the engine and let the engine idle.
- Set the parking brake
- Place the gear selector in PARK (P).
- Measure the resistance from terminal U to the transmission case.
Is the resistance more than the value shown?
| 50 K ohms
|
Go to Step 10
|
Go to Step 17
|
10
|
- Place the gear selector in REVERSE (R).
- Measure the resistance from terminal P to the transmission case.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 11
|
Go to Step
17
|
11
|
- Place the gear selector in DRIVE (D4).
- Measure the resistance from terminal N to the transmission case.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 12
|
Go to Step
17
|
12
| Measure the resistance from terminal R to the transmission
case.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 13
|
Go to Step
17
|
13
|
- Place the gear selector in Low (D1).
- Measure the resistance from terminal N to the transmission case.
Is the resistance less than the value shown?
| 50 ohms
|
Go to Step 14
|
Go to Step
17
|
14
| Measure the resistance from terminal P to the transmission
case.
Is the resistance less than the value shown?
| 50 ohms
| System OK
|
Go to Step 17
|
15
| Inspect for high resistance:
| • | Inspect the transmission wiring for poor electrical connections
at the transmission 20-way connector and at the TFP manual valve position
switch connector. |
| • | Look for possible bent, backed out, deformed, or damaged terminals. |
| • | Inspect for reduced terminal tension. |
Was the condition found?
| --
|
Go to Step
1
|
Go to Step 16
|
16
| Replace the internal wiring harness.
Refer to Wire Harness Disconnect
and Wiring Harness Removal
in the 4T40-E/4T45-E Section of the Transmission
Unit Repair Manual.
Is the replacement complete?
| --
|
Go to Step
1
| --
|
17
| Replace the TFP manual valve position switch.
Refer to Transmission Fluid Pressure (TFP) Switch Removal
in the 4T40-E/4T45-E
Section of the Transmission Unit Repair Manual.
Is the replacement complete?
| --
|
Go to Step
1
| --
|
