Refer to
Shift Select Switch
for
electrical schematic.
Circuit Description
The Driver Select Shift System allows the driver to choose between two shift patterns, NORMAL and PERFORMANCE. Pressing the appropriate console button changes the shift pattern.
The Powertrain Control Module (PCM) provide an input voltage on circuit 553 to the Driver Select Shift Switch. The switch is then grounded through the PCM on circuit 452.
The PERFORMANCE shift pattern has the following characteristics:
| • | Higher engine speed upshifts |
| • | Downshifts occur at a lower percentage throttle position |
| • | Increased engine torque output during second and third gear operation |
Diagnostic Aids
| • | Inspect the I/P Fuse Block, Fuse 5. |
| • | Inspect the transmission connector for damaged or backed-out terminals. |
| • | Inspect the PCM connector for damaged or backed-out terminals. |
| • | Inspect the Driver Select Shift Switch connector and associated wiring. |
| • | Improperly installed aftermarket electronic equipment may modify the integrity of other systems. |
| • | Inspect for a wire that is broken or partially broken inside the insulation. A wire broken inside the insulation could cause a system malfunction but still test as working properly in a continuity or voltage check with a system disconnected. |
| Refer to Troubleshooting Procedures, Section 8. |
Test Description
The numbers below refer to the Step numbers on the accompanying diagnostic table.
-
This step test the operation of the Driver Select Shift Switch.
-
This step tests for system power on circuit 1141.
-
This step tests for ground on circuit 1250.
-
This step tests the PCM input feed circuit 553.
-
This step tests the Driver Select Shift Switch internal resistor.
-
This step tests the Driver Select Shift Switch operation.
-
This step tests the sensor ground circuit 452.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Does the scan tool indicate Normal and Performance correctly? | -- | Refer to Symptoms, Section 6 | |
2 |
Does the test lamp light? | -- | ||
3 | Repair the open in circuit 1141. Refer to Troubleshooting Procedures, Section 8. Did you find and correct the condition? | -- | -- | |
4 | Connect a test lamp between the vehicle wiring harness terminal A and terminal F. Does the test lamp light? | -- | ||
5 | Repair the open in circuit 1250. Refer to Troubleshooting Procedures, Section 8. Did you find and correct the condition? | -- | -- | |
6 | Using the J 39200 DVOM, measure the voltage between the vehicle wiring harness terminal G and ground. Does the DVOM indicate the specified voltage? | 5 volts | ||
7 |
Is the resistance within the specified range? | 315-385ohms | ||
8 | Inspect circuit 553 for an open or short to ground. Refer to Troubleshooting Procedures, Section 8. Did you find the condition? | -- | ||
9 |
Is the resistance greater than the specified value? | 2Mohms | ||
10 |
Is the resistance less than the specified value? | 10ohms | ||
11 | Repair the open in circuit 452. Refer to Troubleshooting Procedures, Section 8. Did you find and correct the condition? | -- | -- | |
12 | Inspect the Driver Select Shift Switch connector for poor contact. Did you find the condition? | -- | ||
13 | Replace the Driver Select Shift Switch. Is the replacement complete? | -- | -- | |
14 | Inspect the PCM connectors for poor contact. Did you find the condition? | -- | ||
15 | Replace the PCM. Refer to PCM Replacement, Section 7. Is the replacement complete? | -- | -- | |
16 | After the repair is complete, road test the vehicle. Ensure that the Driver Select Shift System is functioning properly in all modes. Has the test run and passed? | -- | System OK |
