Circuit Description
The Sport Mode shift program is available when the engine is running and the transmission is in Drive. Ignition voltage is supplied directly to the Sport Mode indicator bulb in the instrument cluster. The transmission control module (TCM) controls the lamp by grounding the control circuit with an internal driver. The Sport Mode Selector Switch signal circuit is pulled up to B+ within the TCM. The other side of the switch connects to ground. When the switch is closed, the signal voltage is pulled low. The TCM toggles the Sport Mode with each press of the button. The Sport Mode shift program enables upshifts in the high-output RPM range of the engine for maximum acceleration and line pressure profiles for firm shifts.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission ? | -- | Go to Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission | |||||||||
2 | Any DTCs must be corrected before performing this diagnostic procedure. Are any DTCs set? | -- | Go to the applicable DTCs | |||||||||
3 |
Does the Sport Mode indicator lamp turn ON and OFF? | -- | Go to Intermittent Conditions in Engine Controls | |||||||||
4 |
Does the display change back and forth between ON and OFF? | -- | ||||||||||
5 | Command the Sport Mode indicator lamp ON and OFF with the Scan Tool . Does the lamp turn ON and OFF? | -- | ||||||||||
6 | Is the lamp always ON? | -- | ||||||||||
Do other indicator lamps in the cluster operate? | -- | |||||||||||
8 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Does the test lamp illuminate? | -- | ||||||||||
9 | Test the Sport Mode Indicator Lamp circuit for the following conditions:
Did you find and correct a condition? | -- | -- | |||||||||
10 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Does the lamp illuminate? | -- | ||||||||||
11 | Does the display always indicate ON? | -- | ||||||||||
12 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Does the scan tool display change each time the jumper is momentarily connected? | -- | ||||||||||
13 |
Did you detect continuity? | -- | ||||||||||
14 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Connect the Sport Mode selector switch signal circuit (terminal 2 of the switch harness connector) to ground with a fused jumper wire while observing the Scan Tool . Does the display indicate ON? | -- | ||||||||||
15 |
Is the resistance within the specified range? | 0-5 ohms | ||||||||||
16 | Repair the short to ground in the lamp control circuit. Is the action complete? | -- | -- | |||||||||
17 | Repair the feed circuit to the instrument panel indicator lamps. Is the action complete? | -- | -- | |||||||||
18 | Repair the signal circuit shorted to ground. Is the action complete? | -- | -- | |||||||||
19 | Repair the open/high resistance signal circuit. Is the action complete? | -- | -- | |||||||||
20 | Test the ground circuit to the Sport Mode switch for the following conditions:
Did you find and correct the condition? | -- | ||||||||||
21 | Replace the Sport Mode switch. Is the action complete? | -- | -- | |||||||||
22 | Inspect the TCM harness connector for a poor connection or poor terminal tension. Refer to General Electrical Diagnosis in Wiring Systems. Did you find and correct the condition? | -- | ||||||||||
23 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Replace the TCM. Refer to Transmission Control Module Replacement . Is the action complete? | -- | -- | |||||||||
24 |
Caution: Apply the parking brake and block the drive wheels before performing this procedure in order to prevent bodily injury. Does the Sport Mode indicator lamp turn ON and OFF? | -- | System OK |
