Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPONTIAC1997GRAND PRIX GTP, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - TESTS W/CODES - 3.1L ENGINE)DIAGNOSTIC TROUBLE CODESDTC P0706 - TRANSAXLE RANGE SWITCH PERFORMANCEDIAGNOSTIC PROCEDURES
1997 Pontiac Grand Prix GTP, 4D Sedan
Diagnostic Procedures
1997 Pontiac Grand Prix GTP, 4D SedanSECTION Diagnostic Procedures
WARNING: This page is about a different variant/trim than selected.
- Perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING - 3.1L article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
- If DTC P0705 is also set, diagnose DTC P0705 before proceeding. If DTC is not set, go to next step.
- Turn ignition on. Place gear selector in Park. Using scan tool, read TRANS RANGE display. If scan tool displays P-N, go to next step. If scan tool does not display P-N, go to step 5).
- Place gear selector in Neutral. Read scan tool TRANS RANGE display. If scan tool displays P-N, see DIAGNOSTIC AIDS. If scan tool does not display P-N, go to next step.
- Read scan tool TR PABC display. If scan tool displays P=O A=O B=O C=O, go to next step. If display is not as specified, go to step 10).
- Disconnect TRS 4-pin harness connector. If scan tool displays P=O A=O B=O C=O, go to next step. If display is not as specified, go to step 8).
- Turn ignition off. Disconnect PCM. Check TRS input circuit for being pinched or shorted to ground. If a problem is found, repair as necessary. After repairs, go to step 12). If no problem is found, go to step 11).
- Attempt to adjust PNP/TRS switch. Read scan tool TRANS RANGE display with Park and Neutral selected. If scan tool displays P-N, go to step 12). If scan tool does not display P-N, go to next step.
- Ensure wires in TRS 4-pin harness connector are not crossed. If a problem is found, repair as necessary. After repairs, go to step 12). If no problem is found, go to next step.
- Replace TRS. After replacing switch, go to step 12).
- Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
- Clear DTCs. Observe scan tool display while placing gear selector in each gear position. Record TR PABC status for each gear position. Compare scan tool display for each gear position with TRANSAXLE RANGE SWITCH VALID INPUT COMBINATIONS table. If scan tool display matches table entries for each gear selected, repair is complete. If scan tool display does not match table entries, return to step 3).
TRANSAXLE RANGE SWITCH VALID INPUT COMBINATIONS
| Gear Selector Position | Scan Tool TR PABC Display |
|---|---|
| Park | P=O A=O B=X C=X |
| Reverse | P=X A=O B=O C=X |
| Neutral | P=O A=X B=O C=X |
| Drive 4 | P=X A=X B=O C=O |
| Drive 3 | P=O A=O B=O C=O |
| Drive 2 | P=X A=O B=X C=O |
| Drive 1 | P=O A=X B=X C=O |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.