Inspection and Verification
- Verify the customer concern by operating the transmission external control.
- Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart: VISUAL INSPECTION CHART Mechanical Electrical Damaged shift lock actuator Damaged transmission control (TC) switch Damaged shift interlock switch Failed fuse(s): F20 (10A) F22 (15A) Damaged wiring harness Loose or corroded connections Damaged shift interlock switch
- If the fault is not visually evident, determine the symptom. Go to «Symptom Chart»(ref-270942-S17570460322007111500000) .
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| Shift interlock system does not release/lock correctly | Circuitry Fuse(s): F20 (10A) F22 (15A) Brake pedal position (BPP) switch Brake shift interlock actuator Brake shift interlock actuator module | Go to Pinpoint Test A . |
| Selector lever is out of correct gear relationship | Selector lever cable and bracket Retainer bracket Selector lever linkage | Go to Pinpoint Test B . |
| Transmission range indicator does not correspond to the gear | Selector lever cable bracket | TIGHTEN the bolts holding the selector lever cable bracket. |
| Selector lever cable loose from the transmission retainer bracket | TIGHTEN the selector lever cable. | |
| Selector lever linkage | VERIFY selector lever cable adjustment. REFER to Selector Lever Cable Adjustment - 6R60 or Selector Lever Cable Adjustment - 5R55S . ADJUST selector lever cable if necessary. VERIFY digital transmission range (TR) sensor for correct adjustment. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S . | |
| Transmission control (TC) switch is not operating correctly | Fuse F20 (10A) TC switch TC switch not cycled during self-test Powertrain control module (PCM) Circuitry | Go to Pinpoint Test C . |
| Transmission control indicator lamp (TCIL) is not operating correctly | Bulb Circuitry PCM | REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION . |
| Rattle, buzz or other noise | Selector lever knob | INSTALL a new selector lever knob. REFER to Selector Lever Knob . |
| Selector lever loose | TIGHTEN housing bolts to specification. | |
| Water enters inside the vehicle | Cable assembly grommet | SECURE grommet to floor panel. |
| Transmission cover plate loose | SECURE transmission cover plate to floor or INSTALL a new transmission cover plate. | |
| Torn cable assembly grommet | INSTALL new selector lever cable. REFER to Selector Lever Cable . | |
| Excessive shift effort | Selector lever cable | INSTALL a new selector lever cable. REFER to Selector Lever Cable . |
| Cable routing | ROUTE the cable to prevent binding. | |
| Cable bracket loose | TIGHTEN cable bracket bolts to specification. ADJUST cable. | |
| Selector lever will not shift | Selector lever cable | INSTALL a new selector lever cable. REFER to Selector Lever Cable . |
| Transmission manual lever jammed | INSTALL a new manual lever. | |
| Selector lever knob | INSTALL a new selector lever knob. REFER to Selector Lever Knob in this. | |
| Broken selector lever | INSTALL a new selector lever. REFER to Selector Lever . |
Symptom Chart
Scheme 34
| Pin Number | Circuit Description |
|---|---|
| 1 | Brake pedal position (BPP) switch output |
| 2 | Voltage supplied at all times |
Scheme 35
| Pin Number | Circuit Description |
|---|---|
| 1 | Brake shift interlock actuator |
| 2 | |
| 3 | Brake shift interlock actuator |
Scheme 36
| Pin Number | Circuit Description |
|---|---|
| 1 | B+ in Start and Run |
| 2 | Transmission control/overdrive cancel (TC) switch |
| 3 | Solenoid key lock (inhibit removal) |
| 4 | Neutral switch sense input (6R60 with trailer tow) |
| 5 | Neutral switch sense input ground (6R60 with trailer tow) |
| 6 | Ground |
| 7 | IP/switch illumination |
| 8 | Switch - brake pedal position (BPP) normal open |
Scheme 37
| Pin Number | Circuit Description |
|---|---|
| 1 | Key out switch |
| 2 | Ground |
| 3 | Illumination |
| 4 | Key out switch |
| 5 | Brake |
| 6 | B+ in Start and Run |
| 7 | TC switch |
Scheme 38
| Pin Number | Circuit Description |
|---|---|
| 12 | B+ in Start and Run |
Scheme 39
| Pin Number | Circuit Description |
|---|---|
| 28 | B+ At all times |
Scheme 40
| Pin Number | Circuit Description |
|---|---|
| 29 | Transmission control (TC)/overdrive cancel switch |
PINPOINT TEST B: SELECTOR LEVER IS OUT OF CORRECT GEAR RELATIONSHIP
- B1 CHECK THE SELECTOR LEVER LINKAGE Key in ON position. Apply the brake pedal. Gain access to the selector lever linkage. Actuate the selector lever in all ranges. Observe all linkages during operation. Is the linkage damaged? YES : INSTALL a new selector lever. TEST the system for normal operation. NO : Go to B2 .
- B2 CHECK THE SELECTOR LEVER CABLE Check the selector lever cable and bracket installation and tightness. Is the selector lever cable correctly installed and adjusted? YES : VERIFY the selector lever cable adjustment. REFER to «Selector Lever Cable Adjustment - 6R60»(ref-270942-S15633914082007110700000) or «Selector Lever Cable Adjustment - 5R55S»(ref-270942-S12848554242007110700000) . ADJUST the selector lever cable if necessary. VERIFY the digital transmission range (TR) sensor for correct adjustment. REFER to «AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S»(ref-270891) . ADJUST the TR sensor if necessary. Go to B3 . NO : REPAIR as necessary. TEST the system for normal operation.
- B3 CHECK THE LINKAGE/CABLE FOR CORRECT GEAR RELATIONSHIP Apply the brake pedal. Actuate the selector lever in all ranges. Does the indicator match the gear selection? YES : System OK. TEST the system for normal operation. NO : REFER to «Selector Lever Cable Adjustment - 6R60»(ref-270942-S15633914082007110700000) or «Selector Lever Cable Adjustment - 5R55S»(ref-270942-S12848554242007110700000) . TEST the system for normal operation.
Scheme 41
Scheme 42
Scheme 43
Scheme 44
Scheme 45
- C1 CHECK SMART JUNCTION BOX (SJB) FUSE F20 (10A) Key in OFF position. Check fuse: SJB F20 (10A) Is the resistance less than 5 ohms? YES : REINSTALL the fuse. Go to C3 . NO : INSTALL a new fuse. TEST the system for normal operation. If the fuse fails again, go to C2 .
- C2 CHECK THE CIRCUIT FOR A SHORT TO GROUND Disconnect: Powertrain Control Module (PCM) C175b Inspect for damaged or pushed-out pins, corrosion or loose wires. Repair as necessary. Measure the resistance between PCM C175b-29 and ground. Is the resistance greater than 10,000 ohms? YES : Go to C3 . NO : REPAIR circuit. TEST the system for normal operation.
- C3 CHECK THE TC SWITCH CIRCUIT FOR VOLTAGE Disconnect: PCM C175b Inspect for damaged or pushed-out pins, corrosion or loose wires. Repair as necessary. Leave PCM disconnected Key in ON position. Measure the voltage between PCM C175b-29 and ground while cycling the TC switch several times. Does the voltage cycle? YES : INSTALL a new PCM. TEST the system for normal operation. NO : Go to C4 .
- C4 CHECK THE CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: Smart Junction Box (SJB) C2280c Disconnect: Selector Lever C2008 Inspect both ends for damaged or pushed-out pins, moisture, corrosion or loose wires. Repair as necessary. Measure the resistance between SJB C2280c-12 and selector lever C2008-1, harness side. Measure the resistance between PCM C175b-29 and selector lever C2008-2, harness side. Is the resistance less than 5 ohms for both circuits? YES : Go to C5 . NO : REPAIR open circuit. RECONNECT all components. TEST the system for normal operation.
- C5 CHECK THE CIRCUIT FOR A SHORT TO POWER Measure the voltage between PCM C175b-29 and ground. Is the voltage greater than 10 volts? YES : INSTALL a new transmission control switch. RECONNECT all components. TEST the system for normal operation. NO : REPAIR circuit. TEST the system for normal operation.