*NO RESPONSE FROM TCM (TRANSMISSION CONTROL MODULE) (2.8L)
For a complete wiring diagram Refer to Section 8W.
| Possible Causes |
| (A903) FUSED B(+) CIRCUIT OPEN OR SHORTED |
| (Z133) GROUND CIRCUIT OPEN |
| (F1) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED |
| (D25) PCI BUS CIRCUIT OPEN |
| TRANSMISSION CONTROL MODULE |
Diagnostic Test
1.TEST FOR INTERMITTENT CONDITIONNOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
Does the scan tool display a red X next to the module?
Yes
- Go To 2
No
- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2.(A903) FUSED B(+) CIRCUIT OPEN OR SHORTED
Does the test light illuminate brightly?
Yes
- Go To 3
No
- Repair the (A903) Fused B(+) circuit for an open or short.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.
3.(Z133) GROUND CIRCUIT OPEN
Does the test light illuminate brightly for each circuit?
Yes
- Go To 4
No
- Repair the (Z133) ground circuit for an open.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.
4.(F1) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED
Does the test light illuminate brightly?
Yes
- Go To 5
No
- Repair the (F1) Fused Ignition Switch Output circuit for an open or short.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.
5.(D25) PCI BUS CIRCUIT OPEN
Is the resistance below 5.0 ohms?
Yes
- Replace the Transmission Control Module in accordance with the service information.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.
No
- Repair the (D25) PCI Bus circuit for an open.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.