*NO RESPONSE FROM TCM - NAG1/DIESEL

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(Z904) GROUND CIRCUIT OPEN

(F946) TRANSMISSION RELAY OUTPUT CIRCUIT OPEN OR SHORT

(D223) SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE

(D65) CAN C BUS (+) CIRCUIT OPEN

(D64) CAN C BUS (-) CIRCUIT OPEN

TRANSMISSION CONTROL MODULE

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU view.

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.

NOTE: Check the FCM for any active CAN C hardware and any ignition related DTCs, perform DTCs before proceeding.

NOTE: Ensure the (D223) SCI Transmit circuit is not shorted to voltage. This condition could potentially cause a no response condition to the TCM.

Does the scan tool display a red X next to the module?

Yes

Go To 2

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. (Z904) GROUND CIRCUIT OPEN