TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, read DTC’s.
Are any communication DTCs present?
All
Yes
→ If any bus DTC’s are present, disregard the P1793 DTC and refer
to the communication category and perform the appropriate
symptom.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 3
3
With the DRBIII
t, Check the STARTS SINCE SET counter.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET equal to 0?
All
Yes
→ Go To 4
No
→ Go To 9
4
Turn the ignition off to the lock position.
Disconnect the ECM harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Torque Management Request Sense circuit from the
TCM harness connector to the ECM harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Torque Management Request Sense circuit for an
open.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off to the lock position.
Disconnect the ECM harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Torque Management Request Sense
circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair Torque Management Request Sense circuit for a short to
ground.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Turn the ignition off to the lock position.
Disconnect the TCM harness connector.
Ignition on, engine not running.
Measure the voltage of the Torque Management Request Sense circuit.
Is the voltage above 10.5 volts?
All
Yes
→ Repair Torque Management Request Sense circuit for a short to
voltage.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 7
141
TRANSMISSION - EATX
P1793-TRD LINK COMMUNICATION ERROR —
Continued