P1768

Test 1 Through 2:

Test 3 Through 7:

Test 8 Through 11:

Symptom:
P1768-RELAY OUTPUT ALWAYS OFF

When Monitored and Set Condition:
P1768-RELAY OUTPUT ALWAYS OFF

When Monitored:
Continuously after a controller reset (ignition key turned to the RUN position or when the cranking engine), the TCM then energizes the Trans Control Relay (switched battery).

Set Condition:
The codes sets when the Trans Control Module (TCM) senses less than 3 volts are present at the Trans Control Relay Output (switched Battery) terminals of the TCM, when the TCM is energizing the relay.

POSSIBLE CAUSES
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE
FUSED B(+) CIRCUIT TO TRANS CONTROL RELAY OPEN
TRANS CONTROL RELAY GROUND CIRCUIT OPEN
TRANSMISSION CONTROL RELAY CIRCUIT OPEN
TCM PIN 16 TO TCR OPEN
TCM PIN 17 TO TCR OPEN
NO OUTPUT FROM TRANSMISSION CONTROL RELAY
TRANSMISSION CONTROL RELAY DEFECTIVE
TCM DEFECTIVE
INTERMITTENT CODE P1768