P1768

Test 386 - 390:

Test 391 - 394:

Test 395 - 396:

Symptom:
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 7 volts 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 CAUSING SYMPTOM
FUSED B(+) CIRCUIT TO TRANS CTRL RELAY OPEN
TCR GROUND CIRCUIT OPEN
TRANSMISSION CONTROL RELAY CIRCUIT OPEN
TCM PIN 16 TO TCR OPEN OR BAD CONNECTION
TCM PIN 17 TO TCR OPEN OR BAD CONNECTION
NO OUTPUT FROM TRANSMISSION CONTROL RELAY
TRANSMISSION CONTROL RELAY DEFECTIVE
TCM DEFECTIVE
INTERMITTENT CODE P1768