P1768

Test 488-492:

Test 493-496:

Test 497-498:

SYMPTOM:
P1768-RELAY OUTPUT ALWAYS OFF

When Monitored and Set Condition:
P1768-RELAY OUTPUT ALWAYS OFF
When Monitored: Ignition key is turned from off position to run and/or ignition key is turned from crank position to run. The following conditions must be met for a successful OBDII trip: Engine must run > 2 mins, Turbine speed > 2 mins, if trans is below normal
Set Condition: operating temp, all fwd gears must be applied for 3.5 secs each and trans must be in park or neutral for 3.5 secs. If trans is hot, all fwd gears must be applied for 1.5 secs each and trans must be in park or neutral. No MIL lamp trouble codes

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
- TRANSMISSION CONTROL RELAY DEFECTIVE
- NO OUTPUT FROM TRANSMISSION CONTROL RELAY
- TCM TRANS RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
- INTERMITTENT CODE P1768