TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, Check the STARTS SINCE SET counter for P0891.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter equal to 0?
All
Yes
→ Go To 3
No
→ Go To 7
3
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Fused B+ circuit and the Transmission Control
Relay Output Circuit in the Transmission Control Relay.
Is the resistance above 5.0 ohms?
All
Yes
→ Go To 4
No
→ Replace the Transmission Control Relay.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
4
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Measure the voltage at the Transmission Control Relay Output circuit in the
Transmission Control Relay connector.
Is the voltage above 0.5 volts?
All
Yes
→ Repair the Transmission Control Relay Output circuit for a short
to voltage.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
NOTE: The Transmission Controller will power up the Transmission Con-
trol Relay Control circuit for approximately 3.0 seconds after initial igni-
tion on. Wait at least 3.0 seconds before performing the following voltage
check.
NOTE: A One-trip fault may set for P0888 Relay Always Off, disregard the
DTC.
Measure the voltage at the Transmission Control Relay Control circuit after a 3.0
second wait period.
Is the voltage above 0.5 volts?
All
Yes
→ Repair the Transmission Control Relay Control circuit for a short
to voltage.
Perform 40/41TE (NGC) TRANSMISSION VERIFICATION
TEST - VER 1.
No
→ Go To 6
120
TRANSMISSION - NGC
P0891-TRANSMISSION RLY ALWAYS ON —
Continued