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 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
4
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Disconnect the PCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
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 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.
Ignition on, engine not running.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage at the Transmission Control Relay Control circuit.
Is the voltage above 0.5 volts?
All
Yes
→ Repair the Transmission Control Relay Control circuit for a short
to voltage.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
No
→ Go To 6
268
TRANSMISSION - NGC
P0891-TRANSMISSION RLY ALWAYS ON —
Continued