TEST ACTION APPLICABILITY
2 With the DRBIIIt, 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
134
TRANSMISSION - NGC
P0891-TRANSMISSION RLY ALWAYS ON — Continued
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