TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
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 resistance of the (K6) 5 volt Supply circuit from the TP Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the (K6) TP Sensor 5 volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K6) 5 volt Supply circuit at the TP
Sensor harness connector.
Is the resistance above 100k ohms?
All
Yes
→ Go To 7
No
→ Repair the (K6) 5 volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
Turn the ignition off.
Disconnect the TP Sensor harness connector.
With the DRBIII
t, monitor the TP Sensor voltage.
Ignition on, engine not running.
Connect a jumper wire between the (K22) TP Signal circuit and the (K4) Sensor
ground circuit .
Does the TP Sensor voltage change from approximately 4.9 volts to below 0.5 of a
volt?
All
Yes
→ Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
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 resistance of the (K22) TP Signal circuit from the TP Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the (K22) TP Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
285
DRIVEABILITY - NGC
P2074-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION -
HIGH FLOW/VACUUM LEAK —
Continued