No Response From Shift Lever Assembly

POSSIBLE CAUSES
- Traction system relay output circuit open
- Fused ignition switch output circuit open
- Ground circuit open
- SCI transmit circuit open
- SCI transmit circuit shorted to ground
- SCI transmit circuit shorted to voltage
- Shift lever assembly

Diagnostic Test




1. TRACTION SYSTEM RELAY OUTPUT CIRCUIT OPEN

Turn the ignition off.
Disconnect the SLA harness connector.

NOTE: Check connector Clean/repair as necessary.

Turn the ignition on.
Measure the voltage of the Traction System Relay Output circuit at the SLA harness connector.

Q: Is the voltage above 10 volts?

YES: Go to 2
NO: Repair the Traction System Relay Output circuit for an open. Perform NAG1 TRANSMISSION VERIFICATION TEST.




2. FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN

With the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the SLA harness connector.

Q: Is the voltage above 10 volts?

YES: Go to 3
NO: Repair the Fused Ignition Switch Output circuit for an open. Perform NAG1 TRANSMISSION VERIFICATION TEST.




3. GROUND CIRCUIT OPEN

Turn the ignition off.
Measure the resistance of the Ground circuit from the SLA harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 4
NO: Repair the Ground circuit for an open. Perform NAG1 TRANSMISSION VERIFICATION TEST.




4. SCI TRANSMIT CIRCUIT OPEN

With the ignition off.
Measure the resistance of the SCI Transmit circuit from the SLA harness connector to the DLC.

Q: Is the resistance below 5.0 ohms?

YES: Go to 5
NO: Repair the SCI Transmit circuit for an open. Perform NAG1 TRANSMISSION VERIFICATION TEST.




5. SCI TRANSMIT CIRCUIT SHORTED TO GROUND

With the ignition off. Measure the resistance between ground and the SCI Transmit circuit.

Q: Is the resistance below 100 kohms?

YES: Repair the SCI Transmit circuit for a short to ground. Perform NAG1 TRANSMISSION VERIFICATION TEST.
NO: Go to 6




6. SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE

Turn the ignition on.
Measure the voltage of the SCI Transmit circuit at the SLA.

Q: Is the voltage above 0.5 volt?

YES: Repair the SCI Transmit circuit for a short to voltage. Perform NAG1 TRANSMISSION VERIFICATION TEST.
NO: Replace the Shift Lever Assembly.