P1633

Q1 : CHECK THE VOLTAGE SUPPLY TO THE POWERTRAIN CONTROL MODULE
1. Switch the ignition switch to the OFF position.
2. Remove the powertrain control module (PCM).
3. Switch the ignition switch to the RUN position.
4. Measure the voltage between the powertrain control module electrical connector FH1 pin 49, (SP) and ground.

Is the voltage greater than 10.5 volts?

Yes
INSTALL a new powertrain control module (PCM). CLEAR DTC. TEST the system for normal operation.

No
Repair the circuit between the powertrain control module electrical connector FH1 pin 49, (SP) and the spliced joint FHS-10. CLEAR DTC. TEST the system for normal operation.