P0690 is an OBD-II generic code for a high voltage problem with the power supply to the ECM/PCM. This means the vehicle’s computer is not receiving voltage that is within the manufacturer’s parameters.
Where is the ECM power relay?
engine main fuse relay control box
The relay is located in the engine main fuse relay control box. The defective ECM-power relay is removed from the control box by pulling it straight up and out of socket. The new ECM-power relay is installed into the socket and the engine scanned for codes.
What is a ECM PCM power relay?
The engine control module (ECM) or powertrain control module (PCM) runs various processes in the engine and (in the case of the PCM) the transmission to achieve maximum efficiency. The PCM regularly checks the voltage condition in the power relay control circuit that delivers battery voltage to the ECM/PCM.
How do you test a PCM power relay?
Zitat von Youtube: And you want to connect one side to 285. And the other side to 86. And you're gonna hear it click to make sure you connect.
How do I fix code P0685?
What repairs can fix the P0685 code?
- Repair of shorts or bad terminals or connections.
- Replacement of the powertrain control module relay.
- Underhood junction block replacement (fuse box)
- Replacement of battery cables and/or connectors.
- Fuse replacement.
How do I fix code P0690?
What repairs can fix the P0690 code?
- Replacing the ECM/PCM relay.
- Repairing ECM/PCM power wiring.
- Replacing ECM/PCM fuses.
- Replacing damaged battery cables.
- Replacing the ECM/PCM.
How do you test an ECM relay?
Zitat von Youtube: Line you know going to one of the other terminals. On let me see they are 85 and 86. Then i'm going to send 12 volts to 87. And i'm gonna check if the ground 287 is working.
What are the symptoms of a bad PCM relay?
7 Common PCM Failure Symptoms
- Your ‘Check Engine’ Light is On. …
- Your Car Won’t Start or Starts Roughly. …
- Sudden Loss of Gas Mileage. …
- You Failed Your Emissions Test. …
- Your Engine Stutters or Stalls. …
- Erratic or Random Shifting. …
- You’re Receiving a PCM-Related Error Code. …
- What to Do If You Experience PCM Failure Symptoms.
How do I know if I need to replace my PCM?
What Are the Symptoms of a Faulty PCM?
- Your “check engine” light is on.
- Other warning lights may be on, including traction control and ABS.
- You lose fuel economy for no apparent reason.
- Your car stutters when starting, requires multiple attempts, or won’t start at all.
- Stuttering or stalling during idling.