Hi guys!
Does anyone know where the wiring harness for the A442F ECU is grounded?
Does anyone know the correct way to measure inspect the voltages of the trans ECU?
So I have what seems like solenoid trouble. I am following the troubleshooting guide in the tech manual (this seemed like a good idea). And I get stuck on STEP 1: Read diagnostic code.
I jumped the OBD port as shown in the tech manual - nothing. The OD OFF light is supposed to blink steady if everything is ok and blink a code it has one. Nothing. The ECU must not have power, I think.
So I find the section on the ECU and start checking the terminals as shown below.
With the ignition switch in the ON position:
This leads me to believe there is a problem with the ground of the harness - or I just have completely no idea how to measure this stuff correctly (which is also true).
So this leads to my questions:
Does anyone know where the wiring harness for the A442F ECU is grounded?
Does anyone know the correct way to measure inspect the voltages of the trans ECU?
Thanks in advance!
Does anyone know where the wiring harness for the A442F ECU is grounded?
Does anyone know the correct way to measure inspect the voltages of the trans ECU?
So I have what seems like solenoid trouble. I am following the troubleshooting guide in the tech manual (this seemed like a good idea). And I get stuck on STEP 1: Read diagnostic code.
I jumped the OBD port as shown in the tech manual - nothing. The OD OFF light is supposed to blink steady if everything is ok and blink a code it has one. Nothing. The ECU must not have power, I think.
So I find the section on the ECU and start checking the terminals as shown below.
With the ignition switch in the ON position:
- I get nothing anywhere, so I measure across PWR to GND on the plugs - nothing.
- I got a weak response from the brake pedal pin (approximately 0.5V off and 0.8V on).
- I got no continuity between the ground pin on the plug and the body so I'm not sure if it is related.
- I observed no change with the engine running or not.
This leads me to believe there is a problem with the ground of the harness - or I just have completely no idea how to measure this stuff correctly (which is also true).
So this leads to my questions:
Does anyone know where the wiring harness for the A442F ECU is grounded?
Does anyone know the correct way to measure inspect the voltages of the trans ECU?
Thanks in advance!