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Thanks for all the advice. I was able to pull the codes today:
P2122 Throttle/Pedal Position Sensor? Switch D circuit Low
P2127 Throttle/Pedal Position Sensor? Switch E circuit Low
That would explain why I couldnt get the codes manually.
The shop manual says not to remove sensor but I guess at this point I have nothing to lose? I just hope I can do the relearn.
Well I replaced the pedal sensor without any resulting changes. So I guess now I have to check the ground connection or the connection to the ECU. I am right the connections from the pedal go to the ECU? What would be the best way to go about doing this? Can I check with a voltmeter at the connection to the ECU?
Thanks! I have been busy with work so left it for a bit. Fortunately I can walk to work. Anyways I read the service manual and made myself some notes highlighting what I don't know. Oddly my power door locks are not working now...maybe I knocked a harness off? Anyways if anyone can ritique my thinking below will be greatly appreciated.
I did the relearn procedure without success which would make sense if the wiring is broken.
According to EC-413 the first diagnostic procedure is to check the ground connections following the instructions in EC-132.
EC-413 also shows three diagrams locating the relevant grounds of:
M27, M70 and F49.
Also in section PG:
PG-16 shows M27
PG-18 shows M70
PG-24 shows F49
I see now where the locations of M70 and M27 are and started to remove some panels. It looks like I have to remove the instrument panel. I started to remove it and it detached at the back but the front part won’t budge.
As for F49 called body ground in EC-413 and engine ground in PG-24 I cannot see it where I think it should be ... the left side kick panel?
Step 2 is: CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
Check voltage between APP sensor terminal 6 and ground with tester. This I can do just need to find my voltmeter….it should be 5V….if it is go to step 3 otherwise repair circuit.
Step 3: CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
Check harness continuity between APP sensor terminal 3 and ECM terminal 82.
Refer to Wiring Diagram…. I can do this.
Also check harness for short to ground and short to power. Not sure how to do this?
4. CHECK APP SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
Check harness continuity between APP sensor terminal 5 and ECM terminal 106.
Refer to Wiring Diagram….I can do this.
Also check harness for short to ground and short to power….not sure again.
So basically I am checking the wires from the sensor harness to the ecm are continuous.
The last step would be to check would be to connect the harness and with ignition on (engine on?) check that I get the varying voltages depending on the pedal position according to EC-417, EC-418.
For example it says:
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
I am a little confused here. I put one lead on the body ground and the other on the ecm terminal, but how if all harnesses are connected?
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