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Very long response Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Wed, 13 Oct 2004 05:50:00
In Reply to: Gas Pedal Potentiometer Test., Neil, Tue, 12 Oct 2004 20:36:02 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I've just clipped this out of a TCS manual. Sorry for the difficulty in reading it.
It assumes you have an ISAT, but if you don't, you can still do the potentiometer tests with a volt/ohm meter. You've just got to dig through it.
Fault Codes 2/45241, 2/45243, 2/45251, 2/45253 & 2/45291
(Pedal Potentiometer Signal Faulty Or Missing)
1) Connect ISAT to Black diagnostic connector located under
front passenger’s seat. Ensure ignition is off. Enter ISAT command
Code 27A. ISAT reply should be about 80010 with accelerator at idle
and about 80070 with accelerator fully depressed.
2) Ensure ignition is off and disconnect ETS ECU. Check
resistance between ETS ECU connector terminals No. 2 (Yellow/Red wire)
and No. 4 (Yellow wire). Resistance should be 900-1200 ohms. Check
resistance between ETS ECU connector terminals No. 4 (Yellow wire) and
No. 17 (Yellow/Green wire). Resistance should be 5-50 ohms at idle,
and 900-1200 ohms with accelerator pedal fully depressed.
3) Measure resistance between ETS ECU connector terminals No.
2 (Yellow/Red wire) and No. 17 (Yellow/Green wire). Resistance should
be 900-1200 ohms at idle, and 5-50 ohms with pedal fully depressed. If
resistances are within specification, go to step 7). If resistances
are not within specification, go to next step.
4) Turn ignition off. Disconnect pedal potentiometer
connector. Check resistance between pedal potentiometer terminals No.
3 (Yellow wire) and No. 4 (Yellow/Red wire). Resistance should be 900-
1200 ohms. Check resistance between pedal potentiometer terminals No.
3 (Yellow wire) and No. 2 (Yellow/Green wire). Resistance should be 5-
50 ohms with accelerator pedal at idle, and 900-1200 ohms with
accelerator pedal fully depressed.
5) Check resistance between pedal potentiometer terminals No.
4 (Yellow/Red wire) and No. 2 (Yellow/Green wire). Resistance should
be 900-1200 ohms with accelerator pedal at idle, and 5-50 ohms with
pedal fully depressed. If resistances are not to specification,
replace pedal potentiometer.
6) If resistances were incorrect in steps 2) and 3), but
within specification in steps 5) and 6), check wiring and repair as
necessary. If resistances were correct in all steps, go to next step.
7) Reconnect all components. Turn ignition on. Check voltage
signal at ETS ECU connector terminal No. 2 (Yellow/Red wire). Voltage
should be about 5 volts. Check voltage signal at ETS ECU connector
terminal No. 4 (Yellow wire). Voltage should be about .1-.2 volts.
Check voltage signal at ETS ECU terminal No. 17 (Green/Yellow wire).
About .1 volts should be present when accelerator is at idle, and
increase to about 4 volts when accelerator is depressed to full
throttle. If voltages are not as specified, replace ETS ECU.
Fault Codes 2/45244, 2/45245, 2/45254 & 2/45255 (KDW
Potentiometer Signal Incorrect)
1) Turn ignition off. Disconnect ASR ECU connector. Check
resistance between ASR ECU terminals No. 11 (Yellow/Red wire) and No.
15 (Red wire). Resistance should be 900-1100 ohms.
2) Check resistance between ASR ECU terminals No. 11
(Yellow/Red wire) and No. 22 (Blue/Red wire). About 5-100 ohms should
be present with throttle at idle position (KDW fully retracted). About
900-1100 ohms should be present with throttle fully depressed (KDW
fully extended).
3) Measure resistance between ASR ECU terminals No. 22
(Blue/Red wire) and 15 (Red wire). About 900-1100 ohms should be
present with throttle at idle position (KDW fully retracted). About 5-
100 ohms should be present with throttle fully depressed (KDW fully
extended). If resistances are to specification, go to step 6). If
resistances are not to specification, go to next step.
4) Ensure ignition is off. Disconnect potentiometer
connector. Measure resistance between potentiometer terminals No. 2
(Yellow/Red wire) and No. 6 (Red wire). About 900-1100 ohms should be
present. Measure resistance between potentiometer terminals No. 2
(Yellow/Red wire) and No. 5 (Blue/Red wire). About 5-100 ohms should
be present with throttle at idle (KDW fully retracted). About 900-1100
ohms should be present with throttle fully depressed (KDW fully
extended).
5) Measure resistance between potentiometer terminals No. 5
(Blue/Red wire) and No. 6 (Red wire). About 900-1100 ohms should be
present with throttle at idle (KDW fully retracted). About 5-100 ohms
should be present with throttle fully depressed (KDW fully extended).
If resistances are not to specification, replace KDW
motor/potentiometer assembly. If resistances were incorrect in steps
1) through 3), but were within specification in steps 4) and 5), check
and repair wiring as necessary.
6) If all resistances were with specification, reconnect all
components. Turn ignition on. Check voltage at ASR ECU connector
terminal No. 11 (Yellow/Red wire). About 4.5-5.0 volts should be
present. If voltage is not 4.5-5.0 volts, check Yellow/Red wire
between potentiometer connector and ASR ECU terminal No. 11
(Yellow/Red wire) for an open circuit or short to ground.
7) Ensure there is a good ground at ASR ECU terminal No. 15
(Red wire) by checking voltage at ASR ECU terminal No. 15 (Red wire)
with all components connected and ignition on. About .1-.2 volts
should be present. If voltage is not .1-.2 volts, check Red wire
between potentiometer connector and ASR ECU terminal No. 15 for an
open circuit or short to ground.
8) Check potentiometer output signal at ASR ECU terminal No.
22 (Blue/Red wire) with all components connected and ignition on. KDW
motor should be in fixed position about halfway through its travel.
About 2.5 volts should be present. If voltage is not to specification,
check Blue/Red wire between potentiometer connector and ASR ECU
terminal No. 22 for an open circuit or short to ground. If wiring is
okay and code persists, replace ASR ECU.
Fault Codes 2/45292 (Deviation In Signals Between Throttle
Potentiometer & Pedal Potentiometer)
1) If TCS CTRL light is on and system is in limp home mode,
check for fault Codes 25240, 25241, 25242, 25243, 25250, 25251, 25252,
25253, 25290, 25291, 45240, 45241, 45242, 45243, 45250, 45251, 45252,
45253, 45290, and 45291 from ETS system. If any fault codes are
present, perform test procedures for these codes first. If other codes
are not present, go to next step.
2) Ensure all components are connected. Turn ignition on.
Check voltage signals by backprobing at ASR ECU connector. See FAULT
CODE 2/45292 VOLTAGE SPECIFICATIONS table.
FAULT CODE 2/45292 VOLTAGE SPECIFICATIONS TABLE
Terminal No. (Wire Color) Approximate Voltage
1 (Gray/Green) .............................................. ( 1) .1
3 (Blue/White) ............................................... ( 2) 4
7 (Yellow/Red) ................................................... 5
20 (Yellow/White) ................................................ 5
(1) - Specification is for accelerator at idle position. About 4 volts
should be present at full throttle.
(2) - Specification is for accelerator at idle position. About .1 volt
should be present at full throttle.
posted by 192.249....
, Wed, 13 Oct 2004 05:50:00 <-- Viewing This Message
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