metallic97gxe

iTrader: (3)

When I got the vbxMaxima site it gives me a javasript error so could someone tell me what these codes mean?

henock

1002 is "Undefined"
1103 is "Improper Shifting to First Gear (A/T)"

bill99gxe

iTrader: (1)

Hard to believe these haven't been covered here more thoroughly, but they have not.

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DTC 1002: Downstream oxygen sensor heater or circuit fault

This code above is also known as P0161 when using a scan tool, which according to this post:

http://forums.maxima.org/showthread....ighlight=P0161

is the Rear heated oxygen sensor heater

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DTC 1103: A/T first gear signal fault

Since DTCs 1103 to 1106 deal with the transmission, there is info on the 1106 DTC. Everywhere you see "4th gear", simply substitute "1st gear".

Diagnostic Trouble Code 1106 means "Automatic Transmission 4th gear malfunction."

This malfunction is detected when the automatic transmission does not shift into fourth gear or the torque converter clutch does not lock up as instructed by the Transmission Control Unit. The factory service manual lists these possible
causes...

- Shift solenoid A
- Shift solenoid B
- Overrun clutch solenoid valve
- Line pressure solenoid valve
- Each clutch
- Hydraulic control circuit
- Torque converter clutch solenoid valve

You can do some troubleshooting without opening the automatic transmission. Find the harnesses which emanate from the transaxle. One of them terminates in a brown plastic connector with eight pins. This is connector F42, located (approximately) above the transaxle case and below the black plastic engine air intake ductwork. With the engine off, disconnect F42. You want to measure the transmission side of F42. Hold the connector such that the plastic latch is at the top. You should now see two rows of four terminals. These are numbered (top row, left to right) 1 - 4, and (bottom row, left to right) 5 - 8. Make resistance measurements between a clean ground and the following terminals:

#1, Shift solenoid B, 20 - 40 ohms.
#2, Shift solenoid A, 20 - 40 ohms.
#3, Overrun clutch solenoid valve, 20 - 40 ohms.
#4, Line pressure solenoid valve, 2.5 - 5 ohms.
#5, Torque converter clutch solenoid valve, 10 - 20 ohms.

There is also a "bench test" procedure for testing these solenoids with a 12 volt supply such as a car battery. However, this requires removal of the shift solenoid valve assembly. I don't know if you want to get involved with that.

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In doing some further research regarding DTC codes 1103, 1104, 1105, and 1106, (which are scan tool codes P0731, P0732, P0733, and P0734), Daniel B. alludes to a possibility with the TPS, the throttle position sensor causing your code to go off.

This procedure is outlined in more thorough detail here:

http://forums.maxima.org/showthread....ighlight=P0731

And some other real good info regarding the "throttle shock" that a lot of us 95 to 99 slushbox owners experience daily that may or may not cause these particular engine codes 1103 - 1106 to go off. I have brought this up in the past:

http://forums.maxima.org/showthread....5&pagenumber=3

A TPS replacement may be worth the $50 or so to see if you can get this particular code to disappear. I'm considering adjusting or replacing mine as well.

bill99gxe

iTrader: (1)

The reason why your search didn't come up with better results for you is most of the "talk" regarding this code was the scan tool number version "Pxxxx" rather than "DTC xxxx" that you can pull up without the scan tool.


Consider purchasing a Haynes Repair Manual from buy.com or amazon.com for the 1993 to 1999 Nissan Maxima. Has some good info in there on ECU stuff that makes it worth the $15 or so....