Maxima Forums - View Single Post - CHECK ENGINE LIGHT Diagnosis (If "trouble" lights are on, read here first!)

**Kevlo911** · 07-25-2003, 11:25 AM

0903
Diagnostic Trouble Code 0903 indicates a problem with the Evaporative Emission (EVAP) Canister Vent Control Valve or its associated electric circuit.

This part is used by the Engine Control Module to perform the fuel system leak test. Since it is used only for self-diagnosis your engine will run perfectly well despite the dashboard Malfunction Indicator Lamp.

The EVAP canister and this valve are located under the car, near the rear left tire. You might check to make sure all the electrical connectors in that area are secure.

There's no telling how expensive the repair will be, because no definite diagnosis has been made. Maybe you just have to re-plug a loose connector. Since the EVAP system is part of the emissions control system you might have warranty coverage.

0904
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0905
Crank Shaft Sensor Bad NEED HELP ASAP

0908
help... MIL light codes.. thanks.

1001
How to fix Ecu Code 1001 ?

1003
Can you help Daniel B Martin????

1005
1005 is EGRC Solenoid valve

The majority of my information about Diagnostic Trouble Codes comes from my '99 Maxima factory service manual. Unfortunately, DTC 1005 is not in that book. Starting in '99 the Maxima engine uses a step-motor type of EGR valve and with that change, the DTCs changed.
The Chilton and Haynes manuals provide a little information about the EGR Solenoid Valve.
The test procedure for this part is found in the Chilton repair manual (page 4-11) and the Haynes repair manual (page 6-20). Test the valve and replace if necessary.

This malfunction is not an emergency but should be resolved fairly soon (7-10 days). An inoperative EGR valve may result in engine pinging and a variety of driveability complaints.

1008
The Evaporative Emission (EVAP) Canister Purge Volume Control Solenoid Valve uses an on/off duty cycle to control the flow of fuel vapor from the EVAP canister. Diagnostic Trouble Code 1008 is set when the Engine Control Module (the computer) detects an improper signal through the valve. The problem is likely to be in the electrical wiring, harness, or the valve itself.

Check fuse #58 (10 amps) and replace if necessary.

The CPVCSV is easy to see and reach. It is located in the engine compartment, mounted to the top of the upper intake manifold. Notice the Vehicle Serial number stamped into the firewall. Put your finger on the third-from-last number. Move your finger three inches toward the radiator. That's the CPVCSV. It has one two-wire electrical connector and two vacuum hoses. It is directly above the ignition coil connector for cylinder #5 and has to be removed in order to replace the #5 coil or spark plug.

You may test the valve. This test procedure is performed with the engine off. Remove the electrical connector and both vacuum hoses. Fasten a length of clean rubber vacuum tubing to either nipple. Gently blow through the hose. The valve should be closed and it should be difficult or impossible to send air through the valve. Now use a pair of fused test leads to provide 12 volts to the electric terminals. The polarity doesn't matter. With the solenoid energized the valve should be open and it should be easy to send air through the valve.
http://www.jcn.net/mwest/evappage.htm

1101
Check engine light, ECU code 11:1

1102
Revolution sensor location

1103 1104 1105 1106
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.

1107
Diagnostic Trouble Code P0744(1107) indicates a problem with the Solenoid Valve Lock-up Function. This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter clutch does not lock up as instructed by the Transmission Control Module. The electric circuit is good but the A/T failed to lock up. Possbile causes include...
- Torque converter clutch solenoid valve
- Each clutch
- Hydraulic control circuit.

DTC P0744 is entirely consistent with P0734. It's no surprise to find both codes set. They are both warning of the same problem, so whatever fixes one will most likely fix the other.

1108
auto tranny question

1201
http://forums.maxima.org/search.php?...der=descending

1203
http://forums.maxima.org/search.php?...der=descending

1204
should I buy?

1205
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1206
Diagnostic Trouble Code 1206 points to a problem with the TPS.

The Throttle Position Sensor detects the throttle valve position and sends a signal to the Transmission Control Module.

The Throttle Position Switch consists of a Wide Open Throttle position switch and a closed throttle position switch. The WOT switch sends a signal to the TCM when the throttle is open at least 1/2 of the WOT position. The closed throttle position switch sends a signal to the TCM when the throttle is fully closed.

The Sensor and Switch are integrated into one unit designated TPS.

This malfunction may be detected when the TCM receives an excessively low or high voltage from the sensor.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor
- faulty Throttle Position Switch

1207
http://forums.maxima.org/search.php?...der=descending

1208
http://forums.maxima.org/search.php?...der=descending

1302
MAP/BARO SW Solenoid/Valve

1305
Fuel Pump Control Module

1308
Cooling Fan

All searching has been done by KevLo911

07-25-2003, 11:25 AM	#5
Kevlo911 You can't friend yourself Join Date: Dec 2000 Location: DeFuniak and Gainesville, FL iTrader: (33) Posts: 16,456	0903 Diagnostic Trouble Code 0903 indicates a problem with the Evaporative Emission (EVAP) Canister Vent Control Valve or its associated electric circuit. This part is used by the Engine Control Module to perform the fuel system leak test. Since it is used only for self-diagnosis your engine will run perfectly well despite the dashboard Malfunction Indicator Lamp. The EVAP canister and this valve are located under the car, near the rear left tire. You might check to make sure all the electrical connectors in that area are secure. There's no telling how expensive the repair will be, because no definite diagnosis has been made. Maybe you just have to re-plug a loose connector. Since the EVAP system is part of the emissions control system you might have warranty coverage. 0904 http://forums.maxima.org/search.php?...der=descending 0905 Crank Shaft Sensor Bad NEED HELP ASAP 0908 help... MIL light codes.. thanks. 1001 How to fix Ecu Code 1001 ? 1003 Can you help Daniel B Martin???? 1005 1005 is EGRC Solenoid valve The majority of my information about Diagnostic Trouble Codes comes from my '99 Maxima factory service manual. Unfortunately, DTC 1005 is not in that book. Starting in '99 the Maxima engine uses a step-motor type of EGR valve and with that change, the DTCs changed. The Chilton and Haynes manuals provide a little information about the EGR Solenoid Valve. The test procedure for this part is found in the Chilton repair manual (page 4-11) and the Haynes repair manual (page 6-20). Test the valve and replace if necessary. This malfunction is not an emergency but should be resolved fairly soon (7-10 days). An inoperative EGR valve may result in engine pinging and a variety of driveability complaints. 1008 The Evaporative Emission (EVAP) Canister Purge Volume Control Solenoid Valve uses an on/off duty cycle to control the flow of fuel vapor from the EVAP canister. Diagnostic Trouble Code 1008 is set when the Engine Control Module (the computer) detects an improper signal through the valve. The problem is likely to be in the electrical wiring, harness, or the valve itself. Check fuse #58 (10 amps) and replace if necessary. The CPVCSV is easy to see and reach. It is located in the engine compartment, mounted to the top of the upper intake manifold. Notice the Vehicle Serial number stamped into the firewall. Put your finger on the third-from-last number. Move your finger three inches toward the radiator. That's the CPVCSV. It has one two-wire electrical connector and two vacuum hoses. It is directly above the ignition coil connector for cylinder #5 and has to be removed in order to replace the #5 coil or spark plug. You may test the valve. This test procedure is performed with the engine off. Remove the electrical connector and both vacuum hoses. Fasten a length of clean rubber vacuum tubing to either nipple. Gently blow through the hose. The valve should be closed and it should be difficult or impossible to send air through the valve. Now use a pair of fused test leads to provide 12 volts to the electric terminals. The polarity doesn't matter. With the solenoid energized the valve should be open and it should be easy to send air through the valve. http://www.jcn.net/mwest/evappage.htm 1101 Check engine light, ECU code 11:1 1102 Revolution sensor location 1103 1104 1105 1106 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. 1107 Diagnostic Trouble Code P0744(1107) indicates a problem with the Solenoid Valve Lock-up Function. This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter clutch does not lock up as instructed by the Transmission Control Module. The electric circuit is good but the A/T failed to lock up. Possbile causes include... - Torque converter clutch solenoid valve - Each clutch - Hydraulic control circuit. DTC P0744 is entirely consistent with P0734. It's no surprise to find both codes set. They are both warning of the same problem, so whatever fixes one will most likely fix the other. 1108 auto tranny question 1201 http://forums.maxima.org/search.php?...der=descending 1203 http://forums.maxima.org/search.php?...der=descending 1204 should I buy? 1205 http://forums.maxima.org/search.php?...der=descending 1206 Diagnostic Trouble Code 1206 points to a problem with the TPS. The Throttle Position Sensor detects the throttle valve position and sends a signal to the Transmission Control Module. The Throttle Position Switch consists of a Wide Open Throttle position switch and a closed throttle position switch. The WOT switch sends a signal to the TCM when the throttle is open at least 1/2 of the WOT position. The closed throttle position switch sends a signal to the TCM when the throttle is fully closed. The Sensor and Switch are integrated into one unit designated TPS. This malfunction may be detected when the TCM receives an excessively low or high voltage from the sensor. Possible causes include ... - Harness or connectors (the throttle position sensor is open or shorted.) - faulty Throttle Position Sensor - faulty Throttle Position Switch 1207 http://forums.maxima.org/search.php?...der=descending 1208 http://forums.maxima.org/search.php?...der=descending 1302 MAP/BARO SW Solenoid/Valve 1305 Fuel Pump Control Module 1308 Cooling Fan All searching has been done by KevLo911 __________________ 97 Pearl White Max GLE I has car LED tails for sale for 97-99 as well: http://forums.maxima.org/4th-generat...-interest.html