Question about Caterpillar Backhoe Tractor

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97 Cat 426C IT ser# 1MR00292 Has rear wheel steer also. I was digging in bank - easy material - put in reverse, (transmission in first) and machine would not move. Tried forward and still no go. Went neutral - shut machine off - would not re-start. No noise to starter though alarm and indicator lights come on. Machine was on a bit of a side grade, but not bad. Transmission was a bit low on oil, but still registered on stick. Removed starter and checked but all seems well, though it doesn't spin when power is applied to terminals. Bendix does slide out to engagement position okay, and no apparent damage, or previous starting problems. Removed floor cover plate and checked for obvious loose or broken wires. Checked fuses and relays but all seem okay. Checked forward - reverse lever connections. Where is the neutral safety switch located, and could this have failed suddenly? Charged batteries up full - lots of power. Tried jumping starter but it does nothing. (hot wire) Have no idea of wiring diagram, but am experienced in mechanics and equipment. Any ideas?

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  • Kirby Aug 28, 2010

    Well, I do agree that a wiring diagram would be helpful, the urls that you have provided are somewhat questionable. The 02EPC url is rather difficult to navigate as it does not tell how you are supposed to add one of the other loader manuals, (the 426C BACKHOE LOADER 1MR ) to the CART for purchase. How can a business site in Europe guarantee delivery of the product, and what are you supposed to do if they don't deliver, after taking your money? Some companies from this country have a very bad track record. Not saying this is one of them, but what if?? There would be no realistic method of having my payment of $200.00 returned.

    I was hoping that someone could direct me to an available source in North America where I could purchase the manual for my specific machine, or failing that someone who was familiar enough with this model to tell me where the safety switches were located.

    Any further information on this?

    Here is the trace for the O2EPC site:

    O2EPC.COM - Whois Information



    =-=-=-=
    Visit AboutUs.org for more information about o2epc.com
    AboutUs: o2epc.com

    Registration Service Provided By: Internet and Software Limited
    Contact: info@issltd.biz

    Domain name: o2epc.com

    Registrant Contact:

    Ivan Ivanov ()

    Fax:
    russkaya, 100
    simferopol,, 95044
    UA

    Administrative Contact:

    Ivan Ivanov (partsrepairmanualscatalogues@gmail.com)
    80679223584
    Fax:
    russkaya, 100
    simferopol,, 95044
    UA

    Technical Contact:

    Ivan Ivanov (partsrepairmanualscatalogues@gmail.com)
    80679223584
    Fax:
    russkaya, 100
    simferopol,, 95044
    UA

    Status: Locked

    Name Servers:
    master.hostsila.com
    slave.hostsila.net

    Creation date: 14 Apr 2009 17:08:08
    Expiration date: 14 Apr 2011 17:08:08


  • Kirby Aug 28, 2010

    Yes, you're right insofar as there is a neutral safety switch in line, somewhere, that is making the machine think like it is in reverse whereas it is in neutral. Thus, the starter is not receiving the electrical current that will allow it to work. Having it all apart now, I see all manner of switches, solenoids, and relays of one type or another. We have attempted to check them, and the wiring for any evident faults, but have no idea which particular switch operates this neutral safety relay, and what item has failed that makes the system act like the machine is still in gear. This is a fault of design and over - complication of what should have been a user friendly system. The shop manual, or a caterpillar technician who will charge many dollars to trace it down seems like the only solution. I was hoping to find someone with a similar machine who could email me a wiring diagram, or was familiar with the system.

    Thanks for your advice and assistance.

  • Kirby Aug 29, 2010

    All of the advice given was helpful, but due to the rather intricate nature of the machine wiring, it was a tough problem to resolve. Expert knowledge of the unit proved beneficial. Thanks for your speedy replies and assistance.

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Take an ohm meter to the ignitions wiring tro check for a short. a fuseable link may be inside of one wire especially to the starters solenoid. All cars have these links to protect the wiring from fires starting

Posted on Aug 28, 2010

  • frank thomas wilson
    frank thomas wilson Aug 28, 2010

    follow the wiring from the electrical ignition key switch

    one is to the battery

    one to the starter relay

    the others run to accessory circuits which have no faults in starting the engine

    ohm out the ones needed and trace the short

  • frank thomas wilson
    frank thomas wilson Aug 28, 2010

    check by the clutch pedal for a switch?

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Hi,

I see that you have tried all the possible troubleshooting steps that is required to try starting it. Yes at this point of time you can refer to the bellow mentioned link which would give you a diagram for the same. Since you said you are a techy guy please follow the diagram.

http://www.o2epc.com/Caterpillar-BACKHOE-LOADER-Service-Workshop-Manuals-2009-service-manual-Workshop-repair.html

or

http://backhoesonline.info/caterpillar-backhoe-diagrams/

Let us know if you have something more to ask else please accept the solution.
Thanks for contacting fixya.com

Posted on Aug 27, 2010

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I have 99 bmw 323i.i ran it hot and got prob fixed and now the eml and a triangle with circle around it comes on dash and car has no power.feels like it has a rev limiter.wats wrong with my car


have throttle body checked also the MDK throttle motor,
make sure that the dealer has followed service bulletin 12 07 99 for procedure to replace the MDK throttle motor
also have them check for codes,here are some codes,
it could be an expensive job,have them check everything,it is most likely the throttle motor,,throttle body is 600 if they switch it,dont let them do it without checking throttle motor,
codes,
MS41, MS42 and MS43 engine DME bmw codes...
• 1 Ignition coil Cyl 2
• 2 Ignition coil Cyl 4
• 3 Ignition coil Cyl 6
• 5 Fuel injector Cyl 2
• 6 Fuel injector Cyl 1
• 8 Air Flow Meter (HFM)
• 10 Coolant Temperature Sensor
• 11 Tank Pressure Sensor (EVAP System) or Radiator Outlet Temp (MS43)
• 12 TPS or Plausibility - Maximum Coolant Temp (MS43)
• 13 Plausibility- Radiator Outlet Temp
• 14 Intake Air Temperature Sensor
• 15 Plausibility - Cut Out Time
• 16 AirCon Compressor - PWM Signal or Plausibility Intake Air Temp (MS43)
• 17 Plausibility - Engine Coolant Temp
• 18 EWS Signal or Camshaft Sensor (MS43)
• 19 Activation VANOS Inlet Valve or Exhaust Valve (MS43)
• 20 "CHECK ENGINE" Light Failure
• 21 VANOS -Electrical Fault or Activation VANOS Inlet Valve (MS43)
• 22 Fuel Injector Cyl 3
• 23 Fuel Injector Cyl 6
• 24 Fuel Injector Cyl 4
• 25 Lambda Sensor Heater -Bank 1
• 27 Idle Control Valve - Malfunction
• 29 Ignition Coil Cyl 1
• 30 Ignition Coil Cyl 3
• 31 Ignition Coil Cyl 5
• 33 Fuel Injector Cyl 5
• 35 Aux. Air Injection System Relay
• 36 DME Main Relay
• 37 DME Main Relay : Delay
• 38 Clutch Switch -Plausibility
• 39 Brake Light Switch or Brake Light Test Switch
• 40 Brake Light Switch or Pedal Value Signal
• 42 Multi Function Steering Wheel- Plausibility
• 43 Multi Function Steering Wheel: Button
• 45 Multi Function Steering Wheel: Port
• 47 Temp Sensor -Downstream of Pre-Cat or Torque Limitation Level 1 (MS43)
• 48 DME Control Unit -Self Test 1
• 49 DME Control Unit or Torque Monitoring Level 2 (MS43)
• 50 EVAP Control Valve or Response Monitoring Level 2 (MS43)
• 51 Shut-off Valve -Charcoal Filter or Request Control Unit Reset (MS43)
• 52 Solenoid Valve -Exhaust Flap
• 53 Idle Speed Actuator
• 55 Lambda Sensor Heater -Bank 2
• 56 Ignition Current Feedback Resistor - Open Circuit
• 57 Knock sensor -Bank 1
• 58 DME Control Unit -Self Test 2
• 59 Knock Sensor -Bank 2
• 61 Lambda Sensor Heater -Bank 2 Post Cat
• 62 Aux. Air Injection System -Switching Valve
• 63 DME Control Unit or Ambient Temp Signal via CAN (MS43)
• 64 Plausibility - Ambient Temperature
• 65 Camshaft Position Sensor (Inlet MS43)
• 66 DME Control Unit
• 67 DME Control Unit
• 68 Tank Venting Valve
• 69 Fuel Pump Relay
• 70 DME Control Unit
• 71 DME Control Unit
• 72 DME Control Unit
• 74 AirCon Compressor Relay
• 75 Lambda Sensor Voltage -Bank 1
• 76 Lambda Sensor Voltage -Bank 2
• 77 Lambda Sensor Voltage -Bank 1 Post Cat
• 78 Lambda Sensor Voltage -Bank 2 Post Cat
• 79 Lambda Sensor Heater -Bank 1 Post Cat
• 80 ABS/ASC interface
• 81 MSR Signal -Active too Long
• 82 ABS/ASC Interface -Advance Adjustment
• 83 Crankshaft Sensor
• 90 Exhaust Temperature Pre Cat Conv - Bank 1
• 91 Exhaust Temperature Pre Cat Conv - Bank 2
• 92 Exhaust Temperature Post Cat Conv -Bank 1
• 93 Exhaust Temperature Post Cat Conv -Bank 2
• 94 Auxiliary Air -Air Mass Flow Sensor
• 95 Auxiliary Air Valve or Auxiliary Air Hose Blocked
• 96 Auxiliary Air Pump - Function
• 97 Auxiliary Air -Flow Rate too Low
• 98 Auxiliary Air -Flow Rate too High
• 99 Auxiliary Air Valve Jammed Open
• 100 DME Control Unit -Self-Test Failed
• 103 VANOS Error -Inlet Camshaft
• 104 VANOS Error -Exhaust Camshaft
• 105 VANOS Error -Position Inlet Camshaft
• 106 VANOS Error -Position Exhaust Camshaft
• 109 Throttle Valve Plausibility
• 110 Pedal Sensor Value Potentiometer 1
• 111 Pedal Sensor Value Potentiometer 2
• 112 TPS Potentiometer 1
• 113 TPS Potentiometer 2
• 114 Throttle Valve Final Stage
• 115 Reference Voltage -Voltage Regulator 1 or Throttle Pedal Adaptation (MS43)
• 116 Reference Voltage -Voltage Regulator 2
• 117 Plausibility -Pedal Position Sensor 1/2
• 118 Plausibility -TPS 1/2 or TPS1/Airflow Plausibility (MS43)
• 119 Throttle Valve Sensor -Mechanical Error or TPS2/Airflow Plausibility (MS43)
• 120 Plausibility Pedal Sensor or TPS
• 122 Engine Oil Temperature
• 123 Map Cooling Thermostat Control
• 124 Activation DISA Solenoid
• 125 Activation Electric Fan
• 126 Activation Tank Leak Pump Solenoid
• 127 Activation Pump Solenoid
• 128 DME/EWS Communication
• 129 CAN Signal SMG 1
• 130 CAN Signal ASC -Timeout
• 131 CAN Signal Instrument Cluster -Timeout
• 132 CAN Signal Instrument Cluster -Timeout
• 133 CAN Signal ASC -Timeout
• 134 SMG Intervention -Plausibility
• 135 Throttle Valve Re-Adaptation Required
• 136 Throttle Valve -Spring Test and Limp-home Position Failed
• 137 CAN Signal -Steering Angle Sensor
• 139 CAN Signal -Tank Level Sensor
• 140 Tank Leak Pump Solenoid - Reed Switch Open or Output Stage (MS43)
• 141 Tank Leak Pump Solenoid - Reed Switch Stuck Closed or Tank Level Sensor (MS43)
• 142 Tank Leak Pump Solenoid - Reed Switch Stuck Open or DMTL Module (MS43)
• 143 Tank Ventilation or Tank Leakage (MS43)
• 144 Fuel System - Large Leak Recognised
• 145 Fuel System - Small Leak Recognised
• 146 EVAP System Leak Detected (Small Leak) or Pedal Sensor Supply Voltage Pot 1 (MS43)
• 147 Pedal Position Sensor Potentiometer Supply Channel 1 (Pot 2 MS43)
• 149 Air Flow Sensor or Pedal Value Sensor Mismatch
• 150 Lambda Post Cat Bank 1 Max Limit
• 151 Lambda Post Cat Bank 2 Max Limit
• 152 Lambda Post Cat Bank 1 Min Limit
• 153 Lambda Pre Cat Bank 2 Max Limit
• 154 Lambda Pre Cat Bank 2 Min Limit
• 155 Lambda Pre Cat Bank 2 No Signal
• 156 Lambda Pre Cat Bank 1 No Signal
• 157 Lambda Post Cat Bank 1 Min Limit
• 159 Lambda Post Cat Bank 2 Max Limit
• 160 Lambda Post Cat Bank 2 (MS41) or Throttle Valve Stuck
• 161 Throttle Valve - Stuck
• 162 Throttle Valve -Control Deviation
• 168 Pedal Position Sensor Pot Supply 1 or MAP Cooling Thermostat Jammed (MS43)
• 169 Throttle Valve Output Stage Cut off after Fault
• 170 DME Control Unit -Self Test Failed
• 171 Plausibility - Throttle Valve
• 172 Pedal Sensor Potentiometer 1/2 Short Circuit
• 173 TPS Potentiometer 1/2 Short Circuit
• 174 Throttle Valve Potentiometer 1/2 Adaptation
• 175 Pedal Sensor 1 Adaptation
• 176 Pedal Sensor 2 Adaptation
• 186 Voltage Post Cat Bank 1
• 187 Voltage Post Cat Bank 2
• 188 Voltage Pre Cat Bank 1
• 189 Voltage Pre Cat Bank 2
• 190 EVAP -Reed Switch Open or Voltage Post Cat Bank 1 (MS43)
• 191 EVAP -Reed Switch Closed or Voltage Post Cat Bank 2 (MS43)
• 192 EVAP -Reed Switch Open
• 193 EVAP -Check Hoses
• 194 EVAP -Large Leak Detected
• 195 EVAP -Small Leak Detected
• 196 EVAP -Electrical Valve from LDP Pump or Barometric Pressure Sensor (MS43)
• 197 EVAP -Barometric Pressure Sensor
• 198 Cat Efficiency during Start -Bank 1
• 199 Cat Efficiency during Start -Bank 2
• 200 Lambda Regulation Bank 1 Pre Cat
• 201 Lambda Regulation Bank 2 Pre Cat
• 202 Lambda Regulation Bank 1 Post Cat
• 203 Lambda Regulation Bank 2 Post cat
• 204 Idle Control System -Idle speed not plausible
• 208 EWS -RPM Signal Error
• 209 EWS -Message Error
• 210 Ignition Feedback Resistor (ZSR)
• 211 Idle Speed Actuator -Mechanical
• 212 VANOS Bank 1 -Mechanical
• 214 Vehicle Speed Signal (VSS)
• 215 Lambda Sensor Bank 1 or ASC/MSR/EML -Interface not plausible
• 216 Lambda Sensor Bank 2 or EGS Position Signal
• 217 CAN bus error -EGS Signal not present
• 218 CAN module -Warning
• 219 CAN module -CAN Offline
• 220 Lambda Voltage Range Bank 1 Sensor 1
• 221 Lambda Voltage Range Bank 2 Sensor 1
• 222 Low Coolant Temperature or Lambda Sensor Control (MS43)
• 223 Lambda Sensor Switching Bank 1 Sensor 2
• 224 Lambda Sensor Switching Bank 2 Sensor 2
• 225 Cat Efficiency Bank 1
• 226 Cat Efficiency Bank 2
• 227 Mixture Deviation Bank 1
• 228 Mixture Deviation Bank 2
• 229 Lambda Sensor Switching Bank 1
• 230 Lambda Sensor Switching Bank 2
• 231 Lambda Sensor Switching Bank 1 Pre Cat
• 232 Lambda Sensor Switching Bank 2 Pre Cat
• 233 Catalytic Converter Overall Efficiency Bank 1
• 234 Catalytic Converter Overall Efficiency Bank 2
• 235 Lambda Heater Bank 1 Post Cat or Pre Cat Signal (MS43)
• 236 Lambda Heater Bank 2 Post Cat or Pre Cat Signal (MS43)
• 238 Misfire Cyl 1
• 239 Misfire Cyl 2
• 240 Misfire Cyl 3
• 241 Misfire Cyl 4
• 242 Misfire Cyl 5
• 243 Misfire Cyl 6
• 244 Crankshaft Interval Timing
• 245 Aux Air Injection System Bank 1
• 246 Aux Air Injection System Bank 2
• 247 Aux Air Injection System -Incorrect Flow Detected
• 248 Pre Cat Converter Efficiency -Bank 1
• 249 Pre Cat Converter Efficiency -Bank 2
• 250 Tank Venting Valve -Function
• 251 Tank Ventilation Diagnosis Error
• 252 Tank Ventilation System Vacuum
• 253 Activated Charcoal Filter Shut-off Valve Stuck Shut
• 254 Tank Ventilation System -Large Air Leak
• 255 Tank Ventilation System -Valve Stuck Open

Apr 03, 2015 | 1999 BMW 323i

2 Answers

Code p0159 what is this


159, (USA?) must be V6 or V8 it has 2 banks.
first google hit
Possible causes
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

let me condense this.
1: the right bank rear 02 sensors is reading wrong,
note I did not say it was bad. dig?
2: this means the CAT on that side, is UNHAPPY.

unhappy can be , as it said air leaks anywhere near the front or rear of Bank 2 CAT.
unhappy 2, is the engine fuel controls are totally out of control
way rich or lean, out of control;
unhappy3, gross misfire, or all the above at once.

the ECU(pcm) at no time ever KNOW what is wrong, it only can flag bad inputs. or tests that fail , tests are called (USA,OBD2 SAE) called Monitors.
do you have a full can tool? or just a near useless codereader.
?

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1 Answer

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1 Answer

Transmission kicks in first gear and reverse/drive positions. Why


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I have a 97 gmc sierra 4x4, 5.7 engine. it is throwing a code bank 2 sensor 2. well i have 2 rear sensors, which one is it?


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1 Answer

My 97 Geo metro is slight noise from rear wheel now play in steer


Have the rear wheel bearing checked and check the outer tie rods checked for play.

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2 Answers

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