Hippo
Lord Hippo
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- 53,851
Last weekend I had a look at the poorly Freelander with my Hawkeye. It's an X plate early 2001 Freelander 1 td4 automatic gearbox with 5 doors on about 115k miles. Armed with tea and jammy dodgers so we set to work.
Faults:
When turning the key to position 2 (electrics only) the speedo jumps up to max. The mileage counter counts up by itself, even thought the engine is not running and the Freelander is stationary. During our playing it clocked up another 90 miles while the ignition was on for a total of about 30 minutes.
The engine starts ok but it doesn't drive forwards or backwards in any gear. The dash does NOT display F4 flashing.
Usual rear passenger lock/window fail, and the fish tank in the boot was full.
The main problem is the Freelander doesn't drive forwards or backwards. The engine starts ok every time. The auto lever moves ok, and the LED by the lever reports the correct position PRND421. The dash also reports the correct PRND421, sport when sport mode is selected and 1 or 2 when manually selecting gears. So that proves the barrel connector carrying the lever position signal is ok, and the dash also supports this. When selecting Drive or Reverse the engine doesn't rock or move and you don't hear any difference in sound. So it's as if there's no additional load on the engine when selecting a gear. The engine revs up ok if requested.
Previously it was driving along quite happily when it lost power. The engine was still running but there was no forward or reverse drive. There was no bang, screech, whine or quack, from what the driver said. The speedo fault where it jumps to max miles per hour and counts up the miles by itself even with the engine on or oft, with the Freelander stationary. This started happening a few months prior to the loss of drive.
Previously it's had 2 different diagnostics and neither could talk to the auto gearbox computer. My Hawkeye could talk to it and retrieve/clear codes. Fault codes are as follows:
Auto gearbox computer:
P1605 faulty controller eeprom (rave says: error flag set)
P0734 gear 4 incorrect ratio (rave says: out of range)
P0735 gear 5 incorrect ratio (rave says: out of range)
The auto gearbox codes all clear ok, but P0734 and P0735 come back. The eeprom error doesn't bother me too much as this seems to pop up regular on my Freelander and others too. There's no signs of oil leaks. We didn't check the condition of the gearbox oil as it was late. We didn't check the fluid level.
We didn't open the barrel connectors on the auto gearbox wiring harness as the resistance measurements were ok, and the connectors were tight. In hindsight it would be a good idea to open the connectors just to check there's nothing bad. The collar turn to open them. But to be fair we have tested both of them enough to have faith they're ok. A quick look won't do any harm.
Engine computer DDE4:
P0480 fan short circuit to ground or open load
P0500 vehicle speed signal can speed signal invalid (signal fault)
Code P0480 clears but code P0500 stays. The first time we tried to get into the engine computer we struggled but every time after that it seemed ok. I get this too on mine, random comms errors when using ma Hawkeye. So that doesn't bother me too much. P0500 is the bigger worry as this relates to the vehicle speed sensor causing a fault. The auto gearbox has a vehicle speed sensor inside it but the resistance measurement is within spec. The fact that it states the vehicle speed sensor value is invalid tie's up with the dash display miles per hour jumping to max when the electric or engine is on. We measured the resistance of the vehicle speed sensor and it's within spec.
There has been an issue where the fans don't work. I proved this is not the case as my Hawkeye could tell the fans to switch on and they did, at varying speeds as requested. So that proves the fans work, but doesn't prove the circuit/request to switch the fans on is ok. I assume the engine computer reads the coolant temp sensor and this triggers the fans starting if the coolant is too hot.
The engine computer reads live data ok, like the coolant temp and battery voltage. It's strange to see the vehicle speed is 3km/hour on the Hawkeye (it was stationary) but I don't know if this is the same on another td4 Freelanders. If someone has a Hawkeye and a td4 can you check the vehicle speed in the engine DDE4 live data menu with the ignition turned to position 2, electrics only. My v6 displays 0km/h. We could also control the radiator fans manually to prove they work, from within the engine computer actuator menu on ma hawkeye.
ABS computer MK20:
5E32 BLS electrical fault (brake light switch?)
5D90 front left sensor electrical fault (we measured it and it's open circuit)
5E15 can interface egs timeout
5DA0 front right sensor electrical fault (we measured it and it's open circuit)
5E17 can gear plausibility
When clearing these codes they all go except 5D90 and 5DA0 which refer to the two front abs sensors failing.
These fault code are difficult to trace as they're not standard P codes. The main problem is both front abs sensors are open circuit. The callipers have been changed at some point and we measured the resistance of the abs sensors and they're both open circuit. We also measured one of the rears to prove our theory, and that was about 1100 ohms. The rear prop is already removed so we lifted one rear wheel and turned it whilst watching ma Hawkeyes abs live data option. Speed went fro 1km/hour to 2 or 3. So that's proves the abs computer is reading live data and working to some extent.
Rave says: "...Failures or malfunctions relating to the sensor, and sensor connections, are detected by the SCS ECU. In the event of failure of two or more of the sensors the SCS ECU switches off the system and illuminates the ABS, TC, EBD, and HDC warning lamps.
...
The longitudinal acceleration sensor (sometimes known as G sensor) is mounted in-cab near the centre-line of the vehicle alongside the handbrake lever. It provides additional information to the SCS ECU regarding vehicle motion, to corroborate inputs from the wheel speed sensors. The signal produced by the longitudinal accelerometer is used by the ABS ECU to check the plausibility of the vehicle speed signal. Where the vehicle wheel speed sensors tell the ECU that the vehicle speed is faster than the actual vehicle speed
...
The ABS ECU continually calculates vehicle speed using the inputs from all four ABS sensors. Vehicle speed is used as a reference against which individual wheel speeds are monitored for unacceptable acceleration or deceleration. Vehicle speed is also output to the instrument pack for the speedometer..."
Which makes me wonder if the abs is causing the problems due to two abs sensors failing.
Air bag computer Autoliv AC4:
33 battery voltage fault intermittent
30 open circuit on SRS warning lamp circuit
Both codes delete and we can also see data like the vin and software number etc. So that proves the air bag computer is working.
example resistance check from my Freelander, not the faulty one on this fred= Freelander 1 v6 Jatco Auto Gearbox - Measuring the Solenoid and Sensor Resistances - YouTube
We also checked the resistance of the auto gearbox solenoids and sensors. Although this doesn't tell us if the solenoids are sticking, it does at least tell us the sensors and solenoids aren't open circuit and within spec.
Sensor resistance limits (connector C0932):
Pin 5 - 20 = Vehicle speed sensor (513 to 627 ohms) = 558 ohms
Pin 21 - 20 = Intermediate speed sensor (513 to 627 ohms) = 559 ohms
Pin 24 - 20 = Turbine speed sensor (513 to 627 ohms) = 550 ohms
Pin 39 - 20 = Fluid temperature sensor (ohms dependent on temp) = 4000ohms = 10 degrees approx
Solenoid resistance limits (connector C0932):
Pin 17 is the common for all solenoid measurements.
Pin 3 - 17 = 2-4 brake duty solenoid valve (2.6 to 3.2 ohms) = 3.4 ohms
Pin 4 - 17 = 2-4 brake timing solenoid valve (14 to 18 ohms) = 16.7 ohms
Pin 10 - 17 = Reduction timing solenoid valve (14 to 18 ohms) = 17.1 ohms
Pin 14 - 17 = Shift solenoid valve B (14 to 18 ohms) = 17 ohms
Pin 15 - 17 = Shift solenoid valve A (14 to 18 ohms) = 17.4 ohms
Pin 16 - 17 = Lock-up solenoid valve (12 to 13.2 ohms) = 13 ohms
Pin 17 - 18 = Line pressure duty solenoid valve (2.6 to 3.2 ohms) = 3.4 ohms
Pin 52 - 17 = Shift solenoid valve C (14 to 18 ohms) = 17.1 ohms
Pin 53 - 17 = Low clutch timing solenoid valve (14 to 18 ohms) =17.1 ohms
Some of the limits are quite tight.
EWS 3D security:
Fault 3 = key 1 - random code tolerance increased.
Fault 0 = key 1 - identification incorrect
Fault E - engine ecu random code xor error.
We also tried the CCU security option too. From here we could see live data changes like pushing the brake pedal and something happening on ma Hawkeye. We also controlled some of the actuators to see if the computer was able to control things, which it could.
I think the way forward on this is to check if the front wheels (rear prop disconnected) are connected via the IRD to the gearbox. If you lift one front wheel and put the auto gearbox from park to neutral, the front wheel should turn. If it turns whilst in park then get someone to stop the rear prop/connection turning and try again. This would check the splines between the new and old gearbox/IRD for wear. EWS 3D also provides a live data it which compares ok. We could see values change and we exercise the Freelander.
Also open and visually check the gear box barrel connectors.
I need more time to do some more research on these faults. Video's to follow later on.
I'll have another look to see if I can find anything on the web to help us. I think either the gearbox has given up or there's an electrical fault.
HawkEye video's of the diagnostics:
Freelander 1 Td4 Auto. HawkEye diagnostic. Auto Gearbox Computer. 1 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Engine Computer. 2 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. ABS Computer. 3 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Airbag Computer. 4 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Immobiliser Computer. 5 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Security CCU Computer. 6 of 6 - YouTube
Faults:
When turning the key to position 2 (electrics only) the speedo jumps up to max. The mileage counter counts up by itself, even thought the engine is not running and the Freelander is stationary. During our playing it clocked up another 90 miles while the ignition was on for a total of about 30 minutes.
The engine starts ok but it doesn't drive forwards or backwards in any gear. The dash does NOT display F4 flashing.
Usual rear passenger lock/window fail, and the fish tank in the boot was full.
The main problem is the Freelander doesn't drive forwards or backwards. The engine starts ok every time. The auto lever moves ok, and the LED by the lever reports the correct position PRND421. The dash also reports the correct PRND421, sport when sport mode is selected and 1 or 2 when manually selecting gears. So that proves the barrel connector carrying the lever position signal is ok, and the dash also supports this. When selecting Drive or Reverse the engine doesn't rock or move and you don't hear any difference in sound. So it's as if there's no additional load on the engine when selecting a gear. The engine revs up ok if requested.
Previously it was driving along quite happily when it lost power. The engine was still running but there was no forward or reverse drive. There was no bang, screech, whine or quack, from what the driver said. The speedo fault where it jumps to max miles per hour and counts up the miles by itself even with the engine on or oft, with the Freelander stationary. This started happening a few months prior to the loss of drive.
Previously it's had 2 different diagnostics and neither could talk to the auto gearbox computer. My Hawkeye could talk to it and retrieve/clear codes. Fault codes are as follows:
Auto gearbox computer:
P1605 faulty controller eeprom (rave says: error flag set)
P0734 gear 4 incorrect ratio (rave says: out of range)
P0735 gear 5 incorrect ratio (rave says: out of range)
The auto gearbox codes all clear ok, but P0734 and P0735 come back. The eeprom error doesn't bother me too much as this seems to pop up regular on my Freelander and others too. There's no signs of oil leaks. We didn't check the condition of the gearbox oil as it was late. We didn't check the fluid level.
We didn't open the barrel connectors on the auto gearbox wiring harness as the resistance measurements were ok, and the connectors were tight. In hindsight it would be a good idea to open the connectors just to check there's nothing bad. The collar turn to open them. But to be fair we have tested both of them enough to have faith they're ok. A quick look won't do any harm.
Engine computer DDE4:
P0480 fan short circuit to ground or open load
P0500 vehicle speed signal can speed signal invalid (signal fault)
Code P0480 clears but code P0500 stays. The first time we tried to get into the engine computer we struggled but every time after that it seemed ok. I get this too on mine, random comms errors when using ma Hawkeye. So that doesn't bother me too much. P0500 is the bigger worry as this relates to the vehicle speed sensor causing a fault. The auto gearbox has a vehicle speed sensor inside it but the resistance measurement is within spec. The fact that it states the vehicle speed sensor value is invalid tie's up with the dash display miles per hour jumping to max when the electric or engine is on. We measured the resistance of the vehicle speed sensor and it's within spec.
There has been an issue where the fans don't work. I proved this is not the case as my Hawkeye could tell the fans to switch on and they did, at varying speeds as requested. So that proves the fans work, but doesn't prove the circuit/request to switch the fans on is ok. I assume the engine computer reads the coolant temp sensor and this triggers the fans starting if the coolant is too hot.
The engine computer reads live data ok, like the coolant temp and battery voltage. It's strange to see the vehicle speed is 3km/hour on the Hawkeye (it was stationary) but I don't know if this is the same on another td4 Freelanders. If someone has a Hawkeye and a td4 can you check the vehicle speed in the engine DDE4 live data menu with the ignition turned to position 2, electrics only. My v6 displays 0km/h. We could also control the radiator fans manually to prove they work, from within the engine computer actuator menu on ma hawkeye.
ABS computer MK20:
5E32 BLS electrical fault (brake light switch?)
5D90 front left sensor electrical fault (we measured it and it's open circuit)
5E15 can interface egs timeout
5DA0 front right sensor electrical fault (we measured it and it's open circuit)
5E17 can gear plausibility
When clearing these codes they all go except 5D90 and 5DA0 which refer to the two front abs sensors failing.
These fault code are difficult to trace as they're not standard P codes. The main problem is both front abs sensors are open circuit. The callipers have been changed at some point and we measured the resistance of the abs sensors and they're both open circuit. We also measured one of the rears to prove our theory, and that was about 1100 ohms. The rear prop is already removed so we lifted one rear wheel and turned it whilst watching ma Hawkeyes abs live data option. Speed went fro 1km/hour to 2 or 3. So that's proves the abs computer is reading live data and working to some extent.
Rave says: "...Failures or malfunctions relating to the sensor, and sensor connections, are detected by the SCS ECU. In the event of failure of two or more of the sensors the SCS ECU switches off the system and illuminates the ABS, TC, EBD, and HDC warning lamps.
...
The longitudinal acceleration sensor (sometimes known as G sensor) is mounted in-cab near the centre-line of the vehicle alongside the handbrake lever. It provides additional information to the SCS ECU regarding vehicle motion, to corroborate inputs from the wheel speed sensors. The signal produced by the longitudinal accelerometer is used by the ABS ECU to check the plausibility of the vehicle speed signal. Where the vehicle wheel speed sensors tell the ECU that the vehicle speed is faster than the actual vehicle speed
...
The ABS ECU continually calculates vehicle speed using the inputs from all four ABS sensors. Vehicle speed is used as a reference against which individual wheel speeds are monitored for unacceptable acceleration or deceleration. Vehicle speed is also output to the instrument pack for the speedometer..."
Which makes me wonder if the abs is causing the problems due to two abs sensors failing.
Air bag computer Autoliv AC4:
33 battery voltage fault intermittent
30 open circuit on SRS warning lamp circuit
Both codes delete and we can also see data like the vin and software number etc. So that proves the air bag computer is working.
example resistance check from my Freelander, not the faulty one on this fred= Freelander 1 v6 Jatco Auto Gearbox - Measuring the Solenoid and Sensor Resistances - YouTube
We also checked the resistance of the auto gearbox solenoids and sensors. Although this doesn't tell us if the solenoids are sticking, it does at least tell us the sensors and solenoids aren't open circuit and within spec.
Sensor resistance limits (connector C0932):
Pin 5 - 20 = Vehicle speed sensor (513 to 627 ohms) = 558 ohms
Pin 21 - 20 = Intermediate speed sensor (513 to 627 ohms) = 559 ohms
Pin 24 - 20 = Turbine speed sensor (513 to 627 ohms) = 550 ohms
Pin 39 - 20 = Fluid temperature sensor (ohms dependent on temp) = 4000ohms = 10 degrees approx
Solenoid resistance limits (connector C0932):
Pin 17 is the common for all solenoid measurements.
Pin 3 - 17 = 2-4 brake duty solenoid valve (2.6 to 3.2 ohms) = 3.4 ohms
Pin 4 - 17 = 2-4 brake timing solenoid valve (14 to 18 ohms) = 16.7 ohms
Pin 10 - 17 = Reduction timing solenoid valve (14 to 18 ohms) = 17.1 ohms
Pin 14 - 17 = Shift solenoid valve B (14 to 18 ohms) = 17 ohms
Pin 15 - 17 = Shift solenoid valve A (14 to 18 ohms) = 17.4 ohms
Pin 16 - 17 = Lock-up solenoid valve (12 to 13.2 ohms) = 13 ohms
Pin 17 - 18 = Line pressure duty solenoid valve (2.6 to 3.2 ohms) = 3.4 ohms
Pin 52 - 17 = Shift solenoid valve C (14 to 18 ohms) = 17.1 ohms
Pin 53 - 17 = Low clutch timing solenoid valve (14 to 18 ohms) =17.1 ohms
Some of the limits are quite tight.
EWS 3D security:
Fault 3 = key 1 - random code tolerance increased.
Fault 0 = key 1 - identification incorrect
Fault E - engine ecu random code xor error.
We also tried the CCU security option too. From here we could see live data changes like pushing the brake pedal and something happening on ma Hawkeye. We also controlled some of the actuators to see if the computer was able to control things, which it could.
I think the way forward on this is to check if the front wheels (rear prop disconnected) are connected via the IRD to the gearbox. If you lift one front wheel and put the auto gearbox from park to neutral, the front wheel should turn. If it turns whilst in park then get someone to stop the rear prop/connection turning and try again. This would check the splines between the new and old gearbox/IRD for wear. EWS 3D also provides a live data it which compares ok. We could see values change and we exercise the Freelander.
Also open and visually check the gear box barrel connectors.
I need more time to do some more research on these faults. Video's to follow later on.
I'll have another look to see if I can find anything on the web to help us. I think either the gearbox has given up or there's an electrical fault.
HawkEye video's of the diagnostics:
Freelander 1 Td4 Auto. HawkEye diagnostic. Auto Gearbox Computer. 1 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Engine Computer. 2 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. ABS Computer. 3 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Airbag Computer. 4 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Immobiliser Computer. 5 of 6 - YouTube
Freelander 1 Td4 Auto. HawkEye diagnostic. Security CCU Computer. 6 of 6 - YouTube
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