AUTOMATIC GEARBOX - ZF4HP22 - 24
Fault effects and warning indications
Fault code,
OBD II
Fault description
Effect
Warning lamp
illumination
(TestBook)
MIL
Sport/
Manual
P0705
* Gear position switch, Maintains current gear in low range, limp
On
On
(14,
23)
incorrect outputs
home mode in high range. Shift pressure to
maximum, harsh gear shifts/engagement.
P0721
(21)
* Downshift safety
monitor prevented
Maintains current gear in low range, limp
home mode in high range. Shift pressure to
On
On
downshift which would maximum, harsh gear shifts/engagement.
have caused engine
overspeed
P0722
(22)
* Torque converter
slipping
Maintains current gear in low range, limp
home mode in high range. Shift pressure to
maximum, harsh gear shifts/engagement.
On
On
On
On
On
On
On
Off
Off
Off
P0731
(29)
* Ratio monitoring,
implausible 1st gear
ratio
No apparent effect
No apparent effect
No apparent effect
No apparent effect
May affect driveability.
P0732
(30)
* Ratio monitoring,
implausible 2nd gear
ratio
P0733
(31)
* Ratio monitoring,
implausible 3rd gear
ratio
P0734
(32)
* Ratio monitoring,
implausible 4th gear
ratio
P0741
(5)
* Torque converter
lock-up clutch fault
On
On
Off
On
P0743
* Torque converter
lock-up solenoid (MV
Limp home mode in low and high ranges. Shift
pressure to maximum, harsh gear shifts/
engagement.
(7,
25)
3),
open or short circuit
P0748
* Pressure regulating
Limp home mode in low and high ranges. Shift
On
On
On
Off
On
On
On
On
On
On
(10,
28)
solenoid (MV 4), open pressure to maximum, harsh gear shifts/
or short circuit
* Shift solenoid (MV 1), Limp home mode in low and high ranges. Shift
engagement.
P0753
(8,
26)
open or short circuit
pressure to maximum, harsh gear shifts/
engagement.
P0758
* Shift solenoid (MV 2), Limp home mode in low and high ranges. Shift
open or short circuit
(9,
27)
pressure to maximum, harsh gear shifts/
engagement.
P1562
(24)
* Battery supply below Maintains current gear in low range, limp
9V while engine
running
home mode in range. Shift pressure to
maximum, harsh gear shifts/engagement.
P1601
(4)
* ECU, EEPROM
checksum
Limp home mode in low and high ranges. Shift
pressure to maximum, harsh gear shifts/
engagement.
P1606
(3)
* EEPROM
* Watchdog
No apparent effect
On†
On
Off
On
On
P1606
(6)
No apparent effect
P1612
(2)
* Solenoid valves
power supply relay,
sticking closed or open
circuit
Limp home mode in low and high ranges. Shift
pressure to maximum, harsh gear shifts/
engagement.
On
DESCRIPTION AND OPERATION
44-19
| Categories | Land Rover Defender, Land Rover Discovery II, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Discovery Series II |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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