Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition
1 374 I.,,,,,,,,, Autodata LAND ROVER Model: Range Rover 2,5D Turbo Year: 1994-02 Engine management Engine code: 256T System: Bosch MSA 11 Under fascia, passengets side General information Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults. 0 Trouble codes are displayed by the malfunction indicator lamp (MIL). o The ECM fault memory can also be checked using diagnostic equipment connected to the data link connector (DLC). Accessing Ensure ignition switched OFF. Bridge data link connector (DLC) terminals 4 and 15 0. Switch ignition ON. Trouble codes will be displayed after a short flash H [A] and a long pause H [B]. Count MIL flashes. Note trouble codes. Compare with trouble code table. Each trouble code consists of two groups of one or more flashes. The first group of flashes indicate the 'tens' of the trouble code H [c]. The second group of flashes indicate the 'units' of the trouble code H [Dl. A short pause separates each trouble code group H [El. A long pause separates each trouble code H [F]. For example: Trouble code 12 displayed H. Each trouble code including 12 displayed three times. Erasing The engine control module (ECM) fault memory can only be erased using diagnostic equipment connected to the data link connector (DLC). Repeat checking procedure to ensure no data remains in ECM fault memory.
Model: Range Rover 2,5D Turbo LAND ROVER Trouble code identification Flashlscanner Fault location type 12 14 15 16 17 19 2 1 23 I Start and end of diagnosis - some models Engine coolant temperature (ECT) sensor - voltage low Engine coolant temperature (ECT) sensor - voltage high Fuel temperature sensor - voltage low Fuel temperature sensor - voltage high I Probable cause 24 I Vehicle speed sensor (VSS) - no signal I Wiring, VSS, ECM - Wiring short to earth, ECT sensor, ECM 3 1 I Engine speed (RPM) sensor - no signal ( Wiring, RPM sensor 34 37 Engine speed (RPM) sensor - incorrect signal Accelerator pedal position (APP) sensor - voltage high Accelerator pedal position (APP) sensor - incorrect idle speed signal Wiring short to positivelopen circuit, ECT sensor, ECM Wiring short to earth, ECT sensor, ECM Wiring short to positivelopen circuit, ECT sensor, ECM Wiring, RPM sensor, reluctor ring, ECM Wiring short to positivelopen circuit, APP sensor, ECM Wiring, APP sensor, ECM 39 I Immobilizer - activated 1 Wirina, incorrect kev, ECM 41 42 Injection timing control - out of range Brake pedal position (BPP) switch - incorrect siqnal - Wiring, fuel injection pump, ECM Wiring. BPP switch 43 Manifold absolute pressure (MAP) sensor, TC boost I Wiring, MAP sensor, TC pressure - invalid signal 44 Manifold absolute pressure (MAP) sensor, TC boost pressure - voltage low Manifold absolute pressure (MAP) sensor, TC boost pressure - voltage high Manifold absolute pressure (MAP) sensor, TC boost pressure - incorrect signal 48 I Batte~y supply voltage - low I Wiring, battery, ECM relay, ECM 49 I Glow plug control - circuit malfunction Wiring short to earth, MAP sensor Wiring short to positivelopen circuit, MAP sensor Wiring, MAP sensor, TC Wiring, glow plugs, glow plug control module 54 I Fuel shut-off solenoid - circuit malfunction I Wiring short to earth, fuel shut-off solenoid 55 61 Engine control module (ECM) - defective Fuel quantity adjuster position sensor - incorrect signal Fuel quantity adjustment control - malfunction Engine control module (ECM) - overheating -- - Wiring, fuel quantity adjusterlposition sensor, ECM Wiring, module temperature switch, ambient temperature 73 I Intake air temperature (IAT) sensor - voltage low I Wiring short to earth, IAT sensor, ECM 74 / Intake air temperature (IAT) sensor - voltage high Wiring short to positivelopen circuit, IAT sensor, ECM 8 1 I lniector needle lift sensor - circuit malfunction I Wiring, injector needle lift sensor ECM Wiring, fuel quantity adjuster position sensor 82 I Injector needle lift sensor - incorrect signal I Injector needle lift sensor, ECM 83 84 Immobilizer control module - programming Immobilizer control module - no siqnal Immobilizer control module incorrectlylnot programmed Immobilizer control module -a- Eng~ne management 375
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Model: Range Rover 2,5D Turbo LAND ROVER<br />
<strong>Trouble</strong> code identification<br />
Flashlscanner <strong>Fault</strong> location<br />
type<br />
12<br />
14<br />
15<br />
16<br />
17<br />
19<br />
2 1<br />
23<br />
I<br />
Start <strong>and</strong> end of diagnosis - some models<br />
Engine coolant temperature (ECT) sensor - voltage low<br />
Engine coolant temperature (ECT) sensor - voltage high<br />
Fuel temperature sensor - voltage low<br />
Fuel temperature sensor - voltage high<br />
I<br />
Probable cause<br />
24 I Vehicle speed sensor (VSS) - no signal I Wiring, VSS, ECM<br />
-<br />
Wiring short to earth, ECT sensor, ECM<br />
3 1 I Engine speed (RPM) sensor - no signal ( Wiring, RPM sensor<br />
34<br />
37<br />
Engine speed (RPM) sensor - incorrect signal<br />
Accelerator pedal position (APP) sensor - voltage high<br />
Accelerator pedal position (APP) sensor - incorrect idle<br />
speed signal<br />
Wiring short to positivelopen circuit, ECT<br />
sensor, ECM<br />
Wiring short to earth, ECT sensor, ECM<br />
Wiring short to positivelopen circuit, ECT<br />
sensor, ECM<br />
Wiring, RPM sensor, reluctor ring, ECM<br />
Wiring short to positivelopen circuit, APP<br />
sensor, ECM<br />
Wiring, APP sensor, ECM<br />
39 I Immobilizer - activated 1 Wirina, incorrect kev, ECM<br />
41<br />
42<br />
Injection timing control - out of range<br />
Brake pedal position (BPP) switch - incorrect siqnal<br />
-<br />
Wiring, fuel injection pump, ECM<br />
Wiring. BPP switch<br />
43 Manifold absolute pressure (MAP) sensor, TC boost I Wiring, MAP sensor, TC<br />
pressure - invalid signal<br />
44<br />
Manifold absolute pressure (MAP) sensor, TC boost<br />
pressure - voltage low<br />
Manifold absolute pressure (MAP) sensor, TC boost<br />
pressure - voltage high<br />
Manifold absolute pressure (MAP) sensor, TC boost<br />
pressure - incorrect signal<br />
48 I Batte~y supply voltage - low I Wiring, battery, ECM relay, ECM<br />
49 I Glow plug control - circuit malfunction<br />
Wiring short to earth, MAP sensor<br />
Wiring short to positivelopen circuit, MAP<br />
sensor<br />
Wiring, MAP sensor, TC<br />
Wiring, glow plugs, glow plug control<br />
module<br />
54 I Fuel shut-off solenoid - circuit malfunction I Wiring short to earth, fuel shut-off solenoid<br />
55<br />
61<br />
Engine control module (ECM) - defective<br />
Fuel quantity adjuster position sensor - incorrect signal<br />
Fuel quantity adjustment control - malfunction<br />
Engine control module (ECM) - overheating<br />
-- -<br />
Wiring, fuel quantity adjusterlposition<br />
sensor, ECM<br />
Wiring, module temperature switch,<br />
ambient temperature<br />
73 I Intake air temperature (IAT) sensor - voltage low I Wiring short to earth, IAT sensor, ECM<br />
74 / Intake air temperature (IAT) sensor - voltage high Wiring short to positivelopen circuit, IAT<br />
sensor, ECM<br />
8 1 I lniector needle lift sensor - circuit malfunction I Wiring, injector needle lift sensor<br />
ECM<br />
Wiring, fuel quantity adjuster position<br />
sensor<br />
82 I Injector needle lift sensor - incorrect signal I Injector needle lift sensor, ECM<br />
83<br />
84<br />
Immobilizer control module - programming<br />
Immobilizer control module - no siqnal<br />
Immobilizer control module incorrectlylnot<br />
programmed<br />
Immobilizer control module<br />
-a- Eng~ne management 375
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