Toyota2008–2012

Landcruiser 4.7 V8: Common faults & known problems

Common faults & known problems

7 known faults documented in workshop bulletins. Of these, three concern the electrical and ignition and two the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.

Technical specifications

Engine & fuel system

2 documented faults — symptoms, causes and workshop fixes.

Slow or no engagement of rear differential lock following repair or service

Affects All models.

Cause

Incorrect specification rear differential oil used.

Repair

Renew rear differential oil. Ensure rear differential oil to manufacturer's specifications.

Data: Motorwise Workshop. Bulletin 6.

Unable to remove in-tank fuel pump

Overview

Affects: All models with in-tank fuel pump assembly retaining ring.
Remedy: Fit new part

Cause

Retaining ring for fuel pump assembly seized to fuel tank.

Repair

Cut through retaining ring to enable removal from fuel tank. Avoid damaging fuel tank threads.
Inspect fuel tank threads for damage. If fuel tank threads damaged or new retaining ring will not tighten: Fit new fuel tank.

Data: Motorwise Workshop. Bulletin 7.

Electrical & ignition

3 documented faults — symptoms, causes and workshop fixes.

Tailgate will not release when release switch pressed

Affects All models.Fit new part

Cause

Tailgate release switch contaminated with corrosion or dirt.

Repair

Fit new tailgate release switch.

Data: Motorwise Workshop. Bulletin 1.

Reverse lamps not working even though fuse intact

Affects All models.

Cause

Additional fuse for reverse lamp circuit blown.

Repair

Check all fuses. Replace blown fuse(s).

Data: Motorwise Workshop. Bulletin 4.

SRS warning lamp illuminated

Overview

Affects: All models.
Fault codes: B1856

Symptoms

Trouble code stored in SRS control module fault memory: B1856.

Cause

Wiring harness multi-plug not correctly latched to LH rear side airbag.

Repair

Ensure wiring harness multi-plug is fully engaged and latched to LH rear side airbag.
Erase any stored trouble codes.

Data: Motorwise Workshop. Bulletin 5.

Brakes

2 documented faults — symptoms, causes and workshop fixes.

ABS warning lamp illuminated. Trouble code stored: C1201

Overview

Affects: All models with ABS.
Fault codes: C1201
Remedy: Fit new part

Cause

Engine control module (ECM) faulty.

Repair

Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
If no fault(s) found: Fit new engine control module (ECM).

Data: Motorwise Workshop. Bulletin 2.

ABS warning lamp illuminated

Overview

Affects: All models with ABS.

Symptoms

ABS fuse (30A) blows immediately when replaced.

Cause

ABS wiring harness chafed through in engine bay causing short circuit.

Repair

Inspect wiring harness for chafing. Repair wiring harness as necessary.
Replace blown fuse.

Data: Motorwise Workshop. Bulletin 3.

Glossary

Technical terms used in this guide.

ECM: Engine control module — the electronic unit that manages the engine
ABS: Anti-lock braking system — stops the wheels locking under hard braking
Trouble Codes: Standardised fault codes stored by the engine control module, read with a diagnostic tool
LH: Left-hand — the left side of the vehicle as you sit in it
SRS: Supplementary restraint system — the airbags and seat-belt pretensioners
Control Module: A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
Fault Memory: The list of stored trouble codes in a control module
In-Tank Fuel Pump: The fuel pump mounted inside the fuel tank
Multi-Plug: A multi-pin electrical connector on a wiring harness
Trouble Code: A standardised fault code stored by a control module, read with a diagnostic tool
Wiring Harness: The bundled cables that carry power and signals around the vehicle

Frequently asked questions

What are the common faults with the Toyota Landcruiser 4.7 V8?

This guide contains seven workshop bulletins for the Toyota Landcruiser 4.7 V8. Of these, three concern the electrical and ignition and two the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.

Does every Toyota Landcruiser 4.7 V8 have these faults?

No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.

Can I check for Toyota Landcruiser 4.7 V8 faults myself?

Many of them. The documented symptoms can be seen, heard or felt during a test drive.