Engine electrical equipment Toyota Highlander 1 (XU20)

Engine Electrical Specifications
Charging system Battery voltage - 12.5-12.9 V Charging voltage - 13.2-14.8 V Tightening torques for threaded connections, Nm (unless otherwise stated) Starter mounting bolts Models with four-cylinder engines 2001-2003 —...

General Information, Precautions and Disconnecting the Battery
The engine electrical systems are the ignition, charging and starting systems. Since their functions are dependent on the engine, they are considered separately from body electrical equipment such as lights,...

Battery — foreign battery start
Refer to paragraph « Starting the engine from a foreign battery » at the beginning of this guide.

Battery — Check and Replace
Examination 1. Disconnect the ground wire from the battery, and then the positive wire. 2. Check the battery charging status. Visually inspect the indicator on the top of the battery. If the indicator is black, charge...

Battery wires — check and replace
1. Periodically inspect each battery cable along its entire length for damage, cracks in the case or burnt insulation and corrosion. Poor condition of battery wires can cause starting problems and poor engine...

Ignition system — general information and precautions
1. All models covered in this manual are equipped with a computerized electronic ignition system. The ignition system includes a camshaft position sensor (SMR), crankshaft position sensor (TFR), a number of other...

Ignition system — check
Attention! Due to the generation of high voltage in the ignition system, be extremely careful when servicing or checking components of this system. This applies not only to coils and spark plugs, but also to test...

Ignition coils — replacement
Note. Vehicle manufacturers Toyota and Lexus do not publish data on resistance values for the primary and secondary circuits of the ignition coils/control units used on these models. 1. Disconnect the ground wire from...

Charging System — General Information and Precautions
The charging system includes a generator, a voltage regulator, a battery charging control pump, a battery, a fusible link and electrical wiring connecting all these elements. The charging system supplies electricity for...

Charging System — Check
1. If a malfunction occurs in the electrical charging circuit, do not rush to think that the alternator is to blame. First check the following points: A) Make sure that the wire clamps on the battery terminals are clean...

Generator — removal and installation
Removing 1. Disconnect the ground wire from the battery (see paragraphs 1 and 3 ). 2. Remove the alternator drive belt ( see chapter 1 ). Models with a four-cylinder engine 3. Disunite electric sockets on the generator....

Starting system — general information and precautions
The starting system includes a battery, a starter, a starter solenoid and wires connecting these elements. The solenoid is mounted directly on the starter. The solenoid assembly with the starter is located on top of the...

Starter and electrical circuit — check
1. If a malfunction occurs in the starting electrical circuit, do not rush to think that the starter is to blame. First check the following points: A) Make sure that the wire clamps on the battery terminals are clean...

Starter — removal and installation
Models with four-cylinder engines 1. Disconnect the ground wire from the battery (see paragraphs 1 and 3 ). 2. On 2003 and earlier models, remove the air filter housing and air intake duct ( see chapter 4 ). On 2004 and...