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Contents Wiring diagrams Section: Engine Controls - System & Component Testing - V6 & V8 All sections

All Models Toyota Tacoma I facelift

Engine Controls - System & Component Testing - V6 & V8 7 illustrations ~383 words

All Models

Intake air temperature sensor is incorporated with airflow meter. See AIRFLOW METER .

Scheme 474

Scheme 474: Avalon, Camry, Camry Solara, Highlander, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner
Scheme 474: Avalon, Camry, Camry Solara, Highlander, Sienna, Tacoma, Tundra 3.4L V6 & 4Runner

Scheme 475

Scheme 475
Scheme 475
  1. Knock sensors No. 1 and 2 are located below intake manifold on cylinder block. (Scheme 474)and (Scheme 475). Manufacturer lists testing procedure with knock sensor removed from cylinder block before testing. Remove knock sensor. See «KNOCK SENSOR»(ref-133227-S37923688532002021900000) under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article.
  2. Using ohmmeter, check that no continuity exists between electrical terminal on knock sensor and body of knock sensor. Replace knock sensor if continuity exists.

Scheme 476

Scheme 476: Land Cruiser, Sequoia & Tundra 4.7L V8
Scheme 476: Land Cruiser, Sequoia & Tundra 4.7L V8
  1. Knock sensors No. 1 and 2 are located below intake manifold on cylinder block. (Scheme 476) Remove intake manifolds for access to knock sensor. See «KNOCK SENSOR»(ref-133227-S37923688532002021900000) under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article for removal of intake manifolds.
  2. Disconnect electrical connector at knock sensor. Using ohmmeter, check that no continuity exists between electrical terminal on knock sensor and body of knock sensor. Replace knock sensor if continuity exists.

Scheme 477

Scheme 477: A/T Models
Scheme 477: A/T Models

Scheme 478

Scheme 478
Scheme 478

Scheme 479

Scheme 479
Scheme 479

Scheme 480

Scheme 480
Scheme 480
  1. Disconnect electrical connector at Park/Neutral Position (PNP) switch. PNP switch is mounted on side of transmission/transaxle. Note terminal identification. (Scheme 477)- (Scheme 480).
  2. Using ohmmeter, check for continuity between specified terminals with shift lever in proper positions. See «PARK/NEUTRAL POSITION SWITCH SPECIFICATIONS»(ref-133222-S01880505772002021900000) table. If proper continuity does not exist, adjust or replace PNP switch as necessary. For adjustment or replacement of PNP switch, see «PARK/NEUTRAL POSITION SWITCH»(ref-133227-S12325367482002021900000) under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. PARK/NEUTRAL POSITION SWITCH SPECIFICATIONS Application & Shift Lever Position Continuity Between Terminals No. Avalon, Camry Solara & Sienna Park 2 & 7; 5 & 6 Reverse 2 & 8 Neutral 2 & 9; 5 & 6 Drive 2 & 10 2 2 & 3 Low 2 & 4 Camry Park 1 & 3; 6 & 9 Reverse 2 & 3 Neutral 3 & 5; 6 & 9 Drive 3 & 7 2 3 & 4 Low 3 & 8 Highlander, Land Cruiser, Sequoia, Tacoma, Tundra & 4Runner Park 1 & 3; 6 & 9 Reverse 2 & 3 Neutral 3 & 5; 6 & 9 Drive 3 & 7 2 3 & 4 Low 3 & 8