How To Test The TPS w/ Manual Transaxle (1987-1991 2.0L Toyota Camry)

TEST 5: TPS Continuity Tests - Part 3

In this last test section, we're gonna make sure that the Power Switch (PWS) circuit closes (activates) when open the throttle plate to its wide open position.

NOTE: This test is done on the male spade terminals of the throttle position sensor itself.

Here are the steps:

1. 1

   Disconnect the TPS from its 3-wire connector.

2. 2

   Place your multimeter in Ohms mode.

3. 3

   Open the throttle plate to its fully open position (wide open throttle -WOT).

4. 4

   Measure the resistance between male spade terminals 2 and 3.
   
   Terminals 2 and 3 are the Idle Switch (IDL) circuit of the TP sensor.
   
   Terminal 2 should correspond to the BRN wire of the 3-wire connector.
   
   Terminal 3 should correspond to the BLU wire of the 3-wire connector.

5. 5

   Continuity SHOULD NOT exist between terminals 2 and 3.

6. 6

   Measure the resistance between male spade terminals 1 and 2.
   
   Terminals 1 and 2 are the Power Switch (PSW) circuit of the TP sensor.
   
   Terminal 1 should correspond to the BLK/RED wire of the 3-wire connector.
   
   Terminal 2 should correspond to the BRN wire of the 3-wire connector.

7. 7

   Continuity should exist between terminals 1 and 2.

Let's take a look at your test results:

CASE 1: The indicated terminals have continuity and no continuity. This is the correct and expected test result.

You can conclude that the TPS is good (not defective), if you have:

• The TPS passed the continuity tests in TEST 1.
• The TPS passed the continuity tests in TEST 2.
• The TPS passed the continuity tests in this test section.

CASE 2: Terminals 2 and 3 have continuity. This usually points a misadjusted or bad throttle position sensor.

Your next step is to adjust the TPS. The following tutorial will help you adjust the TPS:

• How To Adjust The TPS w/ Manual Transaxle (1987-1991 2.0L Toyota Camry).

CASE 3: Terminals 1 and 2 have NO continuity. This usually points a misadjusted or bad throttle position sensor.

Your next step is to adjust the TPS. The following tutorial will help you adjust the TPS:

• How To Adjust The TPS w/ Manual Transaxle (1987-1991 2.0L Toyota Camry).

More 2.0L Toyota Camry Tutorials

You can find a complete list of 2.0L Toyota Camry tutorials and wiring diagrams in this index:

• 2.0L Toyota Camry Index of Articles

Here's a sample of the tutorials you'll find there:

• TPS Idle Switch Multimeter Test (1987-1991 2.0L Toyota Camry).
• How To Test For A Blown Head Gasket (1987-1991 2.0L Toyota Camry).
• How To Test The Engine Compression (1987-1991 2.0L Toyota Camry).
• How To Test The MAF Sensor (1987-1991 2.0L Toyota Camry).