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Home >> Jeep >> 2004 >> Wrangler SE, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures >> Diagnostic Information And Procedures >> Compass/Mini-Trip Computer >> Symptom: *TEMPERATURE DISPLAY INACCURATE OR INOPERATIVE >> Diagnostic Procedure

Diagnostic Procedure

TEMPERATURE DISPLAY INACCURATE OR INOPERATIVE - DIAGNOSTIC PROCEDURE

TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Measure the resistance of the Ambient Temperature Sensor between pin 1 and pin 2.
The Ambient Temperature Sensor should measure within the following values:
10°C (50°F) Sensor Resistance = 17.99k - 21.81k Ohms
20°C (68°F) Sensor Resistance = 11.37k - 13.61k Ohms
25°C (77°F) Sensor Resistance = 9.12k - 10.88k Ohms
30°C (86°F) Sensor Resistance = 7.37k - 8.75k Ohms
40°C (104°F) Sensor Resistance = 4.90k - 5.75k Ohms
50°C (122°F) Sensor Resistance = 3.33k - 3.88k Ohms
Does the Ambient Temperature Sensor resistance measure between the min/max specifications?
  1. Yes : Go To 2
  2. No : Replace the Ambient Temperature Sensor in accordance with the Service Information. Note: After any repair for an Ambient Temperature Sensor problem, the vehicle must be driven for more than 2 minutes to update the display.

    Perform BODY VERIFICATION TEST .

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2 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Disconnect the Compass/Temperature Mirror harness connector.
Measure the resistance of the Signal circuit between the Ambient Temperature Sensor connector and the Compass/Temperature Mirror connector.
Is the resistance above 5.0 ohms?
  1. Yes : Repair the Ambient Temperature Sensor Signal circuit for an open. Note: After any repair for an Ambient Temperature Sensor problem, thee vehicle must be driven for more than 2 minutes to update the display.

    Perform BODY VERIFICATION TEST .

  2. No : Go To 3
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3 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Disconnect the Compass/Temperature Mirror harness connector.
Measure the resistance between ground and the Ambient Temperature Sensor Signal circuit.
Is the resistance below 5.0 ohms?
  1. Yes : Repair the Ambient Temperature Sensor Signal circuit for a short to ground. Note: After any repair for an Ambient Temperature Sensor problem, the vehicle must be driven for more than 2 minutes to update the display.

    Perform BODY VERIFICATION TEST .

  2. No : Go To 4
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4 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Disconnect the Compass/Temperature Mirror harness connector.
Measure the resistance of the Sensor Ground circuit between the Ambient Temperature Sensor connector and the Compass/Temperature Mirror connector.
Is the resistance above 5.0 ohms?
  1. Yes : Repair the Ambient Temperature Sensor Ground circuit for an open. Note: After any repair for an Ambient Temperature Sensor problem, the vehicle must be driven for more than 2 minutes to update the display.

    Perform BODY VERIFICATION TEST .

  2. No : Replace the Compass/Temperature Mirror in accordance with the Service Information. Note: After any repair for an Ambient Temperature Sensor problem, the vehicle must be driven for more than 2 minutes to update the display.

    Perform BODY VERIFICATION TEST .

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