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If only the engine coolant temperature gauge does not operate, the engine ECU system,
the combination meter, the wiring harness or its connector may be defective.
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- Damaged harness wires and connectors
- Malfunction of the engine coolant temperature gauge unit
- Malfunction of combination meter
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(1)Disconnect the A-108 engine coolant temperature gauge unit connector.
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(2)Connect a test lamp (12 V -
3.4 W to 12 V -
7.0 W) to the wiring harness
side connector. (3)Ignition switch: ON
Q.
Does the test lamp illuminate?
Go to Step 5.
Go to Step 2.
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Q.
Is combination meter connector C-113 and engine coolant temperature gauge unit connector
A-108 in good condition?
Go to Step 3.
Repair or replace the damage component(s).
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Q.
Is the engine coolant temperature gauge normal?
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The procedure is complete. (If no malfunctions are found in all steps, an intermittent
malfunction is suspected. Refer to GROUP 00 /
How to Cope with Intermittent Malfunction ).
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note |
Prior to the wiring harness inspection, check intermediate connector C-53 <L.H. drive
vehicles> or C-35 <R.H. drive vehicles>, and repair if necessary.
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Q.
Is the wiring harness between combination meter connector C-113 (terminal 21) and
engine coolant temperature gauge unit connector A-108 (terminal 1) in good condition?
Go to Step 6.
Repair or replace the damage component(s).
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(1)Disconnect the A-108 engine coolant temperature gauge unit connector.
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(2)Connect a test lamp (12 V -
3.4 W to 12 V -
7.0 W) to the wiring harness
side connector. (3)Ignition switch: ON
Q.
Does the engine coolant temperature gauge in the combination meter fluctuate about
half of it full scale?
Replace the engine coolant temperature gauge unit.
Go to Step 6.
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Q.
Is the engine coolant temperature gauge normal?
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The procedure is complete. (If no malfunctions are found in all steps, an intermittent
malfunction is suspected. Refer to GROUP 00 /
How to Cope with Intermittent Malfunction ).
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Replace the combination meter.
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