Prelude Type-SH L4-2157cc 2.2L DOHC H22A4 (VTEC) 16V (1998)
Temperature Gauge: Testing and Inspection
1. Check the No. 13 (15 A) fuse in the under-dash fuse/ relay box before testing.
2. Make sure the ignition switch is OFF, then disconnect the YEL/GRN wire from the coolant temperature gauge sending unit, and ground it with a
jumper wire.
3. Turn the ignition switch ON (II).
Check that the pointer of the coolant temperature gauge starts moving toward the "H" mark.
CAUTION: Turn the ignition switch OFF before the pointer reaches "H" on the gauge dial. Failure to do so may damage the gauge.
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If the pointer of the gauge does not move at all, check for an open in the YEL/GRN wire.
If the wires are OK, replace the coolant temperature gauge.
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If the coolant temperature gauge works, test the coolant temperature sending unit.