S2000 L4-2.2L (2004)
Temperature Gauge: Testing and Inspection
Coolant Temperature Gauge Circuit Troubleshooting
1. Check for DTCs with the HDS.
Is DTC P0116, P0117, or P0118 indicated?
YES - Go to the ECM DTC Troubleshooting Index.
NO - Go to step 2.
2. Remove the gauge assembly.
3. Disconnect the gauge assembly connector B (30P) and the ECM connector A (32P).
4. Check for continuity between the gauge assembly connector B (30P) No.5 terminal and ECM connector A (32P) No.1 terminal.
Is there continuity?
YES - Go to step 5.
NO - Repair open in the YEL/GRN wire between the gauge assembly and the ECM.
5. Check for continuity between the gauge assembly connector B (30P) No.5 terminal and body ground.
Is there continuity?
YES - Check the output from the ECM first, if OK, repair short to body ground in the YEL/GRN wire between the gauge assembly and the ECM.
NO - Check connections, if OK, substitute a known-good gauge assembly. If the problem goes away, replace the main printed circuit board in the
gauge assembly.
