S Indicator Circuit Troubleshooting

Turn the ignition switch ON (II).
Shift to the D position.
Measure the voltage between TCM connector terminals A18 and A4 with S mode position selected by turning S mode switch on.

Fig 1: Measuring Voltage Between TCM Connector Terminals A18 And A4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 10 V?
1. YES -Go to step 4.
2. NO -Go to step 5.
Measure the voltage between gauge assembly connector terminal B1 and body ground.

Fig 2: Measuring Voltage Between Gauge Assembly Connector B (22P) Terminal B1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 10 V?
1. YES -Check for blown S indicator bulb. If the indicator bulb is OK, check for loose terminal fit in the TCM and gauge assembly connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) or gauge assembly and recheck.
2. NO -Repair an open in the wire between TCM connector terminal A18 and the gauge assembly connector B(22P).
Turn the ignition switch OFF.
Disconnect TCM connector A (26P).
Disconnect gauge assembly connector B (22P).
Check for continuity between TCM connector terminal A18 and body ground.

Fig 3: Checking Continuity Between TCM Connector A (26P) Terminal A18 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES -Repair a short in the wire between TCM connector terminal A18 and the gauge assembly connector B (22P).
2. NO -Check for loose terminal fit in the TCM and gauge assembly connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) or gauge assembly and recheck.