Acura RL. Manual - part 543

6. Turn the ignition switch OFF.  

7. Disconnect the fuel tank unit 5P connector (see FUEL GAUGE SENDING UNIT TEST ).  

8. Disconnect gauge control module connector A (20P).  

9. Check for continuity between fuel tank unit 5P connector terminal No. 2 and body ground. 

Fig. 23: Checking Continuity Between Fuel Tank Unit 5P Connector Terminal No. 2 And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair a short to ground in the wire. 

NO - Go to step 10. 

10. Disconnect the secondary fuel gauge sending unit 5P connector (see FUEL GAUGE SENDING 

UNIT TEST ).  

11. Check for continuity between secondary fuel gauge sending unit 5P connector terminal No. 1 and 

body ground. 

Fig. 24: Checking Continuity Between Secondary Fuel Gauge Sending Unit 5P Connector 
Terminal No. 1 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair a short to ground in the wire. 

NO - Go to step 12. 

 

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2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

  

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12. Check for continuity between fuel tank unit 5P connector terminal No. 1 and body ground. 

Fig. 25: Checking Continuity Between Fuel Tank Unit 5P Connector Terminal No. 1 And Body 
Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair a short to ground in the wire. 

NO - Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ). 

DTC B1177: BATTERY VOLTAGE ABNORMAL 

1. Clear the DTCs with the HDS.  

2. Turn the ignition switch OFF, and then back ON.  

3. Check for DTCs with the HDS. 

Is DTC B1177 indicated?  

YES - Go to step 5. 

NO - Go to step 4. 

4. Crank the engine. 

Is DTC B1177 indicated?  

YES - Go to step 5. 

NO - Intermittent failure, the gauge control module and power supply voltage (IG1) that is supplied to 
the gauge control module are OK at this time. The battery may have been discharged and recovered. 

5. Check the battery (see BATTERY TEST ) and the charging system (see ALTERNATOR AND 

REGULATOR CIRCUIT TROUBLESHOOTING ). 

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions 
in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN 
SYSTEM DIAGNOSIS TEST MODE A ).

 

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Is the battery condition normal and the charging system OK?

YES - Go to step 6. 

NO - Recharge or replace the battery, or repair the charging system. 

6. With gauge control module connector B (28P) still connected, measure the voltage between the No. 1 

terminal and body ground. 

Fig. 26: Measuring Voltage Between No. 1 Terminal And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Go to step 7. 

NO - Repair an open or high resistance in the PNK wire between the gauge control module and 
driver's under-dash fuse/relay box. 

7. Disconnect the gauge control module connectors.  

8. Check for continuity between gauge control module connector A (20A) terminal No. 7 and connector 

B (28P) terminal No. 1. 

Fig. 27: Checking Continuity Between Gauge Control Module Connector A Terminal No. 7 And 
Connector B Terminal No. 1 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

 

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YES - Replace the gauge control module (see GAUGE CONTROL MODULE 
REPLACEMENT ). 

NO - Repair an open or high resistance in the BLK wire between the gauge control module and 
ground (G501). 

DTC B1181: GAUGE CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS 
UNIT (DOORSW MESSAGE); DTC B1182: GAUGE CONTROL MODULE LOST 
COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOKSW MESSAGE) 

1. Clear the DTCs with the HDS.  

2. Turn the ignition switch OFF, and then back ON (II).  

3. Wait for 6 seconds or more.  

4. Check for DTCs with the HDS. 

Is DTC B1181 and/or B1182 indicated?  

YES - Go to step 5. 

NO - Intermittent failure, the gauge control module is OK at this time. Check for loose or poor 
connections. 

5. Check for DTCs with the HDS. 

Are DTCs B1014, B1015, B1064, B1065, B1405*, B1406*, B1613, B1614, and B1811 also indicated? 
(*: '05-06 models)  

YES - Do the driver's MPCS input test (see DRIVER'S MPCS UNIT INPUT TEST ). 

NO - Do the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ). 

REWRITING THE ODO DATA AND TRANSFERRING THE MAINTENANCE 
MINDER ON A NEW GAUGE CONTROL MODULE 

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions 
in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN 
SYSTEM DIAGNOSIS TEST MODE A ).

NOTE:



Obtain a new gauge control module before starting the rewriting 
process.  



Rewriting is not possible on a gauge control module that will not 
communicate with the HDS.  



Make sure that the HDS shows the correct VIN for the car you are 
working on.  



Once you have started this procedure, you must complete it before 
removing the HDS from the DLC.  



Connect a battery jumper box (not a battery charger) to insure that 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

  

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