Acura RL. Manual - part 848

shown. 

Is the tire pressure shown on the HDS monitor within 40 kPa (0.4 kgf/cm

2

 , 6 psi) of the actual tire 

pressure?  

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

NO - Replace the tire pressure sensor (see TIRE PRESSURE SENSOR REPLACEMENT ). 

LOW TIRE PRESSURE INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED ('05-07 
MODELS) 

1. Turn the ignition switch OFF.  

2. Disconnect the TPMS control unit 20P connector.  

3. Turn the ignition switch ON (II).  

4. Check the low tire pressure indicator for several seconds when the ignition switch is turned ON (II). 

Did the indicator come on and then go off?  

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

NO - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC 
FUNCTION ). If necessary, substitute a known-good gauge control module (see GAUGE 
CONTROL MODULE REPLACEMENT ), and recheck. 

LOW TIRE PRESSURE INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED ('08 
MODEL) 

1. Turn the ignition switch ON (II).  

2. Check the low tire pressure indicator for several seconds when the ignition switch is turned ON (II). 

Did the indicator come on and then blink for about 75 seconds?  

YES - Check for gauge DTCs with the HDS (see WIRE COLOR CODES ), and do to the indicated 
gauge DTCs troubleshooting. 

NO - Go to step 3. 

3. Turn the ignition switch OFF.  

NOTE:

If the low tire pressure indicator is turned on at the same time as the TPMS 
indicator, troubleshoot the TPMS indicator does not go off, and no DTCs are 
stored in the TPMS symptom troubleshooting (see TPMS INDICATOR OR 
TIRE(S) INDICATOR(S) DOES NOT COME ON, AND NO DTCS ARE STORED ).

 

2007 Acura RL 

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

  

me 

 

Friday, June 05, 2009 3:22:24 PM

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© 2005 Mitchell Repair Information Company, LLC. 

4. Disconnect the TPMS control unit 20P connector.  

5. Turn the ignition switch ON (II).  

6. Check the low tire pressure indicator for several seconds when the ignition switch is turned ON (II). 

Did the indicator come on and then blink for about 75 seconds?  

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

NO - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC 
FUNCTION ). If necessary, substitute a known-good gauge control module (see GAUGE 
CONTROL MODULE REPLACEMENT ), and recheck. 

TPMS INDICATOR OR TIRE(S) INDICATOR(S) DOES NOT COME ON, AND NO DTCS ARE 
STORED 

1. Check fuses No. 12 (7.5A) and No. 21 (10A) in the driver's under-dash fuse/relay box. 

Are the fuses OK?  

YES - Go to step 2. 

NO - Replace the fuse(s), and recheck. 

2. Turn the ignition switch ON (II).  

3. With the HDS, command the system to turn on the TPMS indicator or tire(s) indicator. 

Does the TPMS indicator or tire(s) indicator come on?  

YES - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC 
FUNCTION ). 

NO - Go to step 4. 

4. Measure the voltage between TPMS control unit connector A (14P) terminal No. 5 and body ground. 

Fig. 34: Measuring Voltage Between TPMS Control Unit Connector A (14P) Terminal No. 5 
And Body Ground 

 

2007 Acura RL 

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

  

me 

 

Friday, June 05, 2009 3:22:24 PM

Page 46 

© 2005 Mitchell Repair Information Company, LLC. 

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?  

YES - Go to step 5. 

NO - Repair open in the wire between TPMS control unit and the fuse No. 21 (10A) in the driver's 
under-dash fuse/relay box. 

5. Turn the ignition switch OFF.  

6. Disconnect TPMS control unit connector A (14P).  

7. Measure the voltage between TPMS control unit connector A (14P) terminal No. 5 and body ground. 

Fig. 35: Measuring Voltage Between TPMS Control Unit Connector A (14P) Terminal No. 5 
And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Repair the short between the wires to the TPMS control unit from fuse No. 12 (7.5A) and No. 
21 (10A) in the driver's under-dash fuse/relay box. 

NO - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

TPMS INDICATOR OR TIRE(S) INDICATOR(S) DOES NOT GO OFF, AND NO DTCS ARE 
STORED 

1. Turn the ignition switch ON (II).  

2. With the HDS, command the system to turn off the TPMS indicator or tire(s) indicator. 

Does the TPMS indicator or tire(s) indicator, then go off?  

YES - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC 
FUNCTION ). 

NO - Go to step 3. 

 

2007 Acura RL 

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

  

me 

 

Friday, June 05, 2009 3:22:24 PM

Page 47 

© 2005 Mitchell Repair Information Company, LLC. 

3. Turn the ignition switch OFF, then disconnect the TPMS control unit connector B (20P).  

4. Turn the ignition switch ON (II), and watch the TPMS indicator or tire(s) indicator. 

Does the TPMS indicator or tire(s) indicator go off?  

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

NO - Go to step 5. 

5. Turn the ignition switch OFF, then disconnect the gauge control module connector B (22P).  

6. Turn the ignition switch ON (II), and watch the TPMS indicator or tire(s) indicator. 

Does the TPMS indicator or tire(s) indicator go off?  

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, 
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck. 

NO - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC 
FUNCTION ). 

TPMS CONTROL UNIT REPLACEMENT 

1. Make sure the ignition switch is OFF.  

2. Remove the rear shelf (see TRIM REMOVAL/INSTALLATION - REAR SHELF AREA ).  

3. Disconnect the TPMS control unit connectors (A). 

Fig. 36: Identifying TPMS Control Unit With Torque Specifications 
Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE:

Make sure the TPMS control unit mounting base is not bent or twisted as this 
may effect communication with the indicators and the tire pressure sensors.

 

2007 Acura RL 

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

  

me 

 

Friday, June 05, 2009 3:22:24 PM

Page 48 

© 2005 Mitchell Repair Information Company, LLC.