DTC 45: Initiator Circuit Short Detection

WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the ignition switch OFF, then turn it ON (II) again.
Check for DTCs with the HDS.
Is DTC 45 indicated?

YES -Go to step 5.

NO -The system is OK at this time.
Turn the ignition switch OFF.
Disconnect TPMS control unit connectors A (14P) and B (20P).

Check for continuity between the appropriate terminal in TPMS control unit connector A (14P) and body ground (see table).

CONTINUITY SPECIFICATIONS

Terminal name	TPMS control unit terminal No.
RF LF PWR.	9
LF LF PWR.	8
RR LF PWR.	11
LR LF PWR.	10

Fig 1: Checking Continuity Between TPMS Control Unit Connector (14P) And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 8.

NO -Go to step 10.

Disconnect the appropriate initiator 3P connector.

Check for continuity between the appropriate terminal in TPMS control unit connector A (14P) and body ground (see table).

CONTINUITY SPECIFICATIONS

Terminal name	TPMS control unit terminal No.
RF LF PWR.	9
LF LF PWR.	8
RR LF PWR.	11
LR LF PWR.	10

Fig 2: Checking Continuity Between TPMS Control Unit Connector (14P) And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair the short to body ground in the appropriate wire between the TPMS control unit and the initiator.

NO -Replace the initiator (see INITIATOR REPLACEMENT ).

Check for continuity between the appropriate terminal in TPMS control unit connector A (14P) and connector B (20P) terminals (see table).

CONTINUITY SPECIFICATIONS

Tire location	TPMS control unit terminal name/No.
Tire location	Connector A (14P)	Connector B (20P)
Right-front	RF LF PWR./9	RF LF GND/14
Left-front	LF LF PWR./8	LF LF GND/13
Right-rear	RR LF PWR./11	RR LF GND/16
Left-rear	LR LF PWR./10	LR LF GND/15

Fig 3: Checking Continuity Between TPMS Control Unit Connector (14P) And Connector (20P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to Step 11.

NO -Go to Step 13.

Disconnect the appropriate initiator 3P connector.

Check for continuity between the appropriate terminal in TPMS control unit connector A (14P) and connector B (20P) terminals (see table).

CONTINUITY SPECIFICATIONS

Tire location	TPMS control unit terminal name/No.
Tire location	Connector A (14P)	Connector B (20P)
Right-front	RF LF PWR./9	RF LF GND/14
Left-front	LF LF PWR./8	LF LF GND/13
Right-rear	RR LF PWR./11	RR LF GND/16
Left-rear	LR LF PWR./10	LR LF GND/15

Fig 4: Checking Continuity Between TPMS Control Unit Connector (14P) And Connector (20P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair the short in the appropriate wire between the TPMS control unit and the initiator.

NO -Replace the initiator (see INITIATOR REPLACEMENT ).

Turn the ignition switch ON (II).
Measure voltage between the appropriate terminal in TPMS control unit connector B (20P) and body ground individually.

Fig 5: Measuring Voltage Between TPMS Control Unit Connector (20P) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Repair the short to power in the appropriate wire between the TPMS control unit and the initiator.

NO -Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ) and recheck.