LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2007 >> SX4 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Air Bag System) >> Diagnostic Information and Procedures >> SIR Diagnostic System Check >> Troubleshooting
April 5, 2026: LEMON Manuals is launched! Read the announcement.

SIR Diagnostic System Check: Troubleshooting

WARNING: This page is about a different car, the 2005 Suzuki Reno and 2005 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: The sensing and the diagnosis module (SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for 1 minute after the ignition is OFF and the fuse has been removed. If the airbags and pretensioners are not disconnected, do not begin service until one minute has been passed after disconnecting power to the SDM. Otherwise, injury could result.
WARNING: During service procedure, be very careful when handling the SDM. Never strike or jar the SDM. Never power the supplemental inflatable restraints (SIR) when the SDM is not rigidly attached to the vehicle. All SDM mounting bolts must be carefully tightened, and the arrow on the SDM must be point toward the front of the vehicle to ensure proper operation of the SIR. The SDM could be activated if it is powered when it is not rigidly attached to the vehicle, resulting in unexpected deployment and possible injury.
SIR SYSTEM - DIAGNOSTIC PROCEDURES

Step Action Value(s) Yes No
1
  1. Turn the ignition switch ON.
  2. Observe the airbag indicator as the ignition is being turned ON.

Does the indicator flash seven times?		 - The system is OK Go to Step 2
2
  1. Turn the ignition to LOCK and remove the key.
  2. Connect the scan tool to the data link connector (DLC). Follow the directions given in the scan tool manual.

Are any DTCs displayed on the scan tool?		 - Go to the DTC check procedure Go to Step 3
3 Check the fuse F1 in the interior fuse box.
Is the fuse F1 blown?		 - Go to Step 4 Go to Step 5
4 Replace the fuse F1. - - -
5
  1. Disconnect the connector C207.
  2. Check the wiring shortage between the fuse F1 and the terminal 1 of the connector C207.

Is the wiring shorted?		 - Go to Step 12 Go to Step 6
6
  1. Disconnect the connector from the SDM.
  2. Check the wiring shortage between the terminal 26 of the SDM connector and the terminal 1 of the connector C207.

Is the wiring shorted?		 - Go to Step 12 Go to Step 7
7
  1. Check the wiring open between the terminal 13 of the DLC and the ground G202.

Is the wiring opened?		 - Go to Step 12 Go to Step 8
8
  1. Confirm the ignition switch ON.
  2. Check the voltage from the cigar lighter socket.

Is the voltage in the range of 11~14V?		 - Go to Step 10 Go to Step 9
9 Repair the wiring of cigar lighter socket - - -
10
  1. Check the wiring shortage or loop open between the terminal 4 of the connector C207 and the terminal 13 of the data link connector (DLC).

Is the wiring opened or shorted?		 - Go to Step 12 Go to Step 11
11
  1. Check the wiring shortage or loop open between the terminal 4 of the connector C207 and the terminal 54 of the SDM wiring connector.

Is the wiring opened or shorted?		 - Go to Step 12 Go to Step 13
12 Repair the wiring - - -
13 Replace the SDM. - - -
scientia non olet · About LEMON Manuals