FAULT CODE 232 Or 242

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.

Conditions For Fault Code - If resistance is too high or capacitance too low for over 10 seconds, OBD unit measures a resistance higher than is normal for seat belt tensioners, DTC 232 or 242 will be set.

Fault Symptom - None, except illumination of SRS warning light.

Fault Source - There is an open in SRS harness, seat belt tensioner, connector or capacitance too high or low in igniter.

Corrective Action

1) Turn ignition switch off. Disconnect negative battery cable. Disconnect connector to suspect seat belt tensioner. Connect SRS test resistor (998 8695) to suspect seat belt tensioner. See Figure.

2) Turn ignition switch to II position. Connect negative battery cable. Read DTC. Clear DTC. If DTC can be cleared, fault is probably seat belt tensioner. Go to next step. If DTC cannot be cleared, fault is probably in SRS ignition cable. Go to step 4).

3) Turn ignition switch off. Disconnect negative battery cable. Disconnect test resistor (998 9695). Connect connector to seat belt tensioner. Turn ignition switch to II position. Read DTC. If DTC is present, replace seat belt tensioner. See SEAT BELT TENSIONER under REMOVAL & INSTALLATION.

4) If DTC is not present, the fault is in SRS wiring harness. Turn ignition off. Disconnect negative battery cable. Connect SRS test resistor (998 8695) to seat belt tensioner. See Figure.

5) Remove soundproofing and knee bolster for access to connector 24/3 (driver-side seat belt tensioner) see Figure, or remove glove compartment for access to connector 24/4 (passenger-side seat belt tensioner) see Figure. Disconnect connector "A" from connector 24/3 (driver-side tensioner) or connector "B" from connector 24/4 (passenger-side tensioner).

6) Turn ignition switch to II position. Connect negative battery cable. Read DTC. Clear DTC. If DTC 232 or 234 is still present, go to next step. If DTC 232 or 234 are cleared, replace SRS cable harness.

7) Disconnect negative battery cable. Turn ignition switch off. For driver-side tensioner, measure resistance between terminals No. 7 of connector "A" and igniter terminal No. 1. Measure resistance between terminals No. 8 of connector "A" and service hole in igniter connector. Go to next step.

8) For passenger-side tensioner, measure resistance between terminal No. 17 of connector "B" and igniter terminal No. 1. Measure resistance between terminal No. 18 of connector "B" and service hole in igniter connector. If resistance is infinity in any measurements, replace SRS cable harness. If resistance is zero ohms, go to next step.

9) Ensure ignition is off. Measure resistance between service hole in igniter connector and terminal No. 2 of igniter connector. Resistance should increase rapidly to infinity. Reverse leads of ohmmeter and repeat test. Ohmmeter should drop rapidly to about zero volts and then increase to infinity. If resistance measurements are as specified, the capacitor is okay. Go to next step. If resistance measurements are not as specified, replace SRS cable harness.

10) Measure resistance between terminal No. 7 and 8 in connector 24/3 where connector "A" was connected. Remove connector "B" from connector 24/4. Measure resistance between terminal No. 17 and 18 of connector "B". If resistance is about 470000 ohms, replace SRS cable harness. If resistance is infinity, go to next step.

11) Ensure ignition switch is off. Disconnect SRS sensor module connector.

12) For driver-side tensioner, measure resistance between sensor module connector terminal 1 and connector 24/3 terminal No. 1 of connector "A". Measure resistance between sensor module connector terminal No. 2 and connector 24/3 terminal No. 8 of connector "A" where disconnected connector was connected.

13) For passenger-side tensioner, measure resistance between sensor module connector terminal No. 3 and terminal 17 of connector "B". Measure resistance between sensor module connector terminal No. 4 and terminal 18 of connector "B"

14) If resistance is zero ohms, replace sensor module. See SENSOR MODULE under REMOVAL & INSTALLATION.If resistance is infinity for any of the measurements, replace SRS cable harness. Clear fault codes and perform SYSTEM OPERATION CHECK .