On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE
1. REMOVE INTEGRATION RELAY  2. INSPECT INTEGRATION RELAY (A/F)
NOTICE:
- Some relays are built into the integration relay. The integration relay
cannot be disassembled. If there is a malfunction in the circuit of the
integration relay, replace the integration relay.
- The internal circuit of the integration relay is as shown in the
illustration below. Inspect the integration relay using the following
procedures.
 (a) Measure the resistance of the A/F fuse.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
A/F fuse | Always |
Below 1 Ω | If the result is not as specified, replace the A/F fuse.
| (b) Measure the resistance of the A/F sensor heater relay. (1) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
1C-1 - 1A-4 | When battery voltage is not applied to terminals 1A-2 and 1A-3 |
10 kΩ or higher | | When battery voltage is applied to terminals 1A-2 and 1A-3 |
Below 1 Ω | If the result is not as specified, replace the integration relay. |
|
3. INSTALL INTEGRATION RELAY | 
